CN108111445A - A kind of method and apparatus of digital front-end equilibrium - Google Patents
A kind of method and apparatus of digital front-end equilibrium Download PDFInfo
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- CN108111445A CN108111445A CN201711480580.9A CN201711480580A CN108111445A CN 108111445 A CN108111445 A CN 108111445A CN 201711480580 A CN201711480580 A CN 201711480580A CN 108111445 A CN108111445 A CN 108111445A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0845—Weighted combining per branch equalization, e.g. by an FIR-filter or RAKE receiver per antenna branch
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03891—Spatial equalizers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/022—Channel estimation of frequency response
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The present embodiments relate to field of communication technology more particularly to a kind of method and apparatus of digital front-end equilibrium, including：Read the equalized sequence that equalized sequence receiving terminal receives；Frequency-domain transform is carried out respectively with the reference equalized sequence to prestore to the equalized sequence of the passage to be equalized of reading, respectively obtain the frequency domain equalization sequence of the passage to be equalized and refers to frequency domain equalization sequence；According to the frequency domain equalization sequence of the passage to be equalized and the frequency domain response for referring to frequency domain equalization sequence, determining the passage to be equalized；The corresponding equalizing coefficient of the passage to be equalized is determined according to the frequency domain response；Equilibrium treatment is carried out to the passage to be equalized according to the equalizing coefficient.As can be seen that selection is equalized sequence and the reference sequences to prestore, it is not using the equalized sequence of any passage as with reference to sequence, therefore, it will not be influenced be subject to reference channel, so as to eliminate influence of the channel-equalization to system performance, and then improve system performance.
Description
Technical field
The present embodiments relate to the communications field more particularly to a kind of method and apparatus of digital front-end equilibrium.
Background technology
In intelligent antenna system, the width of each radio-frequency channel in RRU (Radio Remote Unit, Remote Radio Unit)
Degree can generate the phenomenon that inconsistent with phase characteristic, and the inconsistency of this interchannel can influence intelligent antenna performance, Jin Erying
Ring antenna beam figuration effect, it is therefore necessary to the error of the amplitude of radio-frequency channel and phase is compensated using channel-equalization technology.
The amplitude-phase of all radio-frequency channels of RRU is adjusted to same amplitude-phase by the purpose of channel-equalization technology.
The prior art be the equalized sequence using any radio-frequency channel of RRU as reference channel, the amplitudes of rest channels with
Phase equalization is the amplitude and phase of reference channel, however this technology amplitude equalization can bring uncertain factor, equal with passage
The performance of weighing apparatus and the selection of reference channel are very related.For example, if the amplitude with reference to radio-frequency channel is excessive, then channel-equalization
Technology can improve the amplitude of all passages to be equalized, affect system performance.
The content of the invention
The embodiment of the present invention provides a kind of method and apparatus of digital front-end equilibrium, to eliminate channel-equalization to systematicness
The influence of energy, so as to improve system performance.
The embodiment of the present invention provides a kind of method of digital front-end equilibrium, including：
Read the equalized sequence that equalized sequence receiving terminal receives；
Frequency-domain transform is carried out respectively with the reference equalized sequence to prestore to the equalized sequence of the passage to be equalized of reading,
It respectively obtains the frequency domain equalization sequence of the passage to be equalized and refers to frequency domain equalization sequence；
According to the frequency domain equalization sequence of the passage to be equalized and the reference frequency domain equalization sequence, determine described to be equalized
The frequency domain response of passage；
The corresponding equalizing coefficient of the passage to be equalized is determined according to the frequency domain response；
Equilibrium treatment is carried out to the passage to be equalized according to the equalizing coefficient.
Preferably, the equalized sequence is uplink equalized sequence；
The frequency domain equalization sequence according to the passage to be equalized and the reference frequency domain equalization sequence, determine described treat
The frequency domain response of equalization channel, including：
According toDetermine the frequency domain response of the passage uplink equilibrium to be equalizedWherein, it is described
For the frequency domain response of the passage downlink equilibrium to be equalized, and when presently described passage to be equalized does not complete downlink equilibrium, institute
It statesFor 1；
Wherein, it is describedIt is described to be described with reference to frequency domain equalization sequenceFor the frequency domain equalization of the passage to be equalized
Sequence.
Preferably, the equalized sequence is downlink equalized sequence；
The frequency domain equalization sequence according to the passage to be equalized and the reference frequency domain equalization sequence, determine described treat
The frequency domain response of equalization channel, including：
The mean power of effective downlink equalized sequence in the downlink equalized sequence is obtained according to downlink frequency domain equalized sequence,
The downlink frequency domain equalized sequence is the frequency domain equalization sequence that the downlink equalized sequence is obtained through the frequency-domain transform；
The average amplitude of the passage to be equalized is obtained according to the mean power of effective downlink equalized sequence；
According to the corresponding downlink frequency domain equalized sequence of the passage to be equalized and described with reference to frequency domain equalization sequence and described
The mean power of effective downlink equalized sequence and the average amplitude of the passage to be equalized determine the frequency domain of the passage to be equalized
Response.
Preferably, the method further includes：
According to determining the average amplitude of the mean power of effective downlink equalized sequence and the passage to be equalized
The gain adjustment factor of passage to be equalized；
Gain tuning is carried out to the passage to be equalized according to the gain adjustment factor.
Preferably, described obtain effectively downlink equilibrium in the downlink equalized sequence according to the downlink frequency domain equalized sequence
The mean power of sequence, including：
The mean power of downlink frequency domain equalized sequence and the downlink frequency domain are obtained according to the downlink frequency domain equalized sequence
The mean power of noise in equalized sequence；
It is equal that the downlink is obtained according to the mean power of the downlink frequency domain equalized sequence and the mean power of the noise
The mean power of effective downlink equalized sequence in the sequence that weighs.
According to the corresponding downlink frequency domain equalized sequence of the passage to be equalized and described frequency domain equalization is referred to preferably, described
The average amplitude of the mean power and the passage to be equalized of sequence and effective downlink equalized sequence determines described to be equalized
The frequency domain response of passage, including：
According toDetermine the frequency domain response of the downlink equilibrium of the passage to be equalizedIts
In, it is describedFor the frequency domain response of the passage uplink equilibrium to be equalized, and when presently described passage to be equalized does not carry out uplink
It is described when balancedFor 1；
Wherein, it is describedFrequency domain equalization sequence is referred to be described；It is describedTo state the corresponding downlink frequency of passage to be equalized
Domain equalized sequence, the AmrefFor the average amplitude with reference to frequency domain equalization sequence, the AmiFor the passage to be equalized
Average amplitude, and the AmrefFor according to downlink frequency domain equalized sequence mean power, the mean power of the noise, described have
It imitates the mean power of downlink equalized sequence and the average amplitude of the passage to be equalized obtains.
It is preferably, described according to the mean power of effective downlink equalized sequence and the average width of the passage to be equalized
Degree determines the gain adjustment factor of the passage to be equalized, including：
According toDetermine to state the gain adjustment factor GAIN of passage to be equalized；
Wherein, the AmrefFor the average amplitude with reference to frequency domain equalization sequence, the AmiFor the passage to be equalized
Average amplitude.
The embodiment of the present invention also provides a kind of device of digital front-end equilibrium, including：
Read module, for reading the equalized sequence of equalized sequence receiving terminal reception；
Conversion module is distinguished for the equalized sequence of the passage to be equalized to reading with the reference equalized sequence to prestore
Frequency-domain transform is carried out, respectively obtain the frequency domain equalization sequence of the passage to be equalized and refers to frequency domain equalization sequence；
Determining module, for the frequency domain equalization sequence according to the passage to be equalized and it is described refer to frequency domain equalization sequence,
Determine the frequency domain response of the passage to be equalized；
Balance module, for determining the corresponding equalizing coefficient of the passage to be equalized, Yi Jiyong according to the frequency domain response
In carrying out equilibrium treatment to the passage to be equalized according to the equalizing coefficient.
Preferably, the equalized sequence is uplink equalized sequence；
The determining module, is specifically used for：
According toDetermine the frequency domain response of the passage uplink equilibrium to be equalizedWherein, it is described
For the frequency domain response of the passage downlink equilibrium to be equalized, and when presently described passage to be equalized does not complete downlink equilibrium, institute
It statesFor 1；
Wherein, it is describedIt is described to be described with reference to frequency domain equalization sequenceFor the frequency domain equalization of the passage to be equalized
Sequence.
Preferably, the equalized sequence is downlink equalized sequence；The determining module, is specifically used for：
The mean power of effective downlink equalized sequence in the downlink equalized sequence is obtained according to downlink frequency domain equalized sequence,
The downlink frequency domain equalized sequence is the frequency domain equalization sequence that the downlink equalized sequence is obtained through the frequency-domain transform；
The average amplitude of the passage to be equalized is obtained according to the mean power of effective downlink equalized sequence；
According to the corresponding downlink frequency domain equalized sequence of the passage to be equalized and described with reference to frequency domain equalization sequence and described
The mean power of effective downlink equalized sequence and the average amplitude of the passage to be equalized determine the frequency domain of the passage to be equalized
Response.
Preferably, it further includes：Gain module；
The gain module, for the mean power according to effective downlink equalized sequence and the passage to be equalized
Average amplitude determines the gain adjustment factor of the passage to be equalized；
It is additionally operable to carry out Gain tuning to the passage to be equalized according to the gain adjustment factor.
Preferably, the determining module, is specifically used for：
The mean power of downlink frequency domain equalized sequence and the downlink frequency domain are obtained according to the downlink frequency domain equalized sequence
The mean power of noise in equalized sequence；
It is equal that the downlink is obtained according to the mean power of the downlink frequency domain equalized sequence and the mean power of the noise
The mean power of effective downlink equalized sequence in the sequence that weighs.
Preferably, the determining module, is specifically used for：
According toDetermine the frequency domain response of the downlink equilibrium of the passage to be equalizedIts
In, it is describedFor the frequency domain response of the passage uplink equilibrium to be equalized, and when presently described passage to be equalized does not carry out uplink
It is described when balancedFor 1；
Wherein, it is describedFrequency domain equalization sequence is referred to be described；It is describedTo state the corresponding downlink frequency of passage to be equalized
Domain equalized sequence, the AmrefFor the average amplitude with reference to frequency domain equalization sequence, the AmiFor the passage to be equalized
Average amplitude, and the AmrefFor according to downlink frequency domain equalized sequence mean power, the mean power of the noise, described have
It imitates the mean power of downlink equalized sequence and the average amplitude of the passage to be equalized obtains.
Preferably, the gain module, is specifically used for：
According toDetermine to state the gain adjustment factor GAIN of passage to be equalized；
Wherein, the AmrefFor the average amplitude with reference to frequency domain equalization sequence, the AmiFor the passage to be equalized
Average amplitude.Another embodiment of the present invention provides a kind of computing device, including memory and processor, wherein, it is described
Memory is for storing program instruction, and the processor is used to call the program instruction stored in the memory, according to acquisition
Program perform any of the above-described kind of method.
Another embodiment of the present invention provides a kind of computer storage media, and the computer-readable recording medium storage has
Computer executable instructions, the computer executable instructions are used to that the computer to be made to perform any of the above-described kind of method.
The digital front-end equalization methods that above-described embodiment provides include：Read the balanced sequence that equalized sequence receiving terminal receives
Row；Frequency-domain transform is carried out respectively with the reference equalized sequence to prestore to the equalized sequence of the passage to be equalized of reading, respectively
It obtains the frequency domain equalization sequence of the passage to be equalized and refers to frequency domain equalization sequence；It is equal according to the frequency domain of the passage to be equalized
The sequence that weighs and the frequency domain response for referring to frequency domain equalization sequence, determining the passage to be equalized；It is true according to the frequency domain response
Determine the corresponding equalizing coefficient of the passage to be equalized；Equilibrium treatment is carried out to the passage to be equalized according to the equalizing coefficient.
It is that the equalized sequence of the passage to be equalized of reading is divided with the reference sequences to prestore first as can be seen that when doing channel-equalization
Frequency-domain transform is not carried out, obtains the frequency domain equalization sequence of passage to be equalized and refers to frequency domain equalization sequence；Then according to be equalized
The frequency domain equalization sequence of passage and reference frequency domain equalization sequence determine the frequency domain response of passage to be equalized, and according to frequency domain response
Determine the corresponding equalizing coefficient of passage to be equalized；Equalization channel is finally treated according to equalizing coefficient and carries out equilibrium treatment.Rather than
Using the equalized sequence of any passage as with reference to sequence, therefore, will not be influenced be subject to reference channel, so as to eliminate passage
Influence of the equilibrium to system performance, and then improve system performance.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced.
Fig. 1 is a kind of method flow schematic diagram of digital front-end equilibrium provided in an embodiment of the present invention；
Fig. 2 is the uplink structure diagram of RRU provided in an embodiment of the present invention a kind of；
Fig. 3 is a kind of method flow schematic diagram for digital front-end equilibrium that another embodiment of the present invention provides；
Fig. 4 is the method flow schematic diagram of the average amplitude of definite downlink equalized sequence provided in an embodiment of the present invention；
Fig. 5 is the method flow schematic diagram of the average amplitude of definite descending reference sequence provided in an embodiment of the present invention；
Fig. 6 is the downlink structure diagram of RRU provided in an embodiment of the present invention a kind of；
Fig. 7 is a kind of structure diagram of the balancer of digital front-end provided in an embodiment of the present invention.
Specific embodiment
In order to which the purpose of the present invention, technical solution and advantageous effect is more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
It should be noted that the embodiment of the present invention can frequently use i equalization channels in the de-scription, i equalization channels refer to
It is any equalization channel in antenna.
Fig. 1 illustrates a kind of method flow schematic diagram of digital front-end equilibrium provided in an embodiment of the present invention, such as
Shown in Fig. 1, this method may include：
S101, the equalized sequence that equalized sequence receiving terminal receives is read.
S102, frequency domain change is carried out respectively to the equalized sequence of the passage to be equalized of reading and the reference equalized sequence to prestore
It changes, respectively obtain the frequency domain equalization sequence of passage to be equalized and refers to frequency domain equalization sequence.
S103, according to the frequency domain equalization sequence of passage to be equalized and frequency domain equalization sequence is referred to, determines passage to be equalized
Frequency domain response.
S104, the corresponding equalizing coefficient of passage to be equalized is determined according to frequency domain response.
S105, equalization channel progress equilibrium treatment is treated according to equalizing coefficient.
In one embodiment, in above-mentioned steps S101, reading equalized sequence that equalized sequence receiving terminal receives can be with
It refers to reading the equalized sequence that equalized sequence receiving terminal receives in RRU.When the balanced sequence for reading the reception of equalized sequence receiving terminal
When row refer to reading the equalized sequence that equalized sequence receiving terminal receives in RRU, passage to be equalized in above-mentioned steps S102
Equalized sequence also refers to the equalized sequence of radio-frequency channel to be equalized.
Optionally, when equalized sequence is uplink equalized sequence, in above-mentioned steps S103, according to the frequency domain of passage to be equalized
Equalized sequence and reference frequency domain equalization sequence, determine the frequency domain response of passage to be equalized, refer to according to the upper of passage to be equalized
Line frequency domain equalized sequence and reference frequency domain equalization sequence determine the uplink frequency domain response of passage to be equalized.According to uplink frequency domain
The uplink frequency domain response after determining uplink frequency domain response, can be carried out IDFT by equalized sequence and the frequency domain reference sequences to prestore
(Inverse Discrete Fourier Transform, inverse discrete Fourier transform) is to ask for uplink equalization filter system
Then number writes the uplink coefficient of equalizing wave filter in corresponding uplink equalization filter, so that the uplink equalization filter
Coefficient comes into force.
Specifically, when equalized sequence is uplink equalized sequence, can the upper of passage to be equalized be determined according to following equation one
The balanced frequency domain response of row
In formula one,For the frequency domain response of the downlink equilibrium of passage to be equalized, and when current passage to be equalized not carry out
During downlink equilibrium,For 1, i.e., when current equalization passage is not handled downlink equilibrium sequence,For 1.For reference
Frequency domain equalization sequence,For the frequency domain equalization sequence of passage to be equalized.
When equalized sequence is uplink equalized sequence, above-mentioned method shown in FIG. 1 can be applied in RRU shown in Fig. 2, when
So it can also be applied in the RRU of other structures.Fig. 2 illustrates the structure diagram for the RRU that the embodiment of the present invention is applicable in,
As shown in Fig. 2, including：Multiple RF transceivers, multiple equalization filters, equalization channel, multiple ADC (Analog-to-
Digital Converter, analog-digital converter), multiple low noise, coupling disc.When above-mentioned method shown in FIG. 1 is applied to Fig. 2
In shown RRU, and when equalized sequence is uplink equalized sequence, two length can be previously generated in local and content is all identical
Equalized sequence and with reference to equalized sequence, then for any equalization channel, by equalized sequence by equalization channel, coupling disc,
Low noise, equalization filter are sent to RF transceiver, and reference sequences are stored in local.
It is equal in the frequency domain equalization sequence according to passage to be equalized and reference frequency domain when equalized sequence is downlink equalized sequence
Weigh sequence, and when determining the frequency domain response of passage to be equalized, the frequency domain that method flow shown in Fig. 3 determines passage to be equalized can be used
Response.
S301, the average work(that effective downlink equalized sequence in downlink equalized sequence is obtained according to downlink frequency domain equalized sequence
Rate, wherein, downlink frequency domain equalized sequence is the frequency domain equalization sequence that downlink equalized sequence is obtained through frequency-domain transform.
S302, the average amplitude that passage to be equalized is obtained according to the mean power of effective downlink equalized sequence.
S303, according to the corresponding downlink frequency domain equalized sequence of passage to be equalized and with reference to frequency domain equalization sequence and effectively under
The average amplitude of the mean power of row equalized sequence and passage to be equalized determines the frequency domain response of passage to be equalized.
In above-mentioned steps S301, effectively downlink is balanced in downlink equalized sequence is obtained according to downlink frequency domain equalized sequence
During the mean power of sequence, the mean power and downlink frequency of downlink frequency domain equalized sequence can be obtained according to downlink frequency domain equalized sequence
The mean power of noise in domain equilibrium sequence；Then obtained according to the mean power of the mean power of downlink frequency domain equalized sequence and noise
Obtain the mean power of effective downlink equalized sequence in downlink equalized sequence.
In above-mentioned steps S303, according to the corresponding downlink frequency domain equalized sequence of passage to be equalized and with reference to frequency domain equalization
Sequence and the effectively mean power of downlink equalized sequence and the average amplitude of passage to be equalized determine the frequency domain of passage to be equalized
During response, the frequency domain response of the downlink equilibrium of passage to be equalized can be determined according to following equation two
In formula two,For the frequency domain response of passage uplink equilibrium to be equalized, and when current passage to be equalized not carry out
When row is balanced,For 1, i.e., when current equalization passage is not handled uplink equilibrium,For 1.
In formula two,To refer to frequency domain equalization sequence；For the corresponding downlink frequency domain equalized sequence of passage to be equalized,
AmrefFor the average amplitude with reference to frequency domain equalization sequence, AmiFor the average amplitude of passage to be equalized, and AmrefFor according to downlink frequency
The mean power of domain equalized sequence, the mean power of noise, the mean power of effective downlink equalized sequence and passage to be equalized
Average amplitude obtains.
Preferably, the average amplitude of the downlink equalized sequence of passage to be equalized can be determined by method flow shown in Fig. 4
Ami。
The noise power of S401, the mean power for determining downlink frequency domain equalized sequence and downlink frequency domain equalized sequence.
Specifically, after frequency-domain transform is carried out to downlink time domain equalization sequence and obtains downlink frequency domain equalized sequence, it can root
The mean power of downlink frequency domain equalized sequence is determined according to following equation three.
In formula three,The discrete fourier for being f for the value in the downlink frequency domain equalized sequence of the i-th passage to be equalized
Value after computing, N be descending reference sequence length, PiFor the average work(of the downlink frequency domain equalized sequence of the i-th passage to be equalized
Rate.
It, can be according to following public affairs after frequency-domain transform is carried out to downlink time domain equalization sequence and obtains downlink frequency domain equalized sequence
Formula four determines the noise average power of downlink frequency domain equalized sequence.
In formula four,The discrete fourier for being f for the value in the downlink frequency domain equalized sequence of the i-th passage to be equalized
Value after computing, N be descending reference sequence length, NREFor current bandwidth resource element prime number, PowerniIt is to be equalized logical for i-th
The noise average power of the downlink frequency domain equalized sequence in road.
S402, according to the mean power of downlink frequency domain equalized sequence and the noise power of downlink frequency domain equalized sequence, determine
The effective mean power of downlink frequency domain equalized sequence.
Specifically, the mean power P of downlink frequency domain equalized sequence is being obtained according to above-mentioned formula threeiWith according to above-mentioned formula
Four obtain the noise average power Powern of downlink frequency domain equalized sequenceiAfter, can downlink frequency domain be determined according to following equation five
The effective mean power of equalized sequence.
PowerSi=Pi-Powerni(formula five)
In formula five, PiFor the mean power of the downlink frequency domain equalized sequence of the i-th passage to be equalized, PowerniIt is treated for i-th
The noise average power of the downlink frequency domain equalized sequence of equalization channel, PowerSiIt is balanced for the downlink frequency domain of the i-th passage to be equalized
The effective mean power of sequence.
S403, the effective mean power according to downlink frequency domain equalized sequence determine the downlink frequency domain of the passage to be equalized
The average amplitude of equalized sequence.
Specifically, after the effective mean power of downlink frequency domain equalized sequence is obtained according to above-mentioned formula five, it can basis
Following equation six determines the average amplitude of downlink equalized sequence.
In formula six, PowerSiFor the effective mean power of the downlink frequency domain equalized sequence of the i-th passage to be equalized, AmiFor
The average amplitude of the downlink frequency domain equalized sequence of i-th passage to be equalized.
In above-mentioned steps S402, according to the noise of the mean power of downlink frequency domain equalized sequence and downlink frequency domain equalized sequence
Power determines the effective mean power of downlink frequency domain equalized sequence, in the specific implementation, also can be straight in order to reduce calculation amount
Connect the effective mean power according to the directly definite downlink frequency domain equalized sequence of following equation seven.
In formula seven,The discrete fourier for being f for the value in the downlink frequency domain equalized sequence of the i-th passage to be equalized
Value after computing, N be descending reference sequence length, NREFor current bandwidth resource element prime number, PowerSiIt is to be equalized logical for i-th
The effective mean power of the downlink frequency domain equalized sequence in road.
Then further according to the mean power of downlink frequency domain equalized sequence, determined using above-mentioned formula six under passage to be equalized
The average amplitude of row equalized sequence.
Wherein, the average amplitude Am of reference sequences can be determined by the method flow shown in Fig. 5ref。
The noise power of S501, the mean power for determining frequency domain reference sequences and frequency domain reference sequences.
Specifically, after reference sequences are carried out with frequency-domain transform and obtains frequency domain reference sequences, it can be according to following equation ten
Determine the mean power of downlink frequency domain reference sequences.
In formula eight,The value after discrete fourier computing for being f for the value in frequency domain reference sequences, N are reference
The length of sequence, PrefFor the mean power of frequency domain reference sequences.
After reference sequences are carried out with frequency-domain transform and obtains frequency domain reference sequences, can frequency domain be determined according to following equation nine
The noise average power of reference sequences.
In formula nine,The value after discrete fourier computing for being f for the value in frequency domain reference sequences, N are reference
The length of sequence, NREFor current bandwidth resource element prime number, PowernrefFor the noise average power of frequency domain reference sequences.
S502, according to the mean power of frequency domain reference sequences and the noise power of frequency domain reference sequences, determine frequency domain reference
The effective mean power of sequence.
Specifically, the mean power P of downlink frequency domain reference sequences is being obtained according to above-mentioned formula eightrefWith according to above-mentioned public affairs
Formula nine obtains the noise average power Powern of downlink frequency domain reference sequencesrefAfter, can downlink frequency be determined according to following equation ten
The effective mean power of domain reference sequences.
PowerSref=Pref-Powernref(formula ten)
In formula ten, PrefFor the mean power of frequency domain reference sequences, PowernrefIt is averaged for the noise of frequency domain reference sequences
Power, PowerSrefFor the effective mean power of frequency domain reference sequences.
S503, the effective mean power according to frequency domain reference sequences, determine passage to be equalized frequency domain reference sequences it is flat
Equal amplitude.
Specifically, after the effective mean power of downlink frequency domain reference sequences is obtained according to above-mentioned formula ten, it can basis
Following equation 11 determines the average amplitude of reference sequences.
In formula 11, PowerSrefFor the effective mean power of frequency domain reference sequences, AmrefFor being averaged for reference sequences
Amplitude.
It is the noise power of mean power according to frequency domain reference sequences and frequency domain reference sequences in above-mentioned steps S502,
Determine the effective mean power of frequency domain reference sequences, it in the specific implementation, also can be directly according to following in order to reduce calculation amount
Formula 12 directly determines the effective mean power of frequency domain reference sequences.
In formula 12,The discrete fourier fortune for being f for the value in the frequency domain reference sequences of the i-th passage to be equalized
Value after calculation, N be reference sequences length, NREFor current bandwidth resource element prime number, PowerSrefFor the frequency of the i-th passage to be equalized
The effective mean power of domain reference sequences.
Then further according to the mean power of frequency domain reference sequences, the reference of passage to be equalized is determined using above-mentioned formula 11
The average amplitude of sequence.
Optionally, when equalized sequence is downlink equalized sequence, in order to further reduce balancing error, also treat
The passage that weighs carries out Gain tuning, can be according to the average amplitude of downlink equalized sequence when treating equalization channel progress Gain tuning
AmiWith the average amplitude Am of reference sequencesref, the downlink gain adjustment factor of passage to be equalized is determined, then by the downlink gain
Adjustment factor is written in gain module, and Gain tuning is carried out to treat equalization channel.
Specifically, it according to following equation 13, can determine the downlink gain adjustment factor GAIN of passage to be equalized.
Wherein, AmrefFor the average amplitude with reference to frequency domain equalization sequence, AmiFor the average amplitude of the passage to be equalized.
In one embodiment, above-mentioned method shown in Fig. 3 can be applied in the RRU shown in Fig. 6, as shown in fig. 6, bag
It includes：Multiple RF transceivers, multiple equalization filters, multiple peak-clipping modules, multiple digital pre-distortion blocks, multiple gain moulds
Block, multiple DAC (Digital-to-Analog Converter, digital analog converter), multiple power amplifier modules, equalization channel, coupling
Disk.It can be naturally also applied in the RRU of other structures.
It is the equalized sequence to the passage to be equalized of reading first from the above, it is seen that when doing channel-equalization
Frequency-domain transform is carried out respectively with the reference sequences to prestore, obtains the frequency domain equalization sequence of passage to be equalized and refers to frequency domain equalization sequence
Row；Then according to the frequency domain equalization sequence of passage to be equalized and with reference to frequency domain equalization sequence, determine that the frequency domain of passage to be equalized is rung
Should, and the corresponding equalizing coefficient of passage to be equalized is determined according to frequency domain response；Finally according to equalizing coefficient treat equalization channel into
Row equilibrium treatment.Rather than using the equalized sequence of any passage as with reference to sequence, therefore, the shadow of reference channel will not be subject to
It rings, so as to eliminate influence of the channel-equalization to system performance, and then improves system performance.
Based on identical technical concept, the embodiment of the present invention also provides a kind of device of digital front-end equilibrium, such as Fig. 7 institutes
Show, which includes：
Read module 701, for reading the equalized sequence of equalized sequence receiving terminal reception；
Conversion module 702, the equalized sequence and the reference equalized sequence that prestores for the passage to be equalized to reading
Frequency-domain transform is carried out respectively, respectively obtains the frequency domain equalization sequence of the passage to be equalized and refers to frequency domain equalization sequence；
Determining module 703, for the frequency domain equalization sequence according to the passage to be equalized and the reference frequency domain equalization sequence
Row determine the frequency domain response of the passage to be equalized；
Balance module 704, for according to the frequency domain response determine the corresponding equalizing coefficient of the passage to be equalized and
For carrying out equilibrium treatment to the passage to be equalized according to the equalizing coefficient.
Preferably, the equalized sequence is uplink equalized sequence；Determining module 703, is specifically used for：
According toDetermine the frequency domain response of the passage uplink equilibrium to be equalizedWherein, it is described
For the frequency domain response of the passage downlink equilibrium to be equalized, and when presently described passage to be equalized does not complete downlink equilibrium, institute
It statesFor 1；
Wherein, it is describedIt is described to be described with reference to frequency domain equalization sequenceFor the frequency domain equalization of the passage to be equalized
Sequence.
Preferably, the equalized sequence is downlink equalized sequence；Determining module 703, is specifically used for：
The mean power of effective downlink equalized sequence in the downlink equalized sequence is obtained according to downlink frequency domain equalized sequence,
The downlink frequency domain equalized sequence is the frequency domain equalization sequence that the downlink equalized sequence is obtained through the frequency-domain transform；
The average amplitude of the passage to be equalized is obtained according to the mean power of effective downlink equalized sequence；
According to the corresponding downlink frequency domain equalized sequence of the passage to be equalized and described with reference to frequency domain equalization sequence and described
The mean power of effective downlink equalized sequence and the average amplitude of the passage to be equalized determine the frequency domain of the passage to be equalized
Response.
Preferably, it further includes：Gain module 705；
Gain module 705, for the mean power according to effective downlink equalized sequence and the passage to be equalized
Average amplitude determines the gain adjustment factor of the passage to be equalized；
It is additionally operable to carry out Gain tuning to the passage to be equalized according to the gain adjustment factor.
Preferably, determining module 703, is specifically used for：
The mean power of downlink frequency domain equalized sequence and the downlink frequency domain are obtained according to the downlink frequency domain equalized sequence
The mean power of noise in equalized sequence；
It is equal that the downlink is obtained according to the mean power of the downlink frequency domain equalized sequence and the mean power of the noise
The mean power of effective downlink equalized sequence in the sequence that weighs.
Preferably, determining module 703, is specifically used for：
According toDetermine the frequency domain response of the downlink equilibrium of the passage to be equalizedIts
In, it is describedFor the frequency domain response of the passage uplink equilibrium to be equalized, and when presently described passage to be equalized does not carry out uplink
It is described when balancedFor 1；
Wherein, it is describedFrequency domain equalization sequence is referred to be described；It is describedTo state the corresponding downlink frequency of passage to be equalized
Domain equalized sequence, the AmrefFor the average amplitude with reference to frequency domain equalization sequence, the AmiFor the passage to be equalized
Average amplitude, and the AmrefFor according to downlink frequency domain equalized sequence mean power, the mean power of the noise, described have
It imitates the mean power of downlink equalized sequence and the average amplitude of the passage to be equalized obtains.
Preferably, gain module 705, is specifically used for：
According toDetermine to state the gain adjustment factor GAIN of passage to be equalized；
Wherein, the AmrefFor the average amplitude with reference to frequency domain equalization sequence, the AmiFor the passage to be equalized
Average amplitude.
An embodiment of the present invention provides a kind of computing device, which is specifically as follows desktop computer, portable
Computer, smart mobile phone, tablet computer, personal digital assistant (Personal Digital Assistant, PDA) etc..The meter
Central processing unit (Center Processing Unit, CPU), memory, input-output apparatus etc. can be included by calculating equipment,
Input equipment can include keyboard, mouse, touch-screen etc., and output equipment can include display device, such as liquid crystal display
(Liquid Crystal Display, LCD), cathode-ray tube (Cathode Ray Tube, CRT) etc..
Memory can include read-only memory (ROM) and random access memory (RAM), and provide storage to processor
The program instruction and data stored in device.In embodiments of the present invention, memory can be used for storing above-mentioned digital front-end equilibrium
The program of method.
By calling the program instruction of memory storage, processor is used to perform bag according to the program instruction of acquisition processor
Containing for performing the program of above-mentioned digital front-end equalization methods.
An embodiment of the present invention provides a kind of computer storage media, for saving as the calculating used in above-mentioned computing device
Machine program instruction, it includes for performing the program of above-mentioned digital front-end equalization methods.
The computer storage media can be any usable medium or data storage device that computer can access, bag
Include but be not limited to magnetic storage (such as floppy disk, hard disk, tape, magneto-optic disk (MO) etc.), optical memory (such as CD, DVD,
BD, HVD etc.) and semiconductor memory (such as it is ROM, EPROM, EEPROM, nonvolatile memory (NAND FLASH), solid
State hard disk (SSD)) etc..To sum up, data feedback channel equilibrium either is being done, is still doing down going channel equilibrium, selection is all reference
Sequence and equalized sequence rather than using the equalized sequence of any passage as with reference to sequence, therefore, will not be subject to reference channel
It influences, so as to eliminate influence of the channel-equalization to system performance, and then improves system performance.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or the embodiment in terms of combining software and hardware can be used in the present invention
Form.It is deposited moreover, the present invention can be used to can use in one or more computers for wherein including computer usable program code
The shape for the computer program product that storage media is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
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
It selects embodiment and falls 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 (16)
- A kind of 1. method of digital front-end equilibrium, which is characterized in that including：Read the equalized sequence that equalized sequence receiving terminal receives；Frequency-domain transform is carried out respectively with the reference equalized sequence to prestore to the equalized sequence of the passage to be equalized of reading, respectively It obtains the frequency domain equalization sequence of the passage to be equalized and refers to frequency domain equalization sequence；According to the frequency domain equalization sequence of the passage to be equalized and the reference frequency domain equalization sequence, the passage to be equalized is determined Frequency domain response；The corresponding equalizing coefficient of the passage to be equalized is determined according to the frequency domain response；Equilibrium treatment is carried out to the passage to be equalized according to the equalizing coefficient.
- 2. the method as described in claim 1, which is characterized in that the equalized sequence is uplink equalized sequence；The frequency domain equalization sequence according to the passage to be equalized and the reference frequency domain equalization sequence, determine described to be equalized The frequency domain response of passage, including：According toDetermine the frequency domain response of the passage uplink equilibrium to be equalizedWherein, it is describedFor institute The frequency domain response of passage downlink equilibrium to be equalized is stated, and when presently described passage to be equalized does not carry out downlink equilibrium, it is described For 1；Wherein, it is describedIt is described to be described with reference to frequency domain equalization sequenceFor the frequency domain equalization sequence of the passage to be equalized.
- 3. the method as described in claim 1, which is characterized in that the equalized sequence is downlink equalized sequence；The frequency domain equalization sequence according to the passage to be equalized and the reference frequency domain equalization sequence, determine described to be equalized The frequency domain response of passage, including：The mean power of effective downlink equalized sequence in the downlink equalized sequence is obtained according to downlink frequency domain equalized sequence, it is described Downlink frequency domain equalized sequence is the frequency domain equalization sequence that the downlink equalized sequence is obtained through the frequency-domain transform；The average amplitude of the passage to be equalized is obtained according to the mean power of effective downlink equalized sequence；According to the corresponding downlink frequency domain equalized sequence of the passage to be equalized and it is described with reference to frequency domain equalization sequence and it is described effectively The average amplitude of the mean power of downlink equalized sequence and the passage to be equalized determines the frequency domain response of the passage to be equalized.
- 4. according to the method described in claim 3, it is characterized in that, the method further includes：It is treated according to determining the average amplitude of the mean power of effective downlink equalized sequence and the passage to be equalized The gain adjustment factor of weighing apparatus passage；Gain tuning is carried out to the passage to be equalized according to the gain adjustment factor.
- It is 5. according to the method described in claim 3, it is characterized in that, described according to obtaining the downlink frequency domain equalized sequence The mean power of effective downlink equalized sequence in downlink equalized sequence, including：The mean power of downlink frequency domain equalized sequence and downlink frequency domain equilibrium are obtained according to the downlink frequency domain equalized sequence The mean power of noise in sequence；The downlink equilibrium sequence is obtained according to the mean power of the downlink frequency domain equalized sequence and the mean power of the noise The mean power of effective downlink equalized sequence in row.
- It is 6. according to the method described in claim 5, it is characterized in that, described according to the corresponding downlink frequency domain of the passage to be equalized Equalized sequence and the mean power with reference to frequency domain equalization sequence and effective downlink equalized sequence and described to be equalized logical The average amplitude in road determines the frequency domain response of the passage to be equalized, including：According toDetermine the frequency domain response of the downlink equilibrium of the passage to be equalizedWherein, institute It statesFor the frequency domain response of the passage uplink equilibrium to be equalized, and when presently described passage to be equalized does not carry out uplink equilibrium When, it is describedFor 1；Wherein, it is describedFrequency domain equalization sequence is referred to be described；It is describedIt is equal to state the corresponding downlink frequency domain of passage to be equalized Weigh sequence, the AmrefFor the average amplitude with reference to frequency domain equalization sequence, the AmiFor being averaged for the passage to be equalized Amplitude, and the AmrefFor according to downlink frequency domain equalized sequence mean power, the mean power of the noise, it is described effectively under The average amplitude of the mean power of row equalized sequence and the passage to be equalized obtains.
- 7. the according to the method described in claim 4, it is characterized in that, average work(according to effective downlink equalized sequence The average amplitude of rate and the passage to be equalized determines the gain adjustment factor of the passage to be equalized, including：According toDetermine to state the gain adjustment factor GAIN of passage to be equalized；Wherein, the AmrefFor the average amplitude with reference to frequency domain equalization sequence, the AmiFor the flat of the passage to be equalized Equal amplitude.
- 8. a kind of device of digital front-end equilibrium, which is characterized in that including：Read module, for reading the equalized sequence of equalized sequence receiving terminal reception；Conversion module carries out respectively for the equalized sequence of the passage to be equalized to reading with the reference equalized sequence to prestore Frequency-domain transform respectively obtains the frequency domain equalization sequence of the passage to be equalized and refers to frequency domain equalization sequence；Determining module for the frequency domain equalization sequence according to the passage to be equalized and the reference frequency domain equalization sequence, determines The frequency domain response of the passage to be equalized；Balance module, for determining the corresponding equalizing coefficient of the passage to be equalized and according to the frequency domain response for root Equilibrium treatment is carried out to the passage to be equalized according to the equalizing coefficient.
- 9. device as claimed in claim 8, which is characterized in that the equalized sequence is uplink equalized sequence；The determining module, is specifically used for：According toDetermine the frequency domain response of the passage uplink equilibrium to be equalizedWherein, it is describedFor institute The frequency domain response of passage downlink equilibrium to be equalized is stated, and when presently described passage to be equalized does not complete downlink equilibrium, it is described For 1；Wherein, it is describedIt is described to be described with reference to frequency domain equalization sequenceFor the frequency domain equalization sequence of the passage to be equalized.
- 10. device as claimed in claim 8, which is characterized in that the equalized sequence is downlink equalized sequence；The determining module, is specifically used for：The mean power of effective downlink equalized sequence in the downlink equalized sequence is obtained according to downlink frequency domain equalized sequence, it is described Downlink frequency domain equalized sequence is the frequency domain equalization sequence that the downlink equalized sequence is obtained through the frequency-domain transform；The average amplitude of the passage to be equalized is obtained according to the mean power of effective downlink equalized sequence；According to the corresponding downlink frequency domain equalized sequence of the passage to be equalized and it is described with reference to frequency domain equalization sequence and it is described effectively The average amplitude of the mean power of downlink equalized sequence and the passage to be equalized determines the frequency domain response of the passage to be equalized.
- 11. device according to claim 10, which is characterized in that further include：Gain module；The gain module, for being averaged for the mean power according to effective downlink equalized sequence and the passage to be equalized Amplitude determines the gain adjustment factor of the passage to be equalized；It is additionally operable to carry out Gain tuning to the passage to be equalized according to the gain adjustment factor.
- 12. device according to claim 10, which is characterized in that the determining module is specifically used for：The mean power of downlink frequency domain equalized sequence and downlink frequency domain equilibrium are obtained according to the downlink frequency domain equalized sequence The mean power of noise in sequence；The downlink equilibrium sequence is obtained according to the mean power of the downlink frequency domain equalized sequence and the mean power of the noise The mean power of effective downlink equalized sequence in row.
- 13. device according to claim 12, which is characterized in that the determining module is specifically used for：According toDetermine the frequency domain response of the downlink equilibrium of the passage to be equalizedWherein, institute It statesFor the frequency domain response of the passage uplink equilibrium to be equalized, and when presently described passage to be equalized does not carry out uplink equilibrium When, it is describedFor 1；Wherein, it is describedFrequency domain equalization sequence is referred to be described；It is describedIt is equal to state the corresponding downlink frequency domain of passage to be equalized Weigh sequence, the AmrefFor the average amplitude with reference to frequency domain equalization sequence, the AmiFor being averaged for the passage to be equalized Amplitude, and the AmrefFor according to downlink frequency domain equalized sequence mean power, the mean power of the noise, it is described effectively under The average amplitude of the mean power of row equalized sequence and the passage to be equalized obtains.
- 14. according to the devices described in claim 11, which is characterized in that the gain module is specifically used for：According toDetermine to state the gain adjustment factor GAIN of passage to be equalized；Wherein, the AmrefFor the average amplitude with reference to frequency domain equalization sequence, the AmiFor the flat of the passage to be equalized Equal amplitude.
- 15. a kind of computing device, which is characterized in that including：Memory, for storing program instruction；For calling the program instruction stored in the memory, 1 to 7 is required according to the program execution profit of acquisition for processor Any one of them method.
- 16. a kind of computer storage media, which is characterized in that the computer storage media is stored with computer and can perform finger Order, the computer executable instructions are used to that the computer perform claim to be made to require 1 to 7 any one of them method.
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| WO2019128167A1 (en) * | 2017-12-29 | 2019-07-04 | 京信通信系统（中国）有限公司 | Digital front-end equalization method and device |
| CN110661736A (en) * | 2018-06-30 | 2020-01-07 | 上海华为技术有限公司 | Signal processing method and related device |
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| CN104779989A (en) * | 2015-05-11 | 2015-07-15 | 重庆大学 | Boardband array correcting filter coefficient calculation method |
| WO2016145371A2 (en) * | 2015-03-11 | 2016-09-15 | Phluido, Inc. | Distributed radio access network with adaptive fronthaul |
| CN107171981A (en) * | 2016-03-08 | 2017-09-15 | 华为技术有限公司 | channel correcting method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016145371A2 (en) * | 2015-03-11 | 2016-09-15 | Phluido, Inc. | Distributed radio access network with adaptive fronthaul |
| CN104779989A (en) * | 2015-05-11 | 2015-07-15 | 重庆大学 | Boardband array correcting filter coefficient calculation method |
| CN107171981A (en) * | 2016-03-08 | 2017-09-15 | 华为技术有限公司 | channel correcting method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019128167A1 (en) * | 2017-12-29 | 2019-07-04 | 京信通信系统（中国）有限公司 | Digital front-end equalization method and device |
| CN110661736A (en) * | 2018-06-30 | 2020-01-07 | 上海华为技术有限公司 | Signal processing method and related device |
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