CN105450578B - Signal processing method, device and electronic equipment - Google Patents
Signal processing method, device and electronic equipment Download PDFInfo
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- CN105450578B CN105450578B CN201410363032.8A CN201410363032A CN105450578B CN 105450578 B CN105450578 B CN 105450578B CN 201410363032 A CN201410363032 A CN 201410363032A CN 105450578 B CN105450578 B CN 105450578B
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Abstract
The embodiment of the invention discloses a kind of signal processing methods, device and electronic equipment, while carrying out sampling deviation compensation, the estimation of IQ imbalance is carried out using one section of sampled signal sequence is started, obtain IQ unbalance factor, and sampling deviation compensation and IQ imbalance compensation are carried out to the sampled signal sequence for obtaining obtaining after IQ unbalance factor, and sampling deviation value and IQ unbalance factor are all calculated using the same calculating factor, therefore, pass through signal processing method provided by the embodiments of the present application, computing resource is saved when carrying out sampling deviation compensation and IQ imbalance compensation, to reduce resource consumption.
Description
Technical field
The present invention relates to fields of communication technology, set more specifically to a kind of signal processing method, device and electronics
It is standby.
Background technique
In a communications system, since the sampling clock of transmitter and receiver is that different crystal oscillators generate, receiver
When sampling to the signal received, sampling deviation (also referred to as timing offset) can be generated, so that the letter that receiver samples
It number is not sampling on optimum sampling point, it is therefore desirable to which sampling deviation compensation is carried out to the signal that sampling comes out.In addition, receiver
Radio frequency (Radio Frequency, RF) in, theoretically require (inphase, the in-phase component) road I and Q (quadrature, just
Hand over component) conversion gain equal and orthogonal (that is, the phase difference on the road I and the road Q be 90 degree) on road.However, in systems in practice
Device can not strictly meet design requirement, thus cause the road receiver I and the road Q gain and phase occur it is unbalance, i.e. IQ is not
Therefore balance had not only needed to carry out sampling deviation compensation to the signal that receives in receiver end, but need to carry out 1Q imbalance into
Row compensation.
Inventor has found in the implementation of the present invention, at present sampling deviation compensation process and IQ imbalance compensation process
Independently of each other, the estimation and compensation of sampling deviation are such as first carried out, then carries out the unbalanced estimation of IQ and compensation, alternatively, first carrying out
The unbalanced estimation of IQ and compensation, then the estimation and compensation of sampling deviation are carried out, the resource of consuming is more.
Summary of the invention
The object of the present invention is to provide a kind of signal processing method and systems, are disappeared with the resource reduced in signal processing
Consumption.
To achieve the above object, the present invention provides the following technical scheme that
A kind of signal processing method is applied to electronic equipment, which comprises
The signal received is sampled to obtain sampled signal sequence；
Every sampled signal sequence for obtaining the second preset length is estimated to calculate using the sampling deviation for calculating the factor based on first
Method calculates the sampled signal sequence of the second acquired preset length, obtains a sampling deviation value；
Before acquired sampled signal sequence reaches the first preset length, saves described first and calculate the factor；
One sampling deviation value of every acquisition, it is corresponding with the sampling deviation value currently obtained according to obtained sampling deviation value pair
Each signal in the sampled signal sequence of second preset length carries out sampling deviation compensation；
When acquired sampled signal sequence reaches first preset length, the factor is calculated using based on described first
IQ imbalance algorithm for estimating the sampled signal sequence of the first acquired preset length is calculated, obtain IQ imbalance because
Son；
After acquired sampled signal sequence reaches first preset length, one sampling deviation value of every acquisition, foundation
Acquired sampling deviation value and the IQ unbalance factor, it is pre- to corresponding with the sampling deviation value currently obtained second
If each sampled signal in the sampled signal sequence of length carries out IQ imbalance compensation and sampling deviation compensation；
Wherein, second preset length is less than first preset length, and first preset length, which is less than, to be received
The length of the leader sequence of the signal arrived.
The above method, it is preferred that sampling deviation value acquired in the foundation and the IQ unbalance factor, to
Each sampled signal in the sampled signal sequence of corresponding second preset length of the sampling deviation value currently obtained carries out IQ not
Balanced compensated and sampling deviation compensates
It is default to described corresponding with sampling deviation value that is currently obtaining second according to current acquired sampling deviation value
Each signal in the sampled signal sequence of length carries out sampling deviation compensation；
Sampling according to the IQ unbalance factor pair the second preset length corresponding with the sampling deviation value currently obtained
IQ imbalance compensation is carried out by the compensated signal of sampling deviation in signal sequence.
The above method, it is preferred that sampling deviation value acquired in the foundation and the IQ unbalance factor, to
Each sampled signal in the sampled signal sequence of corresponding second preset length of the sampling deviation value currently obtained carries out IQ not
Balanced compensated and sampling deviation compensates
Sampling according to the IQ unbalance factor pair the second preset length corresponding with the sampling deviation value currently obtained
Each signal in signal sequence carries out IQ imbalance compensation；
According to sampling deviation value pair the second preset length corresponding with the sampling deviation value currently obtained currently obtained
Signal after carrying out IQ imbalance compensation in sampled signal sequence carries out sampling deviation compensation.
The above method, it is preferred that described first calculates the energy that the factor is sampled signal；
The calculation formula of the sampling deviation algorithm for estimating that the factor is calculated based on first is the first formula, and described first is public
Formula are as follows:
The calculation formula of the IQ imbalance algorithm for estimating that the factor is calculated based on described first is the second formula, described the
Two formula are as follows:
Wherein, ε is sampling deviation value；L indicates the second preset length；R (k) indicates the sampled signal sequence of the second preset length
The value of k-th of sampled signal in column；|r(k)|2Indicate the energy of k-th of sampled signal；R (i) indicates the first default length
The value of ith sample signal in the sampled signal sequence of degree；|r(i)|2Indicate the energy of the ith sample signal；arg
{ } indicates to calculate the operation of angle；Re () indicates to calculate the operation of real part；r*() expression carries out conjugation fortune to r ()
It calculates；W is IQ unbalance factor；M indicates the first preset length.
A kind of signal processing apparatus, is applied to electronic equipment, and described device includes:
Sampling module, for being sampled the signal received to obtain sampled signal sequence；
First computing module, for the every sampled signal sequence for obtaining the second preset length of the sampling module, using base
The sampled signal sequence of the second acquired preset length is calculated in the sampling deviation algorithm for estimating of the first calculating factor,
Obtain a sampling deviation value；
Preserving module before reaching the first preset length for the sampled signal sequence acquired in the sampling module, is protected
It deposits described first and calculates the factor；
First compensating module reaches the first preset length for the sampled signal sequence acquired in the sampling module
Before, one sampling deviation value of every acquisition, according to obtained sampling deviation value pair and the sampling deviation value corresponding second that currently obtains
Each signal in the sampled signal sequence of preset length carries out sampling deviation compensation；
Second computing module reaches the first preset length for the sampled signal sequence acquired in the sampling module
When, using sampled signal of the IQ imbalance algorithm for estimating to the first acquired preset length for calculating the factor based on described first
Sequence is calculated, and IQ unbalance factor is obtained；
Second compensating module reaches the first preset length for the sampled signal sequence acquired in the sampling module
Afterwards, one sampling deviation value of every acquisition, according to acquired sampling deviation value and the IQ unbalance factor, to currently obtain
Each sampled signal in the sampled signal sequence of corresponding second preset length of the sampling deviation value taken carries out IQ imbalance benefit
It repays and is compensated with sampling deviation；
Wherein, second preset length is less than first preset length, and first preset length, which is less than, to be received
The length of the leader sequence of the signal arrived.
Above-mentioned apparatus, it is preferred that second compensating module includes:
First compensating unit, for the current acquired sampling deviation value of foundation to sampling deviation that is described and currently obtaining
The each signal being worth in the sampled signal sequence of corresponding second preset length carries out sampling deviation compensation；
Second compensating unit, for according to the IQ unbalance factor pair corresponding with the sampling deviation value currently obtained
IQ imbalance compensation is carried out by the compensated signal of sampling deviation in the sampled signal sequence of two preset lengths.
Above-mentioned apparatus, it is preferred that second compensating module includes:
Third compensating unit, for according to the IQ unbalance factor pair corresponding with the sampling deviation value currently obtained
Each signal in the sampled signal sequence of two preset lengths carries out IQ imbalance compensation；
4th compensating unit, for corresponding with the sampling deviation value currently obtained according to the sampling deviation value pair currently obtained
The second preset length sampled signal sequence in carry out IQ imbalance compensation after signal carry out sampling deviation compensation.
Above-mentioned apparatus, it is preferred that described first calculates the energy that the factor is sampled signal；
First computing module includes the first computing unit, for the sampling module the second preset length of every acquisition
Sampled signal sequence calculates using sampled signal sequence of first formula to the second acquired preset length, obtains one
A sampling deviation value, first formula are as follows:
Second computing module includes the second computing unit, for the sampled signal sequence acquired in the sampling module
When column reach the first preset length, counted using sampled signal sequence of second formula to the first acquired preset length
It calculates, obtains IQ unbalance factor, second formula are as follows:
Wherein, ε is sampling deviation value；L indicates the second preset length；R (k) indicates the sampled signal sequence of the second preset length
The value of k-th of sampled signal in column；|r(k)|2Indicate the energy of k-th of sampled signal；R (i) indicates the first default length
The value of ith sample signal in the sampled signal sequence of degree；|r(i)|2Indicate the energy of the ith sample signal；arg
{ } indicates to calculate the operation of angle；Re () indicates to calculate the operation of real part；r*() expression carries out conjugation fortune to r ()
It calculates；W is IQ unbalance factor；M indicates the first preset length.
A kind of electronic equipment, including signal processing apparatus described in any one as above.
By above scheme it is found that a kind of signal processing method, device and electronic equipment provided by the present application, are being adopted
While sample deviation compensation, the estimation of IQ imbalance is carried out using one section of sampled signal sequence is started, obtains IQ unbalance factor, and
Sampling deviation compensation and IQ imbalance compensation are carried out to the sampled signal sequence for obtaining obtaining after IQ unbalance factor, and sampled
Deviation and IQ unbalance factor are all calculated using the same calculating factor, therefore, are provided by the embodiment of the present application
Signal processing method, sampling deviation compensation is being carried out and when IQ imbalance compensation saves computing resource, to reduce money
Source consumption.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of implementation flow chart of signal processing method provided by the embodiments of the present application；
Fig. 2 is sampling deviation value and the IQ unbalance factor acquired in foundation provided by the embodiments of the present application, right
Each sampled signal in the sampled signal sequence of the second preset length corresponding with the sampling deviation value currently obtained carries out IQ
A kind of implementation flow chart of imbalance compensation and sampling deviation compensation；
Fig. 3 is sampling deviation value and the IQ unbalance factor acquired in foundation provided by the embodiments of the present application, right
Each sampled signal in the sampled signal sequence of the second preset length corresponding with the sampling deviation value currently obtained carries out IQ
Another implementation flow chart of imbalance compensation and sampling deviation compensation；
Fig. 4 is a kind of structural schematic diagram of signal processing apparatus provided by the embodiments of the present application；
Fig. 5 is a kind of structural schematic diagram of the second compensating module provided by the embodiments of the present application；
Fig. 6 is another structural schematic diagram of the second compensating module provided by the embodiments of the present application；
Fig. 7 is a kind of structural schematic diagram of the first computing module provided by the embodiments of the present application；
Fig. 8 is a kind of structural schematic diagram of the second computing module provided by the embodiments of the present application；
Fig. 9 is another structural schematic diagram of signal processing apparatus provided by the embodiments of the present application.
Specification and claims and term " first " in above-mentioned attached drawing, " second ", " third " " the 4th " etc. (if
In the presence of) it is part for distinguishing similar, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so that embodiments herein described herein can be in addition to illustrating herein
Sequence in addition is implemented.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Signal processing method and device provided by the embodiments of the present application are applied to electronic equipment, which can receive
Signal.
Referring to Fig. 1, Fig. 1 is a kind of implementation flow chart of signal processing method provided by the embodiments of the present application, can wrap
It includes:
Step S11: the signal received is sampled to obtain sampled signal sequence；
Step S12: every sampled signal sequence for obtaining the second preset length, it is inclined using the sampling for calculating the factor based on first
Poor algorithm for estimating calculates the sampled signal sequence of the second acquired preset length, obtains a sampling deviation value；
In the embodiment of the present application, sampled signal sequence piecemeal is handled, a length of second preset length of block.
Step S13: before acquired sampled signal sequence reaches the first preset length, save it is described first calculate because
Son；
In the embodiment of the present application, the first preset length be greater than the second preset length, and the first preset length be less than received
The length of the leader sequence of the signal arrived.That is, in the sampled signal sequence of the first preset length include several second
The sampled signal sequence of preset length.
Step S14: one sampling deviation value of every acquisition, the sampling deviation value pair that foundation obtains and the sampling deviation currently obtained
The each signal being worth in the sampled signal sequence of corresponding second preset length carries out sampling deviation compensation；
Before the sampled signal sequence of acquisition reaches the first preset length, one sampling deviation value of every acquisition, according to what is obtained
Each letter in the sampled signal sequence of sampling deviation value pair the second preset length corresponding with the sampling deviation value currently obtained
Number carry out sampling deviation compensation.
It is specific how adopting according to sampling deviation value pair and corresponding second preset length of sampling deviation value that currently obtains
Each signal in sample signal sequence carries out the common knowledge that sampling deviation compensation belongs to this field, and which is not described herein again.
It should be noted that before the sampled signal sequence of acquisition reaches the first preset length, being protected in the embodiment of the present application
The step of depositing the first calculating factor and one sampling deviation value of every acquisition, according to obtained sampling deviation value pair and current acquisition
Corresponding second preset length of sampling deviation value sampled signal sequence in each signal carry out sampling deviation compensation step
Rapid execution sequence is not specifically limited, and can first carry out the step of saving the first calculating factor, then executes every acquisition one
Sampling deviation value, the sampling deviation value pair that foundation obtains are adopted with corresponding second preset length of sampling deviation value currently obtained
The step of each signal in sample signal sequence carries out sampling deviation compensation；Alternatively, one sampling deviation value of every acquisition is first carried out, according to
In sampled signal sequence according to obtained sampling deviation value pair the second preset length corresponding with the sampling deviation value currently obtained
Each signal carry out sampling deviation compensation the step of, then execute save it is described first calculate the factor the step of；Alternatively, saving institute
One sampling deviation value of the step of stating the first calculating factor and every acquisition is adopted according to obtained sampling deviation value pair with what is currently obtained
The step of each signal in the sampled signal sequence of corresponding second preset length of sample deviation carries out sampling deviation compensation is same
Shi Jinhang.
Step S15: when acquired sampled signal sequence reaches first preset length, using based on described first
The IQ imbalance algorithm for estimating for calculating the factor calculates the sampled signal sequence of the first acquired preset length, obtains IQ
Unbalance factor；
In the embodiment of the present application, (include the steps that calculating sampling deviation value and according to sampling in sampling deviation compensation process
Deviation carries out the step of sampling deviation compensation) in, IQ unbalance factor is calculated by way of multiplexing the first calculating factor.
In the embodiment of the present application, if when acquired sampled signal sequence reaches first preset length, simultaneously
Get a sampling deviation value, then calculate IQ unbalance factor simultaneously can be to corresponding with the sampling deviation value currently obtained
Each sampled signal in the sampled signal sequence of second preset length carries out sampling deviation compensation.
Step S16: after acquired sampled signal sequence reaches first preset length, one sampling deviation of every acquisition
Value, according to acquired sampling deviation value and the IQ unbalance factor, to corresponding with the sampling deviation value currently obtained
Each signal in the sampled signal sequence of second preset length carries out IQ imbalance compensation and sampling deviation compensation.
After obtaining IQ unbalance factor, one sampling deviation value of every acquisition, to the sampling deviation value pair that currently obtains
Signal in the sampled signal sequence for the second preset length answered carries out carrying out IQ imbalance compensation while sampling deviation compensation.
A kind of signal processing method provided by the present application is adopted while carrying out sampling deviation compensation using starting one section
Sample signal sequence (i.e. the sampled signal sequence of the first preset length) carries out the estimation of IQ imbalance, obtains IQ unbalance factor, and
Sampling deviation compensation and IQ imbalance compensation are carried out to the sampled signal sequence for obtaining obtaining after IQ unbalance factor, and sampled
Deviation and IQ unbalance factor are all calculated using the same calculating factor, that is to say, that in the embodiment of the present application, are led to
It crosses multiplexing the first calculating factor to realize sampling deviation compensation and IQ imbalance compensation while carrying out, thus carrying out sampling deviation benefit
Computing resource is saved during repaying with IQ imbalance compensation, to reduce resource consumption, also improves compensation efficiency.
In embodiment illustrated in fig. 1, it is preferred that sampling deviation value acquired in the foundation and the IQ imbalance because
Son, to each sampled signal in the sampled signal sequence of the second preset length corresponding with the sampling deviation value currently obtained into
Row IQ imbalance compensation and a kind of implementation flow chart of sampling deviation compensation are as shown in Fig. 2, may include:
Step S21: according to current acquired sampling deviation value to described corresponding with sampling deviation value that is currently obtaining
Each signal in the sampled signal sequence of second preset length carries out sampling deviation compensation；
Step S22: according to the IQ unbalance factor pair the second default length corresponding with the sampling deviation value currently obtained
IQ imbalance compensation is carried out by the compensated signal of sampling deviation in the sampled signal sequence of degree.
In the embodiment of the present application, first to the sampled signal of the second preset length corresponding with the sampling deviation value currently obtained
Each signal in sequence carries out sampling deviation compensation, then carries out IQ imbalance to the compensated each signal of sampling deviation is carried out
Compensation.
Specifically, can be in the sampled signal sequence to the second preset length corresponding with the sampling deviation value currently obtained
In ith sample signal carry out sampling deviation compensation after, to i+1 sampled signal progress sampling deviation compensation when, it is right
Ith sample signal carries out IQ imbalance compensation.
In embodiment illustrated in fig. 1, it is preferred that sampling deviation value acquired in the foundation and the IQ imbalance because
Son, to each sampled signal in the sampled signal sequence of the second preset length corresponding with the sampling deviation value currently obtained into
Row IQ imbalance compensation and another implementation flow chart of sampling deviation compensation are as shown in figure 3, may include:
Step S31: according to the IQ unbalance factor pair the second default length corresponding with the sampling deviation value currently obtained
Each signal in the sampled signal sequence of degree carries out IQ imbalance compensation；
Step S32: in advance according to the sampling deviation value pair corresponding with the sampling deviation value currently obtained second currently obtained
If carrying out the signal after IQ imbalance compensation in the sampled signal sequence of length carries out sampling deviation compensation.
In the embodiment of the present application, first to the sampled signal of the second preset length corresponding with the sampling deviation value currently obtained
Each signal in sequence carries out IQ imbalance compensation, then carries out sampling deviation to each signal after progress IQ imbalance compensation
Compensation.
Specifically, can be in the sampled signal sequence to the second preset length corresponding with the sampling deviation value currently obtained
In ith sample signal carry out IQ imbalance compensation after, to i+1 sampled signal progress IQ imbalance compensation when, it is right
Ith sample signal carries out sampling deviation compensation.
In above-described embodiment, it is preferred that described first calculates the energy that the factor can be sampled signal.
Correspondingly, the calculation formula of the sampling deviation algorithm for estimating for calculating the factor based on first can be public for first
Formula, first formula are as follows:
The calculation formula of the IQ imbalance algorithm for estimating that the factor is calculated based on first can be the second formula, described the
Two formula are as follows:
Wherein, ε is sampling deviation value；L indicates the second preset length；R (k) indicates the sampled signal sequence of the second preset length
The value of k-th of sampled signal in column；|r(k)|2Indicate the energy of k-th of sampled signal；R (i) indicates the first default length
The value of ith sample signal in the sampled signal sequence of degree；|r(i)|2Indicate the energy of the ith sample signal；arg
{ } indicates to calculate the operation of angle；Re () indicates to calculate the operation of real part；r*() expression carries out conjugation fortune to r ()
It calculates；W is IQ unbalance factor；M indicates the first preset length.
Since the first preset length is greater than the second preset length, it is wrapped in the sampled signal sequence of the first preset length
It includes several second and presets long sampled signal sequence, the calculating of sampling deviation value and IQ unbalance factor is all based on using signal
Energy, therefore, the used sampled signal when calculating IQ unbalance factor by the sampled signal sequence of the first preset length
Energy can be directly used and calculate sampling partially by the sampled signal sequence of the second preset length each in the first preset length
The energy value for the sampled signal being calculated when difference compensation is saved to reduce the calculation amount during IQ imbalance compensation
Computing resource.
In above-described embodiment, it is preferred that every to obtain one before acquired sampled signal sequence reaches the first preset length
The sampled signal sequence of second preset length can also be calculated and be saved in the sampled signal sequence of second preset length and own
The energy of sampled signal and value, so that second formula can simplify are as follows:
Wherein, R (j) is the sampling letter of j-th of second preset lengths in the sampled signal sequence of first preset length
The energy of all sampled signals of number sequence and value；N include by the sampled signal sequence of first preset length
The number of the sampled signal sequence of two preset lengths.
In the embodiment of the present application, during carrying out sampling deviation compensation, reach in acquired sampled signal sequence
Before first preset length, every sampled signal sequence for obtaining one second preset length calculates and saves second preset length
In sampled signal sequence the energy of all sampled signals and value, so as to be further reduced subsequent progress IQ imbalance compensation
When calculation amount, to further increase compensation efficiency.
Corresponding with embodiment of the method, the embodiment of the present application also provides a kind of signal processing apparatus, and the embodiment of the present application mentions
A kind of structural schematic diagram of the signal processing apparatus of confession is as shown in figure 4, may include:
Sampling module 41, the first computing module 42, preserving module 43, the first compensating module 44,45 He of the second computing module
Second compensating module 46；Wherein,
Sampling module 41 is for sampling to obtain sampled signal sequence the signal received；
First computing module 42 is for the every sampled signal sequence for obtaining the second preset length of the sampling module, using base
The sampled signal sequence of the second acquired preset length is calculated in the sampling deviation algorithm for estimating of the first calculating factor,
Obtain a sampling deviation value；
In the embodiment of the present application, sampled signal sequence piecemeal is handled, a length of second preset length of block.
Before preserving module 43 reaches the first preset length for the sampled signal sequence acquired in the sampling module, protect
It deposits described first and calculates the factor；
In the embodiment of the present application, the first preset length be greater than the second preset length, and the first preset length be less than received
The length of the leader sequence of the signal arrived.That is, in the sampled signal sequence of the first preset length include several second
The sampled signal sequence of preset length.
First compensating module 44 reaches the first preset length for the sampled signal sequence acquired in the sampling module
Before, one sampling deviation value of every acquisition, according to obtained sampling deviation value pair and the sampling deviation value corresponding second that currently obtains
Each signal in the sampled signal sequence of preset length carries out sampling deviation compensation；
Before the sampled signal sequence of acquisition reaches the first preset length, one sampling deviation value of every acquisition, according to what is obtained
Each letter in the sampled signal sequence of sampling deviation value pair the second preset length corresponding with the sampling deviation value currently obtained
Number carry out sampling deviation compensation.
Second computing module 45 reaches the first preset length for the sampled signal sequence acquired in the sampling module
When, using sampled signal of the IQ imbalance algorithm for estimating to the first acquired preset length for calculating the factor based on described first
Sequence is calculated, and IQ unbalance factor is obtained；
In the embodiment of the present application, (include the steps that calculating sampling deviation value and according to sampling in sampling deviation compensation process
Deviation carries out the step of sampling deviation compensation) in, IQ unbalance factor is calculated by way of multiplexing the first calculating factor.
In the embodiment of the present application, if when acquired sampled signal sequence reaches first preset length, simultaneously
Get a sampling deviation value, then calculate IQ unbalance factor simultaneously can be to corresponding with the sampling deviation value currently obtained
Each sampled signal in the sampled signal sequence of second preset length carries out sampling deviation compensation.
Second compensating module 46 reaches the first preset length for the sampled signal sequence acquired in the sampling module
Afterwards, one sampling deviation value of every acquisition, according to acquired sampling deviation value and the IQ unbalance factor, to currently obtain
Each sampled signal in the sampled signal sequence of corresponding second preset length of the sampling deviation value taken carries out IQ imbalance benefit
It repays and is compensated with sampling deviation；
After obtaining IQ unbalance factor, one sampling deviation value of every acquisition, to the sampling deviation value pair that currently obtains
Signal in the sampled signal sequence for the second preset length answered carries out carrying out IQ imbalance compensation while sampling deviation compensation.
A kind of signal processing apparatus provided by the embodiments of the present application, while carrying out sampling deviation compensation, using starting
One section of sampled signal sequence (i.e. the sampled signal sequence of the first preset length) carries out the estimation of IQ imbalance, obtain IQ imbalance because
Son, and sampling deviation compensation and IQ imbalance compensation are carried out to the sampled signal sequence for obtaining obtaining after IQ unbalance factor, and
And sampling deviation value and IQ unbalance factor are all calculated using the same calculating factor, that is to say, that the application is implemented
In example, realize that sampling deviation compensation and IQ imbalance compensation carry out simultaneously by multiplexing the first calculating factor, thus being adopted
Computing resource is saved during sample deviation compensation and IQ imbalance compensation, to reduce resource consumption, also improves benefit
Repay efficiency.
In embodiment illustrated in fig. 4, it is preferred that a kind of structural schematic diagram of second compensating module 46 is as shown in figure 5, can
To include:
First compensating unit 51 and the second compensating unit 52；Wherein,
First compensating unit 51 is used for according to current acquired sampling deviation value to described inclined with sampling that is currently obtaining
Each signal in the sampled signal sequence of corresponding second preset length of difference carries out sampling deviation compensation；
Second compensating unit 52 is used for corresponding with the sampling deviation value currently obtained according to the IQ unbalance factor pair
IQ imbalance compensation is carried out by the compensated signal of sampling deviation in the sampled signal sequence of second preset length.
In the embodiment of the present application, first to the sampled signal of the second preset length corresponding with the sampling deviation value currently obtained
Each signal in sequence carries out sampling deviation compensation, then carries out IQ imbalance to the compensated each signal of sampling deviation is carried out
Compensation.
Specifically, the second compensating unit 52 can be in the first compensating unit 51 to corresponding with the sampling deviation value currently obtained
The second preset length sampled signal sequence in ith sample signal carry out sampling deviation compensation after, adopted to i+1
When sample signal carries out sampling deviation compensation, IQ imbalance compensation is carried out to ith sample signal.
In embodiment illustrated in fig. 4, it is preferred that another structural schematic diagram of second compensating module 46 as shown in fig. 6,
May include:
Third compensating unit 61 and the 4th compensating unit 62；Wherein,
Third compensating unit 61 is used for corresponding with the sampling deviation value currently obtained according to the IQ unbalance factor pair
Each signal in the sampled signal sequence of second preset length carries out IQ imbalance compensation；
4th compensating unit 62 is used for the sampling deviation value pair that foundation currently obtains and the sampling deviation value pair currently obtained
Signal after carrying out IQ imbalance compensation in the sampled signal sequence for the second preset length answered carries out sampling deviation compensation.
In the embodiment of the present application, first to the sampled signal of the second preset length corresponding with the sampling deviation value currently obtained
Each signal in sequence carries out IQ imbalance compensation, then carries out sampling deviation to each signal after progress IQ imbalance compensation
Compensation.
Specifically, the 4th compensating unit 62 can be in third compensating unit 61 to corresponding with the sampling deviation value currently obtained
The second preset length sampled signal sequence in ith sample signal carry out IQ imbalance compensation after, adopted to i+1
When sample signal carries out IQ imbalance compensation, sampling deviation compensation is carried out to ith sample signal.
In above-mentioned any one Installation practice, it is preferred that described first calculates the energy that the factor is sampled signal.
Correspondingly, a kind of structural schematic diagram of first computing module 42 is as shown in fig. 7, may include the first calculating list
Member 71, for the every sampled signal sequence for obtaining the second preset length of the sampling module, using the first formula to acquired
The sampled signal sequence of second preset length is calculated, and a sampling deviation value, first formula are obtained are as follows:
A kind of structural schematic diagram of second computing module 45 is used as shown in figure 8, may include the second computing unit 81
When the sampled signal sequence acquired in the sampling module reaches the first preset length, using the second formula to acquired
The sampled signal sequence of first preset length is calculated, and IQ unbalance factor, second formula are obtained are as follows:
Wherein, ε is sampling deviation value；L indicates the second preset length；R (k) indicates the sampled signal sequence of the second preset length
The value of k-th of sampled signal in column；|r(k)|2Indicate the energy of k-th of sampled signal；R (i) indicates the first default length
The value of ith sample signal in the sampled signal sequence of degree；|r(i)|2Indicate the energy of the ith sample signal；arg
{ } indicates to calculate the operation of angle；Re () indicates to calculate the operation of real part；r*() expression carries out conjugation fortune to r ()
It calculates；W is IQ unbalance factor；M indicates the first preset length.
In above-described embodiment, it is preferred that on the basis of Fig. 7 and embodiment illustrated in fig. 8, letter provided by the embodiments of the present application
Another structural schematic diagram of number processing unit is as shown in figure 9, can also include:
Third computing module 91, respectively with the acquisition module 41, the preserving module 43 and second computing module
45 are connected, before reaching the first preset length for the sampled signal sequence acquired in the acquisition module 41, the acquisition
The every sampled signal sequence for obtaining one second preset length of module 41, calculates and saves the sampled signal sequence of second preset length
In column the energy of all sampled signals and value.
Correspondingly, second computing module 45 can also include third computing unit 92, based on according to third formula
Calculate IQ unbalance factor, the third formula are as follows:
Wherein, R (j) is the sampling letter of j-th of second preset lengths in the sampled signal sequence of first preset length
The energy of all sampled signals of number sequence and value；N include by the sampled signal sequence of first preset length
The number of the sampled signal sequence of two preset lengths.
In the embodiment of the present application, during carrying out sampling deviation compensation, reach in acquired sampled signal sequence
Before first preset length, every sampled signal sequence for obtaining one second preset length calculates and saves second preset length
In sampled signal sequence the energy of all sampled signals and value, so as to be further reduced subsequent progress IQ imbalance compensation
When calculation amount, to further increase compensation efficiency.
That is, the second computing module 45 provides the way of two kinds of calculating IQ unbalance factors in the embodiment of the present application
Diameter.The IQ imbalance compensation factor is calculated by the second computing unit 81 specifically, can choose；Also it can choose through third meter
Calculating unit 92 combines third to resolve the calculating IQ imbalance compensation factor of module 91.
The embodiment of the present application also provides a kind of electronic equipment, which has described in any one Installation practice as above
Signal processing apparatus.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. a kind of signal processing method is applied to electronic equipment, which is characterized in that the described method includes:
The signal received is sampled to obtain sampled signal sequence；
Every sampled signal sequence for obtaining the second preset length, using the sampling deviation algorithm for estimating pair for calculating the factor based on first
The sampled signal sequence of the second acquired preset length is calculated, and a sampling deviation value is obtained；
Before acquired sampled signal sequence reaches the first preset length, saves described first and calculate the factor；
One sampling deviation value of every acquisition, according to obtained sampling deviation value pair and the sampling deviation value corresponding second that currently obtains
Each signal in the sampled signal sequence of preset length carries out sampling deviation compensation；
When acquired sampled signal sequence reaches first preset length, using the IQ for calculating the factor based on described first
Uneven algorithm for estimating calculates the sampled signal sequence of the first acquired preset length, obtains IQ unbalance factor；
After acquired sampled signal sequence reaches first preset length, one sampling deviation value of every acquisition, foundation is obtained
The sampling deviation value taken and the IQ unbalance factor, to the corresponding with the sampling deviation value currently obtained second default length
Each sampled signal in the sampled signal sequence of degree carries out IQ imbalance compensation and sampling deviation compensation；
Wherein, second preset length is less than first preset length, and first preset length is less than received
The length of the leader sequence of signal.
2. the method according to claim 1, wherein sampling deviation value acquired in the foundation and described
IQ unbalance factor, to each in the sampled signal sequence of the second preset length corresponding with the sampling deviation value currently obtained
Sampled signal carries out IQ imbalance compensation and sampling deviation compensation includes:
According to current acquired sampling deviation value to second preset length corresponding with sampling deviation value that is currently obtaining
Sampled signal sequence in each signal carry out sampling deviation compensation；
Sampled signal according to the IQ unbalance factor pair the second preset length corresponding with the sampling deviation value currently obtained
IQ imbalance compensation is carried out by the compensated signal of sampling deviation in sequence.
3. the method according to claim 1, wherein sampling deviation value acquired in the foundation and described
IQ unbalance factor, to each in the sampled signal sequence of the second preset length corresponding with the sampling deviation value currently obtained
Sampled signal carries out IQ imbalance compensation and sampling deviation compensation includes:
Sampled signal according to the IQ unbalance factor pair the second preset length corresponding with the sampling deviation value currently obtained
Each signal in sequence carries out IQ imbalance compensation；
Sampling according to sampling deviation value pair the second preset length corresponding with the sampling deviation value currently obtained currently obtained
Signal after carrying out IQ imbalance compensation in signal sequence carries out sampling deviation compensation.
4. method according to claim 1 to 3, which is characterized in that described first calculates the factor as sampled signal
Energy；
The calculation formula of the sampling deviation algorithm for estimating that the factor is calculated based on first is the first formula, first formula
Are as follows:
The calculation formula of the IQ imbalance algorithm for estimating that the factor is calculated based on described first is the second formula, and described second is public
Formula are as follows:
Wherein, ε is sampling deviation value；L indicates the second preset length；R (k) is indicated in the sampled signal sequence of the second preset length
K-th of sampled signal value；|r(k)|2Indicate the energy of k-th of sampled signal；R (i) indicates the first preset length
The value of ith sample signal in sampled signal sequence；|r(i)|2Indicate the energy of the ith sample signal；arg{·}
Indicate the operation of calculating angle；Re () indicates to calculate the operation of real part；R* () indicates to carry out conjugate operation to r ()；W is
IQ unbalance factor；M indicates the first preset length.
5. a kind of signal processing apparatus, it is applied to electronic equipment, which is characterized in that described device includes:
Sampling module, for being sampled the signal received to obtain sampled signal sequence；
First computing module, for the every sampled signal sequence for obtaining the second preset length of the sampling module, using based on the
The sampling deviation algorithm for estimating of the one calculating factor calculates the sampled signal sequence of the second acquired preset length, obtains
One sampling deviation value；
Preserving module before reaching the first preset length for the sampled signal sequence acquired in the sampling module, saves institute
State the first calculating factor；
First compensating module, before reaching the first preset length for the sampled signal sequence acquired in the sampling module, often
A sampling deviation value is obtained, according to obtained sampling deviation value pair the second default length corresponding with the sampling deviation value currently obtained
Each signal in the sampled signal sequence of degree carries out sampling deviation compensation；
Second computing module is answered when reaching the first preset length for the sampled signal sequence acquired in the sampling module
With sampled signal sequence of the IQ imbalance algorithm for estimating to the first acquired preset length for calculating the factor based on described first
It is calculated, obtains IQ unbalance factor；
Second compensating module, after reaching the first preset length for the sampled signal sequence acquired in the sampling module, often
A sampling deviation value is obtained, according to acquired sampling deviation value and the IQ unbalance factor, is adopted to what is currently obtained
Each sampled signal in the sampled signal sequence of corresponding second preset length of sample deviation carries out IQ imbalance compensation and adopts
Sample deviation compensation；
Wherein, second preset length is less than first preset length, and first preset length is less than received
The length of the leader sequence of signal.
6. device according to claim 5, which is characterized in that second compensating module includes:
First compensating unit, for the current acquired sampling deviation value of foundation to sampling deviation value pair that is described and currently obtaining
Each signal in the sampled signal sequence for the second preset length answered carries out sampling deviation compensation；
Second compensating unit, for corresponding with the sampling deviation value currently obtained second pre- according to the IQ unbalance factor pair
If carrying out IQ imbalance compensation by the compensated signal of sampling deviation in the sampled signal sequence of length.
7. device according to claim 5, which is characterized in that second compensating module includes:
Third compensating unit, for corresponding with the sampling deviation value currently obtained second pre- according to the IQ unbalance factor pair
If each signal in the sampled signal sequence of length carries out IQ imbalance compensation；
4th compensating unit, for according to the sampling deviation value pair that currently obtains corresponding with the sampling deviation value currently obtained the
Signal after carrying out IQ imbalance compensation in the sampled signal sequence of two preset lengths carries out sampling deviation compensation.
8. according to device described in claim 5-7 any one, which is characterized in that described first calculates the factor as sampled signal
Energy；
First computing module includes the first computing unit, for the every sampling for obtaining the second preset length of the sampling module
Signal sequence calculates using sampled signal sequence of first formula to the second acquired preset length, obtains one and adopt
Sample deviation, first formula are as follows:
Second computing module includes the second computing unit, is reached for the sampled signal sequence acquired in the sampling module
When to the first preset length, calculates, obtain using sampled signal sequence of second formula to the first acquired preset length
To IQ unbalance factor, second formula are as follows:
Wherein, ε is sampling deviation value；L indicates the second preset length；R (k) is indicated in the sampled signal sequence of the second preset length
K-th of sampled signal value；|r(k)|2Indicate the energy of k-th of sampled signal；R (i) indicates the first preset length
The value of ith sample signal in sampled signal sequence；|r(i)|2Indicate the energy of the ith sample signal；arg{·}
Indicate the operation of calculating angle；Re () indicates to calculate the operation of real part；r*() indicates to carry out conjugate operation to r ()；W is
IQ unbalance factor；M indicates the first preset length.
9. a kind of electronic equipment, which is characterized in that including the signal processing apparatus as described in claim 5-8 any one.
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| CN100531168C (en) * | 2004-06-14 | 2009-08-19 | 威盛电子股份有限公司 | IQ imbalance compensation and device of using same and receiver |
| CN101938445A (en) * | 2009-06-30 | 2011-01-05 | 芯光飞株式会社 | Estimation and compensation method for IQ imbalance |
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