CN104065598B - Broadband IQ disequilibrium regulatings method, apparatus and system - Google Patents

Broadband IQ disequilibrium regulatings method, apparatus and system Download PDF

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CN104065598B
CN104065598B CN201310091673.8A CN201310091673A CN104065598B CN 104065598 B CN104065598 B CN 104065598B CN 201310091673 A CN201310091673 A CN 201310091673A CN 104065598 B CN104065598 B CN 104065598B
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frequency
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phase error
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CN104065598A (en
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樊立韬
刘山鸣
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Huawei Technologies Co Ltd
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Abstract

The present invention provides a kind of broadband IQ disequilibrium regulatings method, apparatus and system.This method includes.The embodiment of the present invention can improve calibration result.This method includes the signal after the sampling according to corresponding to the radiofrequency signal of each frequency in broadband system, calculates the range error estimate and phase error estimation and phase error value of each frequency；The range error estimate and phase error estimation and phase error value for the frequency for determining to choose are searched according to the range error estimate of each frequency and phase error estimation and phase error value, according to the range error estimate and phase error estimation and phase error value of the frequency of the selection, calculate correcting filter coefficient, and the correcting filter coefficient is output to IQ means for correctings so that the IQ means for correctings carry out IQ disequilibrium regulatings according to the correcting filter coefficient.The embodiment of the present invention can improve calibration result.

Description

Broadband IQ disequilibrium regulatings method, apparatus and system
Technical field
The present invention relates to the communication technology, more particularly to a kind of broadband in-phase component quadrature component（In-phase Quadrate, IQ）Disequilibrium regulating method, apparatus and system.
Background technology
Zero intermediate frequency（Zero Intermediate Frequency, ZIF）Receiver is that one kind directly moves higher frequency To the receiver of zero-frequency, power consumption can be reduced relative to superhet, and reduces chance of the radiofrequency signal by external disturbance. But after radiofrequency signal is passed directly to zero-frequency by zero intermediate frequency reciver, there is IQ imbalance problems in signal.
In the prior art, imbalance of amplitude and phase coefficient can be obtained by the method for statistical average, using the width being calculated Phase unbalance factor is balanced correction to IQ two-way.The program is ideal for narrow band signal correction, still, for broadband Signal, it is not two constant correction parameters, therefore calibration result is bad due to the function that imbalance of amplitude and phase coefficient is frequency.
The content of the invention
In view of this, the embodiments of the invention provide a kind of broadband IQ disequilibrium regulating methods, devices and systems, to solve The problem of certainly calibration result is bad in the prior art.
First aspect, there is provided a kind of IQ disequilibrium regulatings method, including：
Signal after the sampling according to corresponding to the radiofrequency signal of each frequency in broadband system, calculate the amplitude of each frequency Error estimate and phase error estimation and phase error value；
The frequency of determination selection is searched according to the range error estimate of each frequency and phase error estimation and phase error value Range error estimate and phase error estimation and phase error value, estimated according to the range error estimate and phase error of the frequency of the selection Evaluation, correcting filter coefficient is calculated, and the correcting filter coefficient is output to IQ means for correctings so that the IQ corrections Device carries out IQ disequilibrium regulatings according to the correcting filter coefficient.
With reference in a first aspect, in the first possible implementation of first aspect, in addition to：
The range error estimate and phase error estimation and phase error value of each frequency are preserved, to search the frequency for determining to choose The range error estimate and phase error estimation and phase error value of point.
With reference to the possible implementation of the first of first aspect or first aspect, second in first aspect is possible In implementation, the radiofrequency signal is test signal or service signal, when the radiofrequency signal is test signal, the side Method also includes：
Generate the radiofrequency signal.
With reference to the possible implementation of the first of first aspect or first aspect, the third in first aspect is possible In implementation, the signal after the sampling according to corresponding to the radiofrequency signal of each frequency in broadband system, each frequency is calculated The range error estimate and phase error estimation and phase error value of point, including：
Corresponding each frequency, the data signal of the frequency is generated using NCO；
To the signal after the data signal sampling corresponding with the frequency of the frequency, carry out correlation and add up, obtain phase Close the signal after adding up；
Signal after cumulative to the correlation carries out Fourier transformation, obtains Fourier transformation value corresponding to the frequency；
According to Fourier transformation value corresponding to the frequency, the range error estimate and phase error of the frequency are obtained Estimate.
With reference to the third possible implementation of first aspect, in the 4th kind of possible implementation of first aspect In, the Fourier transformation value according to corresponding to the frequency, obtain the range error estimate and phase error of the frequency The calculation formula of estimate is：
Wherein, fiFor a frequency in broadband system,For frequency fiRange error estimate,For frequency fi Phase error estimate, fsFor sample rate,It isConjugate function,WithIt is that S (k) exists respectivelyWithWhen value, S (k) is xi(n) value after Fourier transformation, xi(n) it is frequency fiSignal after corresponding sampling, N are that the Fourier chosen becomes The points changed, round () represent the computing that rounds up, and real () is real part, and imag () is imaginary part.
With reference in a first aspect, in the 5th kind of possible implementation of first aspect, the frequency according to the selection The range error estimate and phase error estimation and phase error value of point, the calculation formula for calculating correcting filter coefficient are：
Wherein, H1And H (z)2(z) expression formula of the wave filter respectively corrected for I roads and Q roads, M are the frequency chosen Number, fj,fmFor the frequency of selection,WithThe frequency f respectively chosenmRange error estimate and phase miss The estimate of difference, fsFor sample rate.
Second aspect, there is provided one kind correction detection means, including：
Parameter calculating module, for according to corresponding to the radiofrequency signal of each frequency in broadband system sampling after signal, Calculate the range error estimate and phase error estimation and phase error value of each frequency；
Correcting filter coefficients calculation block, for the range error estimate and phase error according to each frequency Estimate searches the range error estimate and phase error estimation and phase error value for the frequency for determining to choose, according to the frequency of the selection Range error estimate and phase error estimation and phase error value, correcting filter coefficient is calculated, and the correcting filter coefficient is exported To IQ means for correctings so that the IQ means for correctings carry out IQ disequilibrium regulatings according to the correcting filter coefficient.
With reference to second aspect, in the first possible implementation of second aspect, in addition to：
Frequency point parameters table module, for preserving the range error estimate and phase error estimation and phase error value of each frequency, So that the correcting filter coefficients calculation block is missed from the amplitude of the frequency of the frequency point parameters table module acquisition selection Poor estimate and phase error estimation and phase error value.
With reference to the possible implementation of the first of second aspect or second aspect, second in second aspect is possible In implementation, the radiofrequency signal is test signal or service signal, described to set when the radiofrequency signal is test signal It is standby also to include：
Frequency signal source, for generating the radiofrequency signal, so that the parameter calculating module obtains the radiofrequency signal Signal after corresponding sampling.
With reference to the possible implementation of the first of second aspect or second aspect, the third in second aspect is possible In implementation, the parameter calculating module includes：
Frequency NCO, for corresponding each frequency, using the data signal of the NCO generations frequency；
Related summing elements, for the signal after the sampling corresponding with the frequency of the data signal to the frequency, enter Row is related cumulative, obtains the signal after related add up；
Fourier transform unit, for carrying out Fourier transformation to signal of the correlation after cumulative, obtain the frequency Corresponding Fourier transformation value；
Frequency point parameters computing unit, for the Fourier transformation value according to corresponding to the frequency, obtain the width of the frequency Spend error estimate and phase error estimation and phase error value.
With reference to the third possible implementation of second aspect, in the 4th kind of possible implementation of second aspect In, the frequency point parameters computing unit is specifically used for using formula is calculated as below, according to Fourier transformation corresponding to the frequency Value, obtains the range error estimate and phase error estimation and phase error value of the frequency：
Wherein, fiFor a frequency in broadband system,For frequency fiRange error estimate,For frequency fi Phase error estimate, fsFor sample rate,It isConjugate function,WithIt is that S (k) exists respectivelyWithWhen value, S (k) is xi(n) value after Fourier transformation, xi(n) it is frequency fiSignal after corresponding sampling, N are that the Fourier chosen becomes The points changed, round () represent the computing that rounds up, and real () is real part, and imag () is imaginary part.
With reference to second aspect, in the 5th kind of possible implementation of second aspect, the correcting filter coefficient meter Module is calculated to be specifically used for using formula is calculated as below, according to the range error estimate and phase error estimation and phase error of each frequency Value, calculate correcting filter coefficient：
Wherein, H1And H (z)2(z) expression formula of the wave filter respectively corrected for I roads and Q roads, M are the frequency chosen Number, fj,fmFor the frequency of selection,WithThe frequency f respectively chosenmRange error estimate and phase miss The estimate of difference, fsFor sample rate.
With reference to the third possible implementation of second aspect, in the 5th kind of possible implementation of second aspect In, the frequency NCO, related summing elements and Fourier transform unit are located in FPGA；
The frequency point parameters computing unit and the correcting filter coefficients calculation block are located in DSP.
The third aspect, there is provided a kind of IQ disequilibrium regulatings system, including：
Correction detection means described in any one of second aspect；And
IQ means for correctings are uneven to carrying out IQ for the correcting filter coefficient exported according to the correction detection means Weighing apparatus correction.
Pass through above-mentioned technical proposal, the range error estimate and phase error estimation and phase error value of each frequency in broadband are calculated, The amplitude for the frequency for determining to choose can be searched from the range error estimate and phase error estimation and phase error value of each frequency Error estimate and phase error estimation and phase error value, range error estimate and phase error estimation and phase error value meter further according to the frequency of selection Correcting filter coefficient is calculated, can due to considering the parameter for the frequency each chosen in broadband when correcting filter coefficient calculates The channel characteristic of broadband signal, can improve calibration result corresponding to the frequency chosen with simulation.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, for this For the those of ordinary skill of field, without having to pay creative labor, other can also be obtained according to these accompanying drawings Accompanying drawing.
Fig. 1 is a kind of schematic flow sheet of IQ disequilibrium regulatings method provided in an embodiment of the present invention；
Fig. 2 is the schematic flow sheet of another IQ disequilibrium regulatings method provided in an embodiment of the present invention；
Fig. 3 is system structure diagram corresponding to Fig. 2；
Fig. 4 is the structural representation of IQ means for correctings in the embodiment of the present invention；
Fig. 5 is the structural representation of correcting filter in the embodiment of the present invention；
Fig. 6 is the schematic flow sheet of another IQ disequilibrium regulatings method provided in an embodiment of the present invention；
Fig. 7 is system structure diagram corresponding to Fig. 6；
Fig. 8 is a kind of structural representation for correcting detection means provided in an embodiment of the present invention；
Fig. 9 is another structural representation for correcting detection means provided in an embodiment of the present invention；
Figure 10 is another structural representation for correcting detection means provided in an embodiment of the present invention；
Figure 11 is a kind of structural representation of parameter calculating module in the embodiment of the present invention；
Figure 12 is another structural representation for correcting detection means provided in an embodiment of the present invention
Figure 13 is a kind of structural representation of IQ disequilibrium regulatings system provided in an embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 is a kind of schematic flow sheet of IQ disequilibrium regulatings method provided in an embodiment of the present invention, including：
11：Correct the signal after detection means samples according to corresponding to the radiofrequency signal of each frequency in broadband system, meter Calculate the range error estimate and phase error estimation and phase error value of each frequency；
Frequency can use fiRepresent, frequency fiSignal x after corresponding samplingi(n) can be expressed as：
Wherein, α be radio frequency link range error, ε be radio frequency link phase error, fsFor sample rate.
The calculation formula of range error estimate and phase error estimation and phase error value can be：
Wherein,For the estimate of range error,For the estimate of phase error,It isConjugate function,WithIt is that S (k) exists respectivelyWithWhen value, S (k) is xi(n) value after Fourier transformation, N are the points for the Fourier transformation chosen, For example, 256 or 1024, round () represent to round up computing, real () is real part, and imag () is imaginary part.
The calculating of above-mentioned range error estimate and phase error estimation and phase error value specifically can be derived from by following manner, Ideally, following two Fourier transformation values can be learnt：
According to above-mentioned two Fourier transformation value, it is possible to be derived from above-mentioned amplitude error value and phase error.
12：Detection means is corrected to be searched really according to the range error estimate and phase error estimation and phase error value of each frequency Surely the range error estimate and phase error estimation and phase error value for the frequency chosen, estimated according to the range error of the frequency of the selection Value and phase error estimation and phase error value, correcting filter coefficient is calculated, and the correcting filter coefficient is output to IQ means for correctings, So that the IQ means for correctings carry out IQ disequilibrium regulatings according to the correcting filter coefficient.
For example, a width of 40M of band of whole broadband system, chooses frequency at equal intervals in units of 1M, then whole broadband system Frequency points in system are 40；And in the specific implementation, the frequency points that can be chosen and the frequency in whole broadband system Number is different, for example, in the specific implementation, the bandwidth of input can be 20M, it is assumed that and sampled point corresponding to the 20M is 4, that Error estimate corresponding to 4 frequencies of the selection, the mistake can be found out in error estimate corresponding to 40 frequencies Poor estimate includes range error estimate and phase error estimation and phase error value.
Calculating the formula of correcting filter coefficient can be：
Wherein, H1And H (z)2(z) be respectively two correcting filters expression formula, be respectively used to carry out school to I roads and Q roads Just, fjAnd fmFor the value of frequency point of selection,WithThe frequency f respectively chosenmRange error estimate and phase error Estimate, fsFor sample rate, M is the number for the frequency chosen.
In above-mentioned correcting filter expression formula, denominatorIt is constant, molecule can Calculated by the method for convolution, i.e., withIterative convolution.
The present embodiment calculates correction filter by the range error estimate and phase error estimation and phase error value of the frequency according to selection Ripple device coefficient, it may be considered that the influence for the frequency each chosen, improve calibration result.
In the embodiment of the present invention, radiofrequency signal corresponding to each frequency can be test signal, that is, special caused Signal, or, radiofrequency signal corresponding to each frequency can also be service signal, that is, need not specially produce signal, and It is to utilize the signal in the business being normally carried out.
Fig. 2 is the schematic flow sheet of another IQ disequilibrium regulatings method provided in an embodiment of the present invention, and Fig. 3 is Fig. 2 pairs The system structure diagram answered, the present embodiment is by taking test signal as an example.Referring to Fig. 2, the flow includes：
21：Correct detection means and produce radio frequency tone signal, and be input to the low-noise amplifier of receiving terminal（Low Noise Amplifier, LNA）Before.
It is understood that the radio frequency tone signal can also be produced by other devices.
Radio frequency tone signal refers to the radiofrequency signal of corresponding single frequency, for example, can be carried out to the bandwidth of broadband system Decile is chosen, and determines each frequency, corresponds to each frequency afterwards and produces a radio frequency tone signal.
22：Radio frequency tone signal is after radio frequency link, by analog-digital converter（Analog-to-Digital Converter, ADC）Sampled, carry out direct current afterwards（Direct Current, DC）Bias compensation.
Above-mentioned radio frequency link can include LNA, analogue quadrature moducator（Analog Quadrature Modulation, AQM）, wave filter（Filter）.Can there are range error and phase error in the radio frequency link.
Due to the presence of range error and phase error, as described above, fiCorresponding radio frequency tone signal is biased in DC and mended The signal exported after repaying can be expressed as：
23：Range error estimate and phase error estimation and phase error value that detection means calculates each frequency are corrected, and according to every The range error estimate and phase error estimation and phase error value of individual frequency search the range error estimate and phase for the frequency for determining to choose Position error estimate, according to the range error estimate and phase error estimation and phase error value of the frequency of the selection, calculate correction filtering Device coefficient.
Specific formula for calculation may refer to the embodiment shown in Fig. 1, i.e.
Design parameter implication may refer to embodiment illustrated in fig. 1.
24：Correction filter coefficient is exported and gives IQ means for correctings by correction detection means, and IQ means for correctings are according to the coefficient Carry out IQ disequilibrium regulatings.
The structure of IQ means for correctings can be as shown in Figure 4.Referring to Fig. 4, the I roads signal of DC bias compensations device output （din_i）Three tunnels can be divided into, the first via postpones M-1 cycle（Z1-M）, the second tunnel device H after filtering1(z), this two-way afterwards Exported after Signal averaging, the I roads signal after as correcting.3rd tunnel of I roads signal device H after filtering2(z) after, biased with DC The Q roads signal of compensation device output（din_q）Superposition, the Q roads signal after being corrected.
Optionally, due to H1And H (z)2(z) general exponent number（I.e. 2M-1）It is relatively low, therefore, as shown in figure 5, wave filter H1(z) And H2(z) logical construction of tapped delay can be used.Wherein, the number postponed in Fig. 5, i.e. Z-1Number and it is corresponding filtering The exponent number of device is identical, further, since the filter coefficient of head and the tail both sides is identical, therefore the wave filter being input in IQ means for correctings Coefficient can be the filter system of the first half in all filter systems being calculated, i.e. filter coefficient （Coefi, i=1 ..., n, n=2M-2）Inputted by correction detection means.
The present embodiment is by calculating the range error estimate and phase error estimation and phase error value of each frequency, and according to each frequency The above-mentioned estimate of point finds out the error estimate of the frequency of selection, and correction filter is calculated according to the frequency error estimate of selection Ripple device coefficient, it may be considered that the influence for the frequency each chosen, improve calibration result.The present embodiment can be using test signal Timing is needed specially to complete IQ disequilibrium regulatings.
Fig. 6 is the schematic flow sheet of another IQ disequilibrium regulatings method provided in an embodiment of the present invention, and Fig. 7 is Fig. 6 pairs The system structure diagram answered, the present embodiment is by taking service signal as an example.Referring to Fig. 6, the flow includes：
61：Correct the signal that detection means receives the output of DC bias compensations device.
Unlike embodiment illustrated in fig. 2, the present embodiment does not need self-generating signal, can be directly to the business of progress Scanning frequency obtains signal corresponding to each frequency.
Embodiment similar to Figure 2, because radio frequency link has range error and phase error, correction detection means connects The corresponding frequency f of receiptsiSignal can be expressed as：
62：Range error estimate and phase error estimation and phase error value that detection means calculates each frequency are corrected, and according to every The range error estimate and phase error estimation and phase error value of individual frequency search the range error estimate and phase for the frequency for determining to choose Position error estimate, according to the range error estimate and phase error estimation and phase error value of the frequency of the selection, calculate correction filtering Device coefficient.
Specific formula for calculation may refer to the embodiment shown in Fig. 1, i.e.
Design parameter implication may refer to embodiment illustrated in fig. 1.
63：Correction filter coefficient is exported and gives IQ means for correctings by correction detection means, and IQ means for correctings are according to the coefficient Carry out IQ disequilibrium regulatings.
The structure of IQ means for correctings may refer to Fig. 4, wave filter H1And H (z)2(z) structure may refer to Fig. 5, specific interior Appearance may refer to the explanation in embodiment illustrated in fig. 2 to Fig. 4 and Fig. 5.It is understood that the filtering that the embodiment of the present invention provides Device H1And H (z)2(z) structure is a kind of example, can also use the structure of other manner.
The present embodiment is by calculating the range error estimate and phase error estimation and phase error value of each frequency, and according to each frequency The above-mentioned estimate of point searches the error estimate for the frequency for determining to choose, and is calculated according to the error estimate of the frequency of selection Correcting filter coefficient, it may be considered that the influence for the frequency each chosen, improve calibration result.The present embodiment uses service signal IQ disequilibrium regulatings can be completed in the business of progress.
Fig. 8 is a kind of structural representation for correcting detection means provided in an embodiment of the present invention, and the device 80 includes parameter Computing module 81 and correcting filter coefficients calculation block 82, parameter calculating module 81 are used for according to each frequency in broadband system Radiofrequency signal corresponding to sample after signal, calculate the range error estimate and phase error estimation and phase error value of each frequency；School Positive filter coefficient computing module 82 is used to be looked into according to the range error estimate and phase error estimation and phase error value of each frequency The range error estimate and phase error estimation and phase error value for the frequency for determining to choose are looked for, according to the range error of the frequency of the selection Estimate and phase error estimation and phase error value, correcting filter coefficient is calculated, and the correcting filter coefficient is output to IQ corrections Device so that the IQ means for correctings carry out IQ disequilibrium regulatings according to the correcting filter coefficient.
Optionally, frequency point parameters table module 83 can also be included referring to Fig. 9, the device 80, frequency point parameters table module 83 is used In the range error estimate and phase error estimation and phase error value that preserve each frequency, so that the correcting filter coefficient calculates Module obtains the range error estimate and phase error estimation and phase error value of each frequency from the frequency point parameters table module.
Optionally, the radiofrequency signal is test signal or service signal.
Referring to Figure 10, when the radiofrequency signal is test signal, the equipment can also include：Frequency signal source 84, frequency Point signal source 84 is used to generate the radiofrequency signal, so that the parameter calculating module obtains sampling corresponding to the radiofrequency signal Signal afterwards.
Optionally, frequency numerically-controlled oscillator can be included referring to Figure 11, parameter calculating module 81（Numerical Controlled Oscillator, NCO）811st, related summing elements 812, Fourier transform unit 813 and frequency point parameters calculate Unit 814；Frequency NCO 811 is used for corresponding each frequency, and the data signal of the frequency is generated using NCO；Correlation is cumulative single The signal that member 812 is used for after the data signal sampling corresponding with the frequency to the frequency, progress is related cumulative, obtains phase Close the signal after adding up；Fourier transform unit 813 is used for the signal after being added up to the correlation and carries out Fourier transformation, obtains Fourier transformation value corresponding to the frequency；Frequency point parameters computing unit 814 is used for the Fourier according to corresponding to the frequency and become Value is changed, obtains the range error estimate and phase error estimation and phase error value of the frequency.Wherein, Fourier transformation can be specially fast Fast Fourier transformation（Fast Fourier Transform, FFT）.Above-mentioned related cumulative number can be 2048 times.Figure 11 Signal after the sampling of middle related summing elements input can be specially by ADC and the signal after DC bias compensations.
Optionally, the frequency point parameters computing unit is specifically used for, using formula is calculated as below, being corresponded to according to the frequency Fourier transformation value, obtain the range error estimate and phase error estimation and phase error value of the frequency：
Wherein, fiFor a frequency in broadband system,For frequency fiRange error estimate,For frequency fi Phase error estimate, fsFor sample rate,It isConjugate function,WithIt is that S (k) exists respectivelyWithWhen value, S (k) is xi(n) value after Fourier transformation, xi(n) it is frequency fiSignal after corresponding sampling, N are that the Fourier chosen becomes The points changed, round () represent the computing that rounds up, and real () is real part, and imag () is imaginary part.
Optionally, the correcting filter coefficients calculation block is specifically used for using formula is calculated as below, according to described every The range error estimate and phase error estimation and phase error value of individual frequency, calculate correcting filter coefficient：
Wherein, H1And H (z)2(z) expression formula of the wave filter respectively corrected for I roads and Q roads, M are the frequency chosen Number, fj,fmFor the frequency of selection,WithThe frequency f respectively chosenmRange error estimate and phase miss The estimate of difference, fsFor sample rate.
In hardware realization, frequency NCO, related summing elements and the Fourier transform unit of the above can positioned at scene Program gate array（Field Programmable Gate Array, FPGA）In；More than frequency point parameters computing unit and described Correcting filter coefficients calculation block can be located at digital signal processor（Digital Signal Processor, DSP）In. In addition, when above-mentioned radiofrequency signal is test signal, radio frequency link, radio frequency link can also be included in the correction detection means Signal for frequency NCO to be generated carries out digital-to-analogue conversion（Digital to Analog, DA）, radio frequency be mixed to high band, it is raw Into the radio frequency tone signal of corresponding frequency.That is, the correction detection means can include FPGA and DSP, or, referring to figure 12, the correction detection means 120 can also include FPGA 121 and DSP 123 and radio frequency link 122, after sampling therein Signal refers to the signal after ADC and DC bias compensations, and radio frequency tone signal refers to the radio frequency of a certain frequency of correspondence of generation Signal.
Further, referring to Figure 13, the embodiment of the present invention gives a kind of structural representation of IQ disequilibrium regulatings system, The system 130 includes correction detection means 131 and IQ disequilibrium regulatings device 132；Wherein, correction detection means 131 can join See the embodiment shown in any one of Fig. 8~Figure 12, IQ disequilibrium regulatings device 132 is used for according to the correction detection means output Correcting filter coefficient, to carrying out IQ disequilibrium regulatings, concrete structure can be with as shown in figure 4, correcting filter therein Structure can be as shown in Figure 5.
The present embodiment is by calculating the range error estimate and phase error estimation and phase error value of each frequency in broadband, according to every The range error estimate and phase error estimation and phase error value of individual frequency search the error estimate for the frequency for determining to choose, according to selection Frequency error estimate calculate correcting filter coefficient, due to considered when correcting filter coefficient calculates selection broadband in The parameter of the frequency of all selections, calibration result can be improved.
It is apparent to those skilled in the art that for convenience and simplicity of description, only with above-mentioned each function The division progress of module, can be as needed and by above-mentioned function distribution by different function moulds for example, in practical application Block is completed, i.e., the internal structure of device is divided into different functional modules, to complete all or part of work(described above Energy.The specific work process of the system, apparatus, and unit of foregoing description, it may be referred to corresponding in preceding method embodiment Journey, it will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with Realize by another way.For example, device embodiment described above is only schematical, for example, the module or The division of unit, only a kind of division of logic function, can there are other dividing mode, such as multiple units when actually realizing Or component can combine or be desirably integrated into another system, or some features can be ignored, or not perform.It is another, institute Display or the mutual coupling discussed or direct-coupling or communication connection can be by some interfaces, device or unit INDIRECT COUPLING or communication connection, can be electrical, mechanical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs 's.
In addition, each functional unit in each embodiment of the application can be integrated in a processing unit, can also That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use When, it can be stored in a computer read/write memory medium.Based on such understanding, the technical scheme of the application is substantially The part to be contributed in other words to prior art or all or part of the technical scheme can be in the form of software products Embody, the computer software product is stored in a storage medium, including some instructions are causing a computer Equipment（Can be personal computer, server, or network equipment etc.）Or processor（processor）It is each to perform the application The all or part of step of embodiment methods described.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage （ROM, Read-Only Memory）, random access memory（RAM, Random Access Memory）, magnetic disc or CD Etc. it is various can be with the medium of store program codes.
Described above, above example is only to illustrate the technical scheme of the application, rather than its limitations；Although with reference to before Embodiment is stated the application is described in detail, it will be understood by those within the art that：It still can be to preceding State the technical scheme described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and scope of each embodiment technical scheme of the application.

Claims (12)

  1. A kind of 1. broadband in-phase component quadrature component IQ disequilibrium regulating methods, it is characterised in that including：
    Signal after the sampling according to corresponding to the radiofrequency signal of each frequency in broadband system, calculate the range error of each frequency Estimate and phase error estimation and phase error value；
    The amplitude for the frequency for determining to choose is searched according to the range error estimate of each frequency and phase error estimation and phase error value Error estimate and phase error estimation and phase error value, according to the range error estimate and phase error estimation and phase error of the frequency of the selection Value, correcting filter coefficient is calculated, and the correcting filter coefficient is output to IQ means for correctings so that the IQ corrections dress Put and IQ disequilibrium regulatings are carried out according to the correcting filter coefficient；
    The range error estimate and phase error estimation and phase error value of the frequency according to the selection, calculate correcting filter coefficient Calculation formula be：
    <mrow> <msub> <mi>H</mi> <mn>1</mn> </msub> <mrow> <mo>(</mo> <mi>z</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>m</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>M</mi> </munderover> <mfrac> <mrow> <msubsup> <mi>&amp;Pi;</mi> <mrow> <mi>j</mi> <mo>=</mo> <mn>1</mn> <mo>,</mo> <mi>j</mi> <mo>&amp;NotEqual;</mo> <mi>m</mi> </mrow> <mi>M</mi> </msubsup> <mrow> <mo>(</mo> <mi>z</mi> <mo>+</mo> <msup> <mi>z</mi> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> <mo>-</mo> <mn>2</mn> <mo>&amp;times;</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mn>2</mn> <mi>&amp;pi;</mi> <mfrac> <msub> <mi>f</mi> <mi>j</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> </mrow> </mrow> <mrow> <msubsup> <mi>&amp;Pi;</mi> <mrow> <mi>j</mi> <mo>=</mo> <mn>1</mn> <mo>,</mo> <mi>j</mi> <mo>&amp;NotEqual;</mo> <mi>m</mi> </mrow> <mi>M</mi> </msubsup> <mn>2</mn> <mo>&amp;times;</mo> <mrow> <mo>(</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mn>2</mn> <mi>&amp;pi;</mi> <mfrac> <msub> <mi>f</mi> <mi>j</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>-</mo> <mi>cos</mi> <mn>2</mn> <mi>&amp;pi;</mi> <mfrac> <msub> <mi>f</mi> <mi>m</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> </mrow> </mrow> </mfrac> <mover> <msub> <mi>&amp;alpha;</mi> <mi>m</mi> </msub> <mo>&amp;OverBar;</mo> </mover> </mrow>
    <mrow> <msub> <mi>H</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <mi>z</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mi>&amp;Sigma;</mi> <mrow> <mi>m</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>M</mi> </munderover> <mfrac> <mrow> <msubsup> <mi>&amp;Pi;</mi> <mrow> <mi>j</mi> <mo>=</mo> <mn>1</mn> <mo>,</mo> <mi>j</mi> <mo>&amp;NotEqual;</mo> <mi>m</mi> </mrow> <mi>M</mi> </msubsup> <mrow> <mo>(</mo> <mrow> <mi>z</mi> <mo>+</mo> <msup> <mi>z</mi> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> <mo>-</mo> <mn>2</mn> <mo>&amp;times;</mo> <mi>cos</mi> <mn>2</mn> <mi>&amp;pi;</mi> <mfrac> <msub> <mi>f</mi> <mi>j</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> </mrow> <mo>)</mo> </mrow> </mrow> <mrow> <msubsup> <mi>&amp;Pi;</mi> <mrow> <mi>j</mi> <mo>=</mo> <mn>1</mn> <mo>,</mo> <mi>j</mi> <mo>&amp;NotEqual;</mo> <mi>m</mi> </mrow> <mi>M</mi> </msubsup> <mn>2</mn> <mo>&amp;times;</mo> <mrow> <mo>(</mo> <mrow> <mi>cos</mi> <mn>2</mn> <mi>&amp;pi;</mi> <mfrac> <msub> <mi>f</mi> <mi>j</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>-</mo> <mi>cos</mi> <mn>2</mn> <mi>&amp;pi;</mi> <mfrac> <msub> <mi>f</mi> <mi>m</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> </mrow> <mo>)</mo> </mrow> </mrow> </mfrac> <mover> <msub> <mi>&amp;epsiv;</mi> <mi>m</mi> </msub> <mo>&amp;OverBar;</mo> </mover> <mo>;</mo> </mrow>
    Wherein, H1And H (z)2(z) expression formula of the wave filter respectively corrected for I roads and Q roads, M are the individual of the frequency of selection Number, fj,fmFor the frequency of selection,WithThe frequency f respectively chosenmThe estimate of range error and estimating for phase error Evaluation, fsFor sample rate.
  2. 2. according to the method for claim 1, it is characterised in that also include：
    The range error estimate and phase error estimation and phase error value of each frequency are preserved, to search the frequency for determining to choose Range error estimate and phase error estimation and phase error value.
  3. 3. method according to claim 1 or 2, it is characterised in that the radiofrequency signal is test signal or service signal, When the radiofrequency signal is test signal, methods described also includes：
    Generate the radiofrequency signal.
  4. 4. method according to claim 1 or 2, it is characterised in that the radio frequency according to each frequency in broadband system Signal after being sampled corresponding to signal, the range error estimate and phase error estimation and phase error value of each frequency are calculated, including：
    Corresponding each frequency, the data signal of the frequency is generated using numerically-controlled oscillator NCO；
    To the signal after the data signal sampling corresponding with the frequency of the frequency, carry out correlation and add up, obtain related tired Signal after adding；
    Signal after cumulative to the correlation carries out Fourier transformation, obtains Fourier transformation value corresponding to the frequency；
    According to Fourier transformation value corresponding to the frequency, the range error estimate and phase error estimation and phase error of the frequency are obtained Value.
  5. 5. according to the method for claim 4, it is characterised in that the Fourier transformation value according to corresponding to the frequency, The calculation formula of the range error estimate and phase error estimation and phase error value that obtain the frequency is：
    <mrow> <mover> <mi>&amp;alpha;</mi> <mo>&amp;OverBar;</mo> </mover> <mo>=</mo> <mo>-</mo> <mi>r</mi> <mi>e</mi> <mi>a</mi> <mi>l</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <mn>2</mn> <mo>&amp;times;</mo> <mi>S</mi> <mrow> <mo>(</mo> <mi>N</mi> <mo>-</mo> <mi>r</mi> <mi>o</mi> <mi>u</mi> <mi>n</mi> <mi>d</mi> <mo>(</mo> <mfrac> <msub> <mi>f</mi> <mi>i</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> <mo>)</mo> </mrow> </mrow> <mrow> <mi>S</mi> <mrow> <mo>(</mo> <mi>N</mi> <mo>-</mo> <mi>r</mi> <mi>o</mi> <mi>u</mi> <mi>n</mi> <mi>d</mi> <mo>(</mo> <mfrac> <msub> <mi>f</mi> <mi>i</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> <mo>)</mo> </mrow> <mo>+</mo> <msup> <mi>S</mi> <mo>*</mo> </msup> <mrow> <mo>(</mo> <mi>r</mi> <mi>o</mi> <mi>u</mi> <mi>n</mi> <mi>d</mi> <mo>(</mo> <mfrac> <msub> <mi>f</mi> <mi>i</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> <mo>)</mo> </mrow> </mrow> </mfrac> <mo>)</mo> </mrow> </mrow>
    <mrow> <mover> <mi>&amp;epsiv;</mi> <mo>&amp;OverBar;</mo> </mover> <mo>=</mo> <mo>-</mo> <mi>i</mi> <mi>m</mi> <mi>a</mi> <mi>g</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <mn>2</mn> <mo>&amp;times;</mo> <mi>S</mi> <mrow> <mo>(</mo> <mi>N</mi> <mo>-</mo> <mi>r</mi> <mi>o</mi> <mi>u</mi> <mi>n</mi> <mi>d</mi> <mo>(</mo> <mfrac> <msub> <mi>f</mi> <mi>i</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> <mo>)</mo> </mrow> </mrow> <mrow> <mi>S</mi> <mrow> <mo>(</mo> <mi>N</mi> <mo>-</mo> <mi>r</mi> <mi>o</mi> <mi>u</mi> <mi>n</mi> <mi>d</mi> <mo>(</mo> <mfrac> <msub> <mi>f</mi> <mi>i</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> <mo>)</mo> </mrow> <mo>+</mo> <msup> <mi>S</mi> <mo>*</mo> </msup> <mrow> <mo>(</mo> <mi>r</mi> <mi>o</mi> <mi>u</mi> <mi>n</mi> <mi>d</mi> <mo>(</mo> <mfrac> <msub> <mi>f</mi> <mi>i</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> <mo>)</mo> </mrow> </mrow> </mfrac> <mo>)</mo> </mrow> </mrow>
    Wherein, fiFor a frequency in broadband system,For frequency fiRange error estimate,For frequency fiPhase The estimate of error, fsFor sample rate,It isConjugate function,WithIt is that S (k) exists respectivelyWithWhen value, S (k) is xi(n) Fourier becomes Value after changing, xi(n) it is frequency fiSignal after corresponding sampling, N be choose Fourier transformation points, round () table Show the computing that rounds up, real () is real part, and imag () is imaginary part.
  6. 6. one kind correction detection means, it is characterised in that including：
    Parameter calculating module, for the signal after the sampling according to corresponding to the radiofrequency signal of each frequency in broadband system, calculate The range error estimate and phase error estimation and phase error value of each frequency；
    Correcting filter coefficients calculation block, for the range error estimate and phase error estimation and phase error according to each frequency Value searches the range error estimate and phase error estimation and phase error value for the frequency for determining to choose, according to the amplitude of the frequency of the selection Error estimate and phase error estimation and phase error value, correcting filter coefficient is calculated, and the correcting filter coefficient is output to together Phase component quadrature component IQ means for correctings so that the IQ means for correctings carry out IQ imbalances according to the correcting filter coefficient Correction；
    The correcting filter coefficients calculation block is specifically used for using formula is calculated as below, according to the amplitude of each frequency Error estimate and phase error estimation and phase error value, calculate correcting filter coefficient：
    <mrow> <msub> <mi>H</mi> <mn>1</mn> </msub> <mrow> <mo>(</mo> <mi>z</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mo>&amp;Sigma;</mo> <mrow> <mi>m</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>M</mi> </munderover> <mfrac> <mrow> <msubsup> <mi>&amp;Pi;</mi> <mrow> <mi>j</mi> <mo>=</mo> <mn>1</mn> <mo>,</mo> <mi>j</mi> <mo>&amp;NotEqual;</mo> <mi>m</mi> </mrow> <mi>M</mi> </msubsup> <mrow> <mo>(</mo> <mi>z</mi> <mo>+</mo> <msup> <mi>z</mi> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> <mo>-</mo> <mn>2</mn> <mo>&amp;times;</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mn>2</mn> <mi>&amp;pi;</mi> <mfrac> <msub> <mi>f</mi> <mi>j</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> </mrow> </mrow> <mrow> <msubsup> <mi>&amp;Pi;</mi> <mrow> <mi>j</mi> <mo>=</mo> <mn>1</mn> <mo>,</mo> <mi>j</mi> <mo>&amp;NotEqual;</mo> <mi>m</mi> </mrow> <mi>M</mi> </msubsup> <mn>2</mn> <mo>&amp;times;</mo> <mrow> <mo>(</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mn>2</mn> <mi>&amp;pi;</mi> <mfrac> <msub> <mi>f</mi> <mi>j</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>-</mo> <mi>cos</mi> <mn>2</mn> <mi>&amp;pi;</mi> <mfrac> <msub> <mi>f</mi> <mi>m</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> </mrow> </mrow> </mfrac> <mover> <msub> <mi>&amp;alpha;</mi> <mi>m</mi> </msub> <mo>&amp;OverBar;</mo> </mover> </mrow>
    <mrow> <msub> <mi>H</mi> <mn>2</mn> </msub> <mrow> <mo>(</mo> <mi>z</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mi>&amp;Sigma;</mi> <mrow> <mi>m</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>M</mi> </munderover> <mfrac> <mrow> <msubsup> <mi>&amp;Pi;</mi> <mrow> <mi>j</mi> <mo>=</mo> <mn>1</mn> <mo>,</mo> <mi>j</mi> <mo>&amp;NotEqual;</mo> <mi>m</mi> </mrow> <mi>M</mi> </msubsup> <mrow> <mo>(</mo> <mrow> <mi>z</mi> <mo>+</mo> <msup> <mi>z</mi> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> <mo>-</mo> <mn>2</mn> <mo>&amp;times;</mo> <mi>cos</mi> <mn>2</mn> <mi>&amp;pi;</mi> <mfrac> <msub> <mi>f</mi> <mi>j</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> </mrow> <mo>)</mo> </mrow> </mrow> <mrow> <msubsup> <mi>&amp;Pi;</mi> <mrow> <mi>j</mi> <mo>=</mo> <mn>1</mn> <mo>,</mo> <mi>j</mi> <mo>&amp;NotEqual;</mo> <mi>m</mi> </mrow> <mi>M</mi> </msubsup> <mn>2</mn> <mo>&amp;times;</mo> <mrow> <mo>(</mo> <mrow> <mi>cos</mi> <mn>2</mn> <mi>&amp;pi;</mi> <mfrac> <msub> <mi>f</mi> <mi>j</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>-</mo> <mi>cos</mi> <mn>2</mn> <mi>&amp;pi;</mi> <mfrac> <msub> <mi>f</mi> <mi>m</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> </mrow> <mo>)</mo> </mrow> </mrow> </mfrac> <mover> <msub> <mi>&amp;epsiv;</mi> <mi>m</mi> </msub> <mo>&amp;OverBar;</mo> </mover> <mo>;</mo> </mrow>
    Wherein, H1And H (z)2(z) expression formula of the wave filter respectively corrected for I roads and Q roads, M are the individual of the frequency of selection Number, fj,fmFor the frequency of selection,WithThe frequency f respectively chosenmThe estimate of range error and estimating for phase error Evaluation, fsFor sample rate.
  7. 7. device according to claim 6, it is characterised in that also include：
    Frequency point parameters table module, for preserving the range error estimate and phase error estimation and phase error value of each frequency, so as to The range error that the correcting filter coefficients calculation block obtains the frequency of the selection from the frequency point parameters table module is estimated Evaluation and phase error estimation and phase error value.
  8. 8. the device according to claim 6 or 7, it is characterised in that the radiofrequency signal is test signal or service signal, When the radiofrequency signal is test signal, described device also includes：
    Frequency signal source, for generating the radiofrequency signal, corresponded to so that the parameter calculating module obtains the radiofrequency signal Sampling after signal.
  9. 9. the device according to claim 6 or 7, it is characterised in that the parameter calculating module includes：
    Frequency numerically-controlled oscillator NCO, for corresponding each frequency, using the data signal of the NCO generations frequency；
    Related summing elements, for the signal after the sampling corresponding with the frequency of the data signal to the frequency, carry out phase Close and add up, obtain the signal after related add up；
    Fourier transform unit, for carrying out Fourier transformation to signal of the correlation after cumulative, it is corresponding to obtain the frequency Fourier transformation value；
    Frequency point parameters computing unit, for the Fourier transformation value according to corresponding to the frequency, the amplitude for obtaining the frequency is missed Poor estimate and phase error estimation and phase error value.
  10. 10. device according to claim 9, it is characterised in that the frequency point parameters computing unit is specifically used for using such as Lower calculation formula, according to Fourier transformation value corresponding to the frequency, obtain the range error estimate and phase of the frequency Error estimate：
    <mrow> <mover> <mi>&amp;alpha;</mi> <mo>&amp;OverBar;</mo> </mover> <mo>=</mo> <mo>-</mo> <mi>r</mi> <mi>e</mi> <mi>a</mi> <mi>l</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <mn>2</mn> <mo>&amp;times;</mo> <mi>S</mi> <mrow> <mo>(</mo> <mi>N</mi> <mo>-</mo> <mi>r</mi> <mi>o</mi> <mi>u</mi> <mi>n</mi> <mi>d</mi> <mo>(</mo> <mfrac> <msub> <mi>f</mi> <mi>i</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> <mo>)</mo> </mrow> </mrow> <mrow> <mi>S</mi> <mrow> <mo>(</mo> <mi>N</mi> <mo>-</mo> <mi>r</mi> <mi>o</mi> <mi>u</mi> <mi>n</mi> <mi>d</mi> <mo>(</mo> <mfrac> <msub> <mi>f</mi> <mi>i</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> <mo>)</mo> </mrow> <mo>+</mo> <msup> <mi>S</mi> <mo>*</mo> </msup> <mrow> <mo>(</mo> <mi>r</mi> <mi>o</mi> <mi>u</mi> <mi>n</mi> <mi>d</mi> <mo>(</mo> <mfrac> <msub> <mi>f</mi> <mi>i</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> <mo>)</mo> </mrow> </mrow> </mfrac> <mo>)</mo> </mrow> </mrow>
    <mrow> <mover> <mi>&amp;epsiv;</mi> <mo>&amp;OverBar;</mo> </mover> <mo>=</mo> <mo>-</mo> <mi>i</mi> <mi>m</mi> <mi>a</mi> <mi>g</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <mn>2</mn> <mo>&amp;times;</mo> <mi>S</mi> <mrow> <mo>(</mo> <mi>N</mi> <mo>-</mo> <mi>r</mi> <mi>o</mi> <mi>u</mi> <mi>n</mi> <mi>d</mi> <mo>(</mo> <mfrac> <msub> <mi>f</mi> <mi>i</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> <mo>)</mo> </mrow> </mrow> <mrow> <mi>S</mi> <mrow> <mo>(</mo> <mi>N</mi> <mo>-</mo> <mi>r</mi> <mi>o</mi> <mi>u</mi> <mi>n</mi> <mi>d</mi> <mo>(</mo> <mfrac> <msub> <mi>f</mi> <mi>i</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> <mo>)</mo> </mrow> <mo>+</mo> <msup> <mi>S</mi> <mo>*</mo> </msup> <mrow> <mo>(</mo> <mi>r</mi> <mi>o</mi> <mi>u</mi> <mi>n</mi> <mi>d</mi> <mo>(</mo> <mfrac> <msub> <mi>f</mi> <mi>i</mi> </msub> <msub> <mi>f</mi> <mi>s</mi> </msub> </mfrac> <mo>)</mo> <mo>)</mo> </mrow> </mrow> </mfrac> <mo>)</mo> </mrow> </mrow>
    Wherein, fiFor a frequency in broadband system,For frequency fiRange error estimate,For frequency fiPhase The estimate of error, fsFor sample rate,It isConjugate function,WithIt is that S (k) exists respectivelyWithWhen value, S (k) is xi(n) Fourier becomes Value after changing, xi(n) it is frequency fiSignal after corresponding sampling, N be choose Fourier transformation points, round () table Show the computing that rounds up, real () is real part, and imag () is imaginary part.
  11. 11. device according to claim 9, it is characterised in that
    The frequency NCO, related summing elements and Fourier transform unit are located in on-site programmable gate array FPGA；
    The frequency point parameters computing unit and the correcting filter coefficients calculation block are located in digital signal processor DSP.
  12. A kind of 12. in-phase component quadrature component IQ disequilibrium regulating systems, it is characterised in that including：
    Correction detection means as described in claim any one of 6-11；And
    IQ means for correctings, for the correcting filter coefficient exported according to the correction detection means, to carrying out IQ imbalances school Just.
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