CN103731382B - A kind of unbalanced bearing calibrations of terminal IQ - Google Patents
A kind of unbalanced bearing calibrations of terminal IQ Download PDFInfo
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- CN103731382B CN103731382B CN201210387145.2A CN201210387145A CN103731382B CN 103731382 B CN103731382 B CN 103731382B CN 201210387145 A CN201210387145 A CN 201210387145A CN 103731382 B CN103731382 B CN 103731382B
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Abstract
The present invention proposes a kind of unbalanced bearing calibrations of terminal IQ, comprises the following steps：A, using auxiliary corrective equipment, the particular calibration signal of receiving terminal transmitting or to terminal transmission particular calibration signal, the transmitting and reception of the auxiliary corrective equipment are uneven in the absence of IQ；B, according to the signal that recipient receives, the IQ disequilibrium regulating coefficients of transmitting or the reception of computing terminal；C, during terminal normal work, rectification building-out is performed according to IQ disequilibrium regulatings coefficient.The present invention simplifies the handling process of terminal while IQ disequilibrium regulatings are realized, has saved cost overhead.
Description
Technical field
The present invention relates to field of signal processing, more particularly to a kind of unbalanced bearing calibrations of terminal IQ.
Background technology
In a communications system, in radio frequency or intermediate-freuqncy signal being down converted into baseband signal and its inverse process, can separate and draw
Enter component in the same direction（I）With quadrature component（Q）, I/Q components are identical using gain and phase differs 90 degree of cosine and sine wave reaches
Into.Because frequency reducing and raising frequency are during analog domain is performed, there is the error of gain and phase between cosine and sine wave, from
And IQ imbalances are introduced, this IQ imbalances can directly result in reception and the deterioration of transmitting chain signal, influence communication quality.
It is existing to concentrate on end side for the unbalanced bearing calibrations of IQ, increase correcting circuit typically by hardware
Or combine the corresponding correcting algorithm completion unbalanced corrections of IQ of software.These methods, can be in terminal while correction is realized
Side introduces the handling process of complexity and the expense of hardware cost, influences the treatment effeciency and product of terminal to realize.
The content of the invention
For above-mentioned deficiency, the present invention proposes a kind of unbalanced bearing calibrations of terminal IQ, comprises the following steps：
A, using auxiliary corrective equipment, the particular calibration signal of receiving terminal transmitting or to terminal transmission particular calibration letter
Number, the transmitting and reception of the auxiliary corrective equipment are uneven in the absence of IQ；
B, according to the signal that recipient receives, the IQ disequilibrium regulating coefficients of transmitting or the reception of computing terminal；
C, during terminal normal work, rectification building-out is performed according to IQ disequilibrium regulatings coefficient.
Preferably, the reception IQ disequilibrium regulatings for terminal of the invention, each step is specially：
In step a, auxiliary corrective equipment is to terminal transmission simple signal；
In step b, the reception signal of terminal is done into FFT, P is the corresponding frequency point information of actual frequency for receiving signal, and N is
The corresponding frequency point information of image frequency of signal is received, then the reception IQ disequilibrium regulating coefficients E of computing terminalrAnd Dr：
In step c, during terminal normal work, according to ErAnd DrThe docking collection of letters number carries out IQ disequilibrium regulating compensation：Ircorr
(t)=(Er+1)Ir(t), Qrcorr(t)=Qr(t)+DrIr(t), wherein IrT () is the component in the same direction for receiving signal, IrcorrT () is
The component in the same direction of the reception signal after correction, QrT () is the quadrature component for receiving signal, QrcorrT () is the reception letter after correction
Number quadrature component.
Preferably, the transmitting IQ disequilibrium regulatings for terminal of the invention, each step is specially：
In step a, terminal launches two-frequency signal to auxiliary corrective equipment, and the two-frequency signal is identical comprising amplitude, frequency
It is ω0And ω1Two simple signals, ω1=2 ω0；
In step b, the reception signal of auxiliary corrective equipment is done into FFT, P0、P1Respectively frequency is ω0、ω1Reception letter
Number the corresponding frequency point information of actual frequency, N0、N1Respectively frequency is ω0、ω1Reception signal image frequency it is corresponding
Frequency point information, then the transmitting IQ disequilibrium regulating coefficients E of computing terminaltAnd Dt： Wherein
In step c, during terminal normal work, according to EtAnd DtIQ disequilibrium regulating compensation is carried out to transmission signal：Itcorr
(t)=(1+Et)It(t), Qtcorr(t)=Qt(t)+DtIt(t), wherein ItT () is the component in the same direction of transmission signal, ItcorrT () is
The component in the same direction of the transmission signal after correction, QtT () is the quadrature component of transmission signal, QtcorrT () is the transmitting letter after correction
Number quadrature component.
The orthogonality for carrying out the i/q signal of the reception of the terminal after IQ disequilibrium regulatings is verified below.
Auxiliary corrective equipment is ω to terminal transmission frequency0Simple signal, in the ideal case, the reception signal of terminal
I/Q expression formulas be：
S (t)=I (t)+jQ (t),
Wherein mutually orthogonal I/Q two paths of signals is expressed as:
I (t)=Acos (ω0t)
Q(t)=Asin(ω0t)
Because the transmitting of auxiliary corrective equipment and receives link are uneven in the absence of IQ, then IQ in trimming process is uneven
Weighing apparatus factor is drawn by end side.The signal I/Q two-way that terminal is received can be expressed as：
Ir(t)=(1+α)Acos(ω0t)
Qr(t)=Asin(ω0t+ε)
Wherein, α is introduced by amplitude imbalance, and ε is introduced by unbalance in phase.
According to Euler's formula, being derived by the signal that terminal receives is：
The signal that terminal is received is done into FFT, it is contemplated that when being FFT sampled point might not from t value, but
May be from the t+ τ moment, then above formula is changed into：
Due to the corresponding frequency point information of actual frequency that P is reception signal, N is the corresponding frequency of image frequency for receiving signal
Point information, makes γ=ω0τ, then have：
The then reception IQ disequilibrium regulating coefficients E of terminalrAnd DrFor：
During terminal normal work, according to ErAnd DrAfter the docking collection of letters number carries out IQ disequilibrium regulating compensation, the I/Q after correction
Two paths of signals is：
As can be seen from the above equation, completely orthogonal through the reception signal after IQ disequilibrium regulatings, the amplitude after correction is Acos
ε, can effectively solve to receive the unbalanced problems of IQ.
Likewise, being verified to the orthogonality for carrying out the i/q signal of the terminal transmission after IQ disequilibrium regulatings below.
Terminal is identical to auxiliary corrective equipment transmitting amplitude, and frequency is ω0And ω1=2 ω0Two tone signals, without
The terminal transmission signal such as following formula of IQ disequilibrium regulatings is represented：
St=It(t)+jQt(t)
Wherein, I/Q two-way is expressed as：
It(t)=(1+α)Acos(ω0t)
Qt(t)=Asin(ω0t+ε)
Carry out the transmission signal of self terminal and have passed through certain phase place because auxiliary corrective equipment is received, then aid in school
The signal that positive equipment is received can be expressed as：
Due to P0For frequency is ω0Reception signal the corresponding frequency point information of actual frequency, N0For frequency is ω0Connect
The corresponding frequency point information of image frequency of the collection of letters number, then have：
Similarly, due to P1For frequency is ω1Reception signal the corresponding frequency point information of actual frequency, N1For frequency is ω1
Reception signal the corresponding frequency point information of image frequency, then have：
Then：
Then have：
The then transmitting IQ disequilibrium regulating coefficients E of terminaltAnd DtFor：
During terminal normal work, according to EtAnd DtAfter IQ disequilibrium regulating compensation is carried out to transmission signal, the I/Q after correction
Two paths of signals is：
Itcorr(t)=(1+Et)It(t)
=(1+Et)(1+α)Acos(ω0t)
=Acosεcos(ω0t)
Qtcorr(t)=Qt(t)+DtIt(t)
=Asin(ω0t+ε)+Dt(1+α)Acos(ω0t)
=Acosεsin(ω0t)
As can be seen from the above equation, completely orthogonal through the transmission signal after IQ disequilibrium regulatings, the amplitude after correction is Acos
ε, equally efficiently solves the transmitting unbalanced problems of IQ.
The present invention is received and transmitting particular calibration signal by by auxiliary corrective equipment, coordinating terminal, complete paired terminal
Reception and transmitting IQ disequilibrium regulating coefficients calculating, terminal only need to be in course of normal operation, and it is right to be performed on I/Q components
The rectification building-out of corresponding fixed coefficient.Its advantage is essentially consisted in while realizing IQ disequilibrium regulatings, simplifies terminal
Handling process, has saved cost overhead.Additionally, the acquisition computational methods of IQ disequilibrium regulatings coefficient of the invention, also very simple
It is single quick.
Brief description of the drawings
Fig. 1 is the auxiliary equipment and terminal connection diagram of the embodiment of the present invention；
Fig. 2 is that the terminal of the embodiment of the present invention receives IQ disequilibrium regulating process schematics；
Fig. 3 is the terminal transmission IQ disequilibrium regulating process schematics of the embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is described in further details by specific embodiment.
The present embodiment first connects PC, auxiliary corrective equipment, router, terminal to be corrected as shown in Figure 1, and PC leads to
The network interface for crossing router is connected with auxiliary corrective equipment and terminal, control auxiliary corrective equipment and the reception eated dishes without rice or wine of terminal and
Transmitting calibration signal.
It is as follows that the present embodiment carries out the reception unbalanced trimming processes of IQ to terminal：
To terminal transmission tone signal, FFT is in the docking collection of letters number to auxiliary corrective equipment after terminal receives tone signal, remembers
The corresponding frequency point information of actual frequency for receiving signal is P, and the corresponding frequency point information of image frequency for receiving signal is N, then
The reception IQ disequilibrium regulating coefficients E of terminal is calculated according to the following equationrAnd Dr：
Terminal is calculated reception correction coefficient ErAnd DrAfterwards, in recorded terminal flash.During terminal normal work, read
Reception IQ disequilibrium regulating coefficients E in itself flashrAnd Dr, according to the reception process shown in Fig. 2, existed according to following formula
Numeric field carries out receiving IQ imbalance compensations.
Ircorr(t)=(Er+1)Ir(t), Qrcorr(t)=Qr(t)+DrIr(t),
IrT () is the component in the same direction of terminal received signals, IrcorrT () is the component in the same direction of the reception signal after correction, Qr
T () is the quadrature component of terminal received signals, QrcorrT () is the quadrature component of the reception signal after correction.
It is as follows that the present embodiment carries out the transmitting unbalanced trimming processes of IQ to terminal：
PC eats dishes without rice or wine to launch a two-frequency signal by network interface control terminal, and the two-frequency signal is identical comprising amplitude, frequency
It is ω0And ω1=2 ω0Two simple signals, while PC by network interface control auxiliary corrective equipment eat dishes without rice or wine receive signal, here
Two simple signals are combined into a two-frequency signal to send together, are in order that obtaining the ginseng such as two time delays of simple signal, skews
Number is consistent, to ensure the accuracy of calibration effect.
FFT is in the docking collection of letters number after auxiliary corrective equipment receives signal, and note frequency is ω0Reception signal actual frequency
The corresponding frequency point information of rate is P0, frequency is ω0Reception signal the corresponding frequency point information of image frequency be N0, frequency is ω1
Reception signal the corresponding frequency point information of actual frequency be P1, frequency is ω1Reception signal the corresponding frequency of image frequency
Information is N1, the transmitting IQ disequilibrium regulating coefficients E of terminal is then calculated according to the following equationtAnd Dt：
Wherein
Auxiliary corrective equipment is calculated transmitting correction coefficient EtAnd DtAfterwards, result of calculation is fed back into PC by network interface,
Transmitting correction coefficient is directly passed to terminal by PC sides without calculating by network interface, after terminal is received, in recorded flash.
During terminal normal work, the transmitting IQ disequilibrium regulating coefficients E in itself flash is readtAnd Dt, according to shown in Fig. 3
Emission process, according to following formula numeric field carry out launch IQ imbalance compensations.
Itcorr(t)=(1+Et)It(t), Qtcorr(t)=Qt(t)+DtIt(t),
ItT () is the component in the same direction of terminal transmission signal, ItcorrT () is the component in the same direction of the transmission signal after correction, Qt
T () is the quadrature component of terminal transmission signal, QtcorrT () is the quadrature component of the transmission signal after correction.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (2)
1. a kind of unbalanced bearing calibrations of terminal IQ, comprise the following steps：
A, using auxiliary corrective equipment, to terminal transmission particular calibration signal, the transmitting and reception of the auxiliary corrective equipment are equal
It is uneven in the absence of IQ；
B, according to the signal that recipient receives, the reception IQ disequilibrium regulating coefficients of computing terminal；
C, during terminal normal work, rectification building-out is performed according to IQ disequilibrium regulatings coefficient；Characterized in that, connecing for terminal
IQ disequilibrium regulatings are received, each step is specially：
Step a, auxiliary corrective equipment is to terminal transmission simple signal；
Step b, FFT is by the reception signal of terminal, and P is the corresponding frequency point information of actual frequency for receiving signal, and N believes to receive
Number the corresponding frequency point information of image frequency, the then reception IQ disequilibrium regulating coefficients E of computing terminalrAnd Dr：
Step c, during terminal normal work, according to ErAnd DrThe docking collection of letters number carries out IQ disequilibrium regulating compensation：Ircorr(t)=(Er
+1)Ir(t), Qrcorr(t)=Qr(t)+DrIr(t), wherein IrT () is the component in the same direction for receiving signal, IrcorrT () is Ir(t) school
The component in the same direction of the reception signal after just, QrT () is the quadrature component for receiving signal, QrcorrT () is the reception signal after correction
Quadrature component.
2. a kind of unbalanced bearing calibrations of terminal IQ, comprise the following steps：
A, using auxiliary corrective equipment, the particular calibration signal of receiving terminal transmitting and connects the transmitting of the auxiliary corrective equipment
Receive uneven in the absence of IQ；
B, according to the signal that recipient receives, the transmitting IQ disequilibrium regulating coefficients of computing terminal；
C, during terminal normal work, rectification building-out is performed according to IQ disequilibrium regulatings coefficient；Characterized in that, for the hair of terminal
IQ disequilibrium regulatings are penetrated, each step is specially：
Step a, terminal launches two-frequency signal to auxiliary corrective equipment, and the two-frequency signal is identical comprising amplitude, and frequency is ω0With
ω1Two simple signals, ω1=2 ω0；
Step b, FFT, P are by the reception signal of auxiliary corrective equipment0、P1Respectively frequency is ω0、ω1Reception signal reality
The corresponding frequency point information of border frequency, N0、N1Respectively frequency is ω0、ω1Reception signal image frequency corresponding frequency letter
Cease, then the transmitting IQ disequilibrium regulating coefficients E of computing terminaltAnd Dt： Wherein
Step c, during terminal normal work, according to EtAnd DtIQ disequilibrium regulating compensation is carried out to transmission signal：Itcorr(t)=(1+
Et)It(t), Qtcorr(t)=Qt(t)+DtIt(t), wherein ItT () is the component in the same direction of transmission signal, ItcorrT () is for correction after
Transmission signal component in the same direction, QtT () is the quadrature component of transmission signal, Qtcorr(t) be correction after transmission signal just
Hand over component.
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| CN201210387145.2A CN103731382B (en) | 2012-10-12 | 2012-10-12 | A kind of unbalanced bearing calibrations of terminal IQ |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104980376A (en) * | 2015-06-17 | 2015-10-14 | 江苏中兴微通信息科技有限公司 | Transmitter-receiver joint frequency selective IQ imbalance estimation and compensation method for self-loopback structures |
| CN107919905B (en) * | 2016-10-10 | 2020-05-22 | 富士通株式会社 | Device and method for measuring unbalance of frequency response characteristics of optical receiver |
| CN108574527B (en) * | 2017-03-13 | 2021-01-12 | 富士通株式会社 | In-phase path and orthogonal path unbalance measuring method and device |
| CN108881079B (en) * | 2018-05-25 | 2020-04-28 | 浙江大学 | I/Q imbalance correction method based on simulated annealing algorithm |
| CN113132028B (en) * | 2021-04-25 | 2022-07-15 | 成都天奥测控技术有限公司 | IQ correction method for originating terminal |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5771263A (en) * | 1996-01-08 | 1998-06-23 | Hitachi Denshi Kabushiki Kaisha | Communication system control method and communication system using the method |
| US6763227B2 (en) * | 2001-11-07 | 2004-07-13 | Texas Instruments Incorporated | Systems and methods for modulator calibration |
| CN1535498A (en) * | 2001-07-25 | 2004-10-06 | 因芬尼昂技术股份公司 | Method and device for compensating phase error in receiver and/or transmitter system with I/Q interface |
| CN1571270A (en) * | 2003-04-02 | 2005-01-26 | 三星电子株式会社 | Self-calibrating apparatus and method in a mobile transceiver |
| CN1984101A (en) * | 2005-12-13 | 2007-06-20 | 大唐移动通信设备有限公司 | Method for aligning receiver I/Q in TDD system and receiver-transmitter platform |
| CN101461201A (en) * | 2006-06-06 | 2009-06-17 | 高通股份有限公司 | Fast in-phase and quadrature imbalance calibration |
| US7773967B2 (en) * | 2007-09-06 | 2010-08-10 | Francis J. Smith | Multi-mode—multi-band direct conversion receiver with complex I and Q channel interference mitigation processing for cancellation of intermodulation products |
| CN102396199A (en) * | 2009-03-20 | 2012-03-28 | 瑞典信号处理设备公司 | Methods and apparatuses for compensation of i/q imbalance |
-
2012
- 2012-10-12 CN CN201210387145.2A patent/CN103731382B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5771263A (en) * | 1996-01-08 | 1998-06-23 | Hitachi Denshi Kabushiki Kaisha | Communication system control method and communication system using the method |
| CN1535498A (en) * | 2001-07-25 | 2004-10-06 | 因芬尼昂技术股份公司 | Method and device for compensating phase error in receiver and/or transmitter system with I/Q interface |
| US6763227B2 (en) * | 2001-11-07 | 2004-07-13 | Texas Instruments Incorporated | Systems and methods for modulator calibration |
| CN1571270A (en) * | 2003-04-02 | 2005-01-26 | 三星电子株式会社 | Self-calibrating apparatus and method in a mobile transceiver |
| CN1984101A (en) * | 2005-12-13 | 2007-06-20 | 大唐移动通信设备有限公司 | Method for aligning receiver I/Q in TDD system and receiver-transmitter platform |
| CN101461201A (en) * | 2006-06-06 | 2009-06-17 | 高通股份有限公司 | Fast in-phase and quadrature imbalance calibration |
| US7773967B2 (en) * | 2007-09-06 | 2010-08-10 | Francis J. Smith | Multi-mode—multi-band direct conversion receiver with complex I and Q channel interference mitigation processing for cancellation of intermodulation products |
| CN102396199A (en) * | 2009-03-20 | 2012-03-28 | 瑞典信号处理设备公司 | Methods and apparatuses for compensation of i/q imbalance |
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