CN108881079A - A kind of I/Q disequilibrium regulating method based on simulated annealing - Google Patents
A kind of I/Q disequilibrium regulating method based on simulated annealing Download PDFInfo
- Publication number
- CN108881079A CN108881079A CN201810514739.2A CN201810514739A CN108881079A CN 108881079 A CN108881079 A CN 108881079A CN 201810514739 A CN201810514739 A CN 201810514739A CN 108881079 A CN108881079 A CN 108881079A
- Authority
- CN
- China
- Prior art keywords
- signal
- road
- amplitude
- precorrection
- simulated annealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03878—Line equalisers; line build-out devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0018—Arrangements at the transmitter end
- H04L2027/002—Arrangements at the transmitter end using feedback from a remote receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Transmitters (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The I/Q disequilibrium regulating method based on simulated annealing that the invention discloses a kind of, including：(1) orthogonal I railway digital baseband signal I and Q railway digital baseband signal Q is generated using Cordic signal generator；(2) after successively carrying out the precorrection of I/Q amplitude, I/Q phase precorrection, DAC digital-to-analogue conversion, low-pass filtering, uppermixing processing to I signal and Q signal, combining treated I signal and Q signal obtains combining signal；(3) to the combining signal successively carry out lower mixing, low-pass filtering, ADC analog-to-digital conversion, from square calculating, after integral is shaken off, obtain uneven degree signal；(4) phase error theta of I signal and Q signal and the road I signal with respect to the road Q signal is adjusted using simulated annealing, so that uneven degree signal value approaches 0；(5) circulation executes step (1) and arrives the process of step (5), until meeting simulated annealing completes search iteration condition.
Description
Technical field
The present invention relates to radio communications and digital processing field, in particular to for utilizing in zero-intermediate-frequency transmitter
The method and device for the self-correcting that simulated annealing carries out the signal unbalance response that same phase I and orthogonal Q is modulated.
Background technique
In the design that microsatellite Radio Frequency Monolithic of new generation integrates answering machine, for further compression volume and function is reduced
Consumption, Analog Baseband and radio frequency processing generally transfer to highly integrated Software Radio platform chip to complete.Due to wherein simulating
The limitation of device, in transmitting link, not necessarily 90 ° of I/Q two paths of signals originally orthogonal of phase shift, and I/Q two
The amplitude gain on road is also not identical.Although high performance analog device can fundamentally inhibit I/Q unbalanced
It influences, but the general volume of these devices is bigger, cost is higher, this will also correspondingly improve the power consumption and volume of equipment.
In addition, high performance analog device can not completely inhibit I/Q imbalance.(such as temperature, frequency in different environments
Rate etc.) inhibit the unbalanced ability of I/Q also can be different, so inhibiting I/Q imbalance in analog domain is not effective approach.And
Numeric field estimation unbalanced to I/Q is real-time, it can corresponding compensation is made for different environment, as long as so setting
Meter has got well the I/Q disequilibrium regulating algorithm of digital baseband, and it is low in analog domain to carry out I/Q imbalance compensation cost ratio in numeric field
Very much, and there is very strong adaptability.
Application publication number is that the patent application of CN103731382A discloses a kind of unbalanced bearing calibration of terminal IQ, is wrapped
Include following steps：A receives the particular calibration signal of terminal transmission or to terminal transmission particular calibration using auxiliary corrective equipment
Signal, there is no IQ imbalances for the transmitting and reception of the auxiliary corrective equipment；B, the signal received according to recipient, meter
The transmitting of calculation terminal or received IQ disequilibrium regulating coefficient；C is held when terminal works normally according to IQ disequilibrium regulating coefficient
Row rectification building-out.The bearing calibration needs auxiliary corrective equipment.
Summary of the invention
The I/Q disequilibrium regulating method based on simulated annealing that the object of the present invention is to provide a kind of, utilizes transmitter
With the feedback loop of receiver radio frequency front end, numeric field using simulated annealing to the unbalanced precorrection parameter of I/Q into
Row closed-loop search, to realize to the unbalanced correction of I/Q.
For achieving the above object, the present invention provides following technical scheme：
A kind of I/Q disequilibrium regulating method based on simulated annealing, signal to be corrected are the amplitude A of the road I signal,
For amplitude B, I the road signal of the road Q signal with respect to the phase error theta of the road Q signal, the road I signal is the same of transmitter modulated signal
Phase component, the road Q signal are the quadrature components of transmitter modulated signal, and the I/Q disequilibrium regulating method includes following step
Suddenly：
(1) orthogonal I railway digital baseband signal I and Q railway digital baseband signal Q is generated using Cordic signal generator；
(2) the pre- school of amplitude is carried out to the baseband signal before the road I signal and the signal correction of the road Q with the amplitude A and amplitude B
Just, the amplitude precorrection output signal I of the road I signal is obtainedAWith the amplitude precorrection output signal Q of the road Q signalA；
(3) with the phase error theta to the amplitude precorrection output signal I of the road I signal and the road Q signalAAnd QACarry out phase
Precorrection obtains the phase precorrection output signal I of the road I signalPWith the phase precorrection output signal Q of the road Q signalP；
(4) to the phase precorrection output signal I of the road I signalPWith the phase precorrection output signal Q of the road Q signalPIt carries out
Digital-to-analogue conversion obtains the analog signal I of the road I signalP(t) and the analog signal Q of the road Q signalP(t)；
(5) to the analog signal I of the road I signalP(t) and the analog signal Q of the road Q signalP(t) orthogonal uppermixing is carried out,
Obtain the road I analog quadrature modulation signal ITX(t) and the road Q analog quadrature modulation signal QTX(t)；
(6) to the road the I analog quadrature modulation signal ITX(t) and the road Q analog quadrature modulation signal QTX(t) it is combined,
Obtain combining signal RFout；
(7) to the combining signal RFoutLower mixing is carried out, analog baseband signal Rx (t) is obtained；
(8) low-pass filtering is first carried out to the analog baseband signal Rx (t), then carries out analog-to-digital conversion, obtain digital baseband
Signal Rx (n)；
(9) a square processing is carried out to the digital baseband signal, obtains quadrature signal Q (n)；
(10) integral is carried out to the quadrature signal Q (n) and shakes off processing, obtain uneven degree signal s (n)；
(11) amplitude A of the road signal, the road the amplitude B and I signal phase of the road Q signal are adjusted using simulated annealing
To the phase error theta of the road Q signal, imbalance degree signal s (n) value is made to approach 0；
(12) circulation executes step (1) and arrives the process of step (11), until meeting simulated annealing completes search iteration
Condition, to complete the unbalanced self-correcting of transmitter I/Q.
Compared with the prior art, the present invention has the beneficial effect that：
The present invention is searched out by the feedback information that the feedback loop of receiver front end provides in conjunction with simulated annealing
Parameter for transmitter I/Q imbalance precorrection improves the performance of transmitting link, and passes through application simulation annealing calculation
Method improves the precision and efficiency of search transmitter I/Q imbalance precorrection parameter.
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 do simply to introduce, 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, can be with root under the premise of not making the creative labor
Other accompanying drawings are obtained according to these attached drawings.
Fig. 1 is the flow chart for the I/Q disequilibrium regulating method based on simulated annealing that one embodiment of the invention provides；
Fig. 2 is opposite using the amplitude A of the simulated annealing adjustment road I signal, the road the amplitude B and I signal of the road Q signal
The method flow diagram of the phase error theta of the road Q signal.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, with reference to the accompanying drawings and embodiments to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are only used to explain the present invention,
And the scope of protection of the present invention is not limited.
As shown in Figure 1, one embodiment of the invention provide a kind of pair of transmitter modulated signal in-phase component and orthogonal point
The corrected method of imbalance between amount, the signal for correction includes three classes signal, and three classes signal is respectively：The road I letter
The phase error theta of number opposite road Q signal, the amplitude A of the road I signal, the amplitude B of the road Q signal.The road I signal is the modulated letter of transmitter
Number in-phase component, the road Q signal is the quadrature component of transmitter modulated signal；The I/Q disequilibrium regulating method includes following step
Suddenly：
S101 generates orthogonal I railway digital baseband signal I and Q railway digital baseband signal using Cordic signal generator
Q。
In this step, the angular frequency of setting Cordic signal projector is w0, then the road the I road the signal I and Q signal Q that generates
Respectively：
S102 carries out the pre- school of amplitude to the baseband signal before the road I signal and the signal correction of the road Q with the amplitude A and amplitude B
Just, the amplitude precorrection output signal I of the road I signal is obtainedAWith the amplitude precorrection output signal Q of the road Q signalA。
Specifically, the amplitude precorrection output signal I of the road I signal is calculated using formula (2)AWith the width of the road Q signal
Spend precorrection output signal QA,
When the first iteration, A=1 and B=1 are left each iteration, and A and B are to obtain after last iterative step (11) adjusts
A and B.
S103, with the phase error theta to the amplitude precorrection output signal I of the road I signal and the road Q signalAAnd QACarry out phase
Position precorrection, obtains the phase precorrection output signal I of the road I signalPWith the phase precorrection output signal Q of the road Q signalP。
Specifically, the phase precorrection output signal I for obtaining the road I signal is calculated using formula (3)PWith the phase of the road Q signal
Position precorrection output signal QP,
When the first iteration, each iteration is left in θ=0, and θ is the θ, I obtained after last iterative step (11) adjustsAAnd QA
The amplitude correction output signal for the road the I signal that step (2) obtains when for current iteration and the amplitude correction of the road Q signal export letter
Number.
S104, to the phase precorrection output signal I of the road I signalPWith the phase precorrection output signal Q of the road Q signalPInto
Row digital-to-analogue conversion obtains the analog signal I of the road I signalP(t) and the analog signal Q of the road Q signalP(t)。
S105, to the analog signal I of the road I signalP(t) and the analog signal Q of the road Q signalP(t) it is just being handed in mixed
Frequently, the road I analog quadrature modulation signal I is obtainedTX(t) and the road Q analog quadrature modulation signal QTX(t)。
Specifically, if modulation angular frequency is wLO, then modulated signal expression be：
S106, to the road the I analog quadrature modulation signal ITX(t) and the road Q analog quadrature modulation signal QTX(t) it is closed
Road obtains combining signal RFout, combining signal RFoutAs transmitting signal；
Wherein, it is combined signal RFoutFor：
Wherein, C (w), sin (α) and cos (α) are respectively indicated：
S107, to the combining signal RFoutLower mixing is carried out, analog baseband signal Rx (t) is obtained.
S108 first carries out low-pass filtering to the analog baseband signal Rx (t), then carries out analog-to-digital conversion, obtains digital base
Band signal Rx (n).
Wherein, digital baseband signal Rx (n) is：
Wherein, w=wLO-wLO’–w0, wLO' it is receiver local oscillator angular frequency.
S109 carries out a square processing to the digital baseband signal, obtains quadrature signal Q (n).
Wherein, quadrature signal Q (n) is：
S110 carries out integral to the quadrature signal Q (n) and shakes off processing, obtains uneven degree signal s (n).
Wherein, uneven degree signal s (n) is：
S111 adjusts the amplitude A of the road I signal, the road the amplitude B and I signal of the road Q signal using simulated annealing
The phase error theta of the opposite road Q signal, makes imbalance degree signal s (n) value approach 0.
Specifically, as shown in Fig. 2, S111 includes：
State initialization：The initial value that A, B and θ is arranged is respectively A=1, B=1 and θ=0, if solution vector x=A, B,
θ }, then initial solution vector x0={ 1,1,0 }, temperature initial value T0=120, Markov process length is set as k, temperature damping because
Son is set as a；
Calculate Markov process：In TkUnder repeat k following operation, until temperature TkReach equilibrium state, that is, completes
The calculating of Markov process：
(a) new feasible solution x ' is generated in the neighborhood of solution x；
(b) it calculates at current x ', the difference DELTA E of the value of uneven degree signal s (n) and old solution objective function；
(c) receive new feasible solution x ' according to probability M, shown in probability M such as formula (10),
Wherein, random [0,1] is the random number in [0,1] section；
Simulated annealing process control：Enable Tk+1=aTk, k=k+1, if meeting convergence criterion, annealing process terminates, no
Then, will start to calculate new Markov process.
S112, circulation execute the process of S101 to S111, until meeting simulated annealing completes search iteration condition, from
And complete the unbalanced self-correcting of transmitter I/Q.
The feedback information that the present embodiment is provided by the feedback loop of receiver front end, in conjunction with simulated annealing, search
Go out the parameter for transmitter I/Q imbalance precorrection, improves the performance of transmitting link, and anneal and calculate by application simulation
Method improves the precision and efficiency of search transmitter I/Q imbalance precorrection parameter.
Technical solution of the present invention and beneficial effect is described in detail in above-described specific embodiment, Ying Li
Solution is not intended to restrict the invention the foregoing is merely presently most preferred embodiment of the invention, all in principle model of the invention
Interior done any modification, supplementary, and equivalent replacement etc. are enclosed, should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of I/Q disequilibrium regulating method based on simulated annealing, signal to be corrected is the amplitude A of the road I signal, Q
For amplitude B, I the road signal of road signal with respect to the phase error theta of the road Q signal, the road I signal is the same phase of transmitter modulated signal
Component, the road Q signal are the quadrature components of transmitter modulated signal, which is characterized in that the I/Q disequilibrium regulating method packet
Include following steps：
(1) orthogonal I railway digital baseband signal I and Q railway digital baseband signal Q is generated using Cordic signal generator；
(2) amplitude precorrection is carried out to the baseband signal before the road I signal and the signal correction of the road Q with the amplitude A and amplitude B, obtained
To the amplitude precorrection output signal I of the road I signalAWith the amplitude precorrection output signal Q of the road Q signalA；
(3) with the phase error theta to the amplitude precorrection output signal I of the road I signal and the road Q signalAAnd QACarry out the pre- school of phase
Just, the phase precorrection output signal I of the road I signal is obtainedPWith the phase precorrection output signal Q of the road Q signalP；
(4) to the phase precorrection output signal I of the road I signalPWith the phase precorrection output signal Q of the road Q signalPCarry out digital-to-analogue
Conversion, obtains the analog signal I of the road I signalP(t) and the analog signal Q of the road Q signalP(t)；
(5) to the analog signal I of the road I signalP(t) and the analog signal Q of the road Q signalP(t) orthogonal uppermixing is carried out, is obtained
The road I analog quadrature modulation signal ITX(t) and the road Q analog quadrature modulation signal QTX(t)；
(6) to the road the I analog quadrature modulation signal ITX(t) and the road Q analog quadrature modulation signal QTX(t) it is combined, obtains
It is combined signal RFout；
(7) to the combining signal RFoutLower mixing is carried out, analog baseband signal Rx (t) is obtained；
(8) low-pass filtering is first carried out to the analog baseband signal Rx (t), then carries out analog-to-digital conversion, obtain digital baseband signal
Rx(n)；
(9) a square processing is carried out to the digital baseband signal, obtains quadrature signal Q (n)；
(10) integral is carried out to the quadrature signal Q (n) and shakes off processing, obtain uneven degree signal s (n)；
(11) using simulated annealing adjust the amplitude A of the road I signal, the road Q signal the road amplitude B and I signal with respect to Q
The phase error theta of road signal makes imbalance degree signal s (n) value approach 0；
(12) circulation executes step (1) and arrives the process of step (11), until meeting simulated annealing completes search iteration condition,
To complete the unbalanced self-correcting of transmitter I/Q.
2. the I/Q disequilibrium regulating method based on simulated annealing as described in claim 1, which is characterized in that the step
Suddenly (2) include：
The amplitude precorrection output signal I of the road I signal is calculated using formula (1)AAmplitude precorrection with the road Q signal exports
Signal QA,
When the first iteration, A=1 and B=1 are left each iteration, and A and B are the A obtained after last iterative step (11) adjusts
And B.
3. the I/Q disequilibrium regulating method based on simulated annealing as described in claim 1, which is characterized in that the step
Suddenly (3) include：
The phase precorrection output signal I for obtaining the road I signal is calculated using formula (2)PIt is exported with the phase precorrection of the road Q signal
Signal QP,
When the first iteration, each iteration is left in θ=0, and θ is the θ, I obtained after last iterative step (11) adjustsAAnd QATo work as
The amplitude correction output signal for the road the I signal that step (2) obtains when preceding iteration and the amplitude correction output signal of the road Q signal.
4. the I/Q disequilibrium regulating method based on simulated annealing as described in claim 1, which is characterized in that step (5)
In, if modulation angular frequency is wLO, then modulated signal expression be：
5. the I/Q disequilibrium regulating method based on simulated annealing as described in claim 1, which is characterized in that step (6)
In, it is combined signal RFoutFor：
Wherein, C (w), sin (α) and cos (α) are respectively indicated：
6. the I/Q disequilibrium regulating method based on simulated annealing as described in claim 1, which is characterized in that the step
Suddenly (11) include：
State initialization：The initial value that A, B and θ is arranged is respectively A=1, B=1 and θ=0, if solution vector x={ A, B, θ }, then
Initial solution vector x0={ 1,1,0 }, temperature initial value T0=120, Markov process length is set as k, and temperature damping's factor is set as
a；
Calculate Markov process：In TkUnder repeat k following operation, until temperature TkReach equilibrium state, that is, completes primary
The calculating of Markov process：
(a) new feasible solution x ' is generated in the neighborhood of solution x；
(b) it calculates at current x ', the difference DELTA E of the value of uneven degree signal s (n) and old solution objective function；
(c) receive new feasible solution x ' according to probability M, shown in probability M such as formula (3),
Wherein, random [0,1] is the random number in [0,1] section；
Simulated annealing process control：Enable Tk+1=aTk, k=k+1, if meeting convergence criterion, annealing process terminates, otherwise, will
Start to calculate new Markov process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810514739.2A CN108881079B (en) | 2018-05-25 | 2018-05-25 | I/Q imbalance correction method based on simulated annealing algorithm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810514739.2A CN108881079B (en) | 2018-05-25 | 2018-05-25 | I/Q imbalance correction method based on simulated annealing algorithm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108881079A true CN108881079A (en) | 2018-11-23 |
| CN108881079B CN108881079B (en) | 2020-04-28 |
Family
ID=64333782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810514739.2A Active CN108881079B (en) | 2018-05-25 | 2018-05-25 | I/Q imbalance correction method based on simulated annealing algorithm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108881079B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110228826A1 (en) * | 2010-03-19 | 2011-09-22 | Fujitsu Limited | Iq imbalance correction method in a wireless communication device including a quadrature modulation/demodulation function |
| CN102437983A (en) * | 2011-10-27 | 2012-05-02 | 安徽省菲特科技股份有限公司 | Method and device for self-correcting emitting end I/Q modulation imbalance |
| CN103731382A (en) * | 2012-10-12 | 2014-04-16 | 北京信威通信技术股份有限公司 | Method for correcting IQ imbalance of terminal |
| CN104184696A (en) * | 2013-05-22 | 2014-12-03 | 瑞昱半导体股份有限公司 | Communication system correction method and communication system correction device |
| CN104811215A (en) * | 2015-04-14 | 2015-07-29 | 华南理工大学 | IQ unbalance compensation device and method |
| US20160087657A1 (en) * | 2014-01-28 | 2016-03-24 | Scintera Networks Llc | Adaptively Controlled Pre-Distortion Circuits for RF Power Amplifiers |
-
2018
- 2018-05-25 CN CN201810514739.2A patent/CN108881079B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110228826A1 (en) * | 2010-03-19 | 2011-09-22 | Fujitsu Limited | Iq imbalance correction method in a wireless communication device including a quadrature modulation/demodulation function |
| CN102437983A (en) * | 2011-10-27 | 2012-05-02 | 安徽省菲特科技股份有限公司 | Method and device for self-correcting emitting end I/Q modulation imbalance |
| CN103731382A (en) * | 2012-10-12 | 2014-04-16 | 北京信威通信技术股份有限公司 | Method for correcting IQ imbalance of terminal |
| CN104184696A (en) * | 2013-05-22 | 2014-12-03 | 瑞昱半导体股份有限公司 | Communication system correction method and communication system correction device |
| US20160087657A1 (en) * | 2014-01-28 | 2016-03-24 | Scintera Networks Llc | Adaptively Controlled Pre-Distortion Circuits for RF Power Amplifiers |
| CN104811215A (en) * | 2015-04-14 | 2015-07-29 | 华南理工大学 | IQ unbalance compensation device and method |
Non-Patent Citations (2)
| Title |
|---|
| R.A. RUTENBAR: ""Simulated annealing algorithms: an overview"", 《IEEE CIRCUITS AND DEVICES MAGAZINE》 * |
| 戚秀真: ""零中频发射机设计与实现"", 《电子科技》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108881079B (en) | 2020-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101304395B (en) | Zero intermediate frequency transmitter as well as method and apparatus for correcting sideband and local oscillation leakage thereof | |
| US9491010B2 (en) | Phase noise tracking and reduction | |
| CN104580060B (en) | A kind of the digital pre-distortion means for correcting and method of the distortion of IQ imbalances | |
| KR100539874B1 (en) | Method and apparatus for self-calibrating in a mobile transceiver | |
| CN104079243B (en) | Method of calibrating an envelope tracking system, power voltage modulation method and apparatus thereof | |
| US8885692B2 (en) | Estimation of intentional phase shift in a calibration apparatus | |
| JP4618445B2 (en) | Linearity evaluation method using integration processing weighted by probability density function, and circuit simulator, evaluation apparatus, communication circuit, and program using the same | |
| US20060067425A1 (en) | Transmitter and transmission method | |
| CN109428616B (en) | Apparatus and method for radio frequency transmitter to compensate for local oscillator leakage | |
| CN102843321A (en) | Devices of IQ mismatch calibration, and methods thereof | |
| CN101364968A (en) | Radio transmitter using cartesian loop | |
| CA2521739A1 (en) | Inphase/quadrature phase imbalance compensation | |
| CN106936519A (en) | A kind of signal calibration method, device and signal processing system | |
| CN108347285A (en) | A kind of full bandwidth zero-intermediate-frequency transmitter signal correction system and method | |
| CN105282062B (en) | Unmatched bearing calibration and device between conveyer/receiver signal path | |
| JP2006527530A (en) | Method and system for suppressing carrier leak | |
| US7039130B2 (en) | RF receiver phase correction circuit using cordic and vector averaging functions and method of operation | |
| Windisch et al. | Adaptive I/Q imbalance compensation in low-IF transmitter architectures | |
| CN107395294A (en) | A kind of emitter radio frequency non-ideal characteristic antidote | |
| CN104184696B (en) | Communication system bearing calibration and communication system means for correcting | |
| CN103095617A (en) | High-frequency signal processor and wireless communication system | |
| CN102833198B (en) | IQ (in-phase/quadrature-phase) imbalance correcting system and method for zero-intermediate-frequency architecture | |
| CN108881079A (en) | A kind of I/Q disequilibrium regulating method based on simulated annealing | |
| US20070027649A1 (en) | Method and calibration system for iq dc offset and imbalance calibration by utilizing analytic formulas to quickly determined desired compensation values | |
| Debaillie et al. | Calibration of direct-conversion transceivers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |