CN101741789B - Phase correction circuit and phase correction method thereof - Google Patents
Phase correction circuit and phase correction method thereof Download PDFInfo
- Publication number
- CN101741789B CN101741789B CN200810171065A CN200810171065A CN101741789B CN 101741789 B CN101741789 B CN 101741789B CN 200810171065 A CN200810171065 A CN 200810171065A CN 200810171065 A CN200810171065 A CN 200810171065A CN 101741789 B CN101741789 B CN 101741789B
- Authority
- CN
- China
- Prior art keywords
- phase
- signal
- module
- phase correction
- correction
- 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.)
- Active
Links
Images
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The invention relates to a phase correction circuit which comprises at least one group of signal processing modules, at least two phase correction modules, a phase detection module and a filter module, wherein the output end of the first-phase correction module is coupled to the input ends of the first group of signal processing modules; the input end of the second-phase correction module is coupled to the output ends of the first group of signal processing modules; and the first group of signal processing modules receive the corrected signals of the first-phase correction module at the input ends and generate the processed signals of the first group of signal processing modules at the output ends. The phase detection module generates phase error signals according to the corrected signals of an M-phase correction module. The filter module is used for generating at least one first-phase correction signal and a second-phase correction signal according to the phase error signals.
Description
Technical field
The present invention is relevant phase-correcting circuit, refers to a kind of phase-correcting circuit and bearing calibration thereof that is arranged at receiving terminal in the communication system especially.
Background technology
In passband (pass-band) communication system; The transmission end can be loaded in carrier wave (carrier) with fundamental frequency signal (baseband signal) through the technology of modulation (modulation) and upward produce modulation back signal, and modulation back signal arrives receiving terminal afterwards through channel (channel).And generally can do demodulation (demodulation) to the signal that receives carrier wave is removed or reduce carrier frequency at receiving terminal; To make things convenient for the processing of follow-up signal; Yet; The carrier wave of transmission end and receiving terminal usually can be not synchronous fully; Therefore have carrier frequency offset (carrier frequency offset) and carrier phase deviation effects such as (carrier phase offset) and produce, therefore, receiving terminal can have carrier wave and recover (carrier recovery) circuit to overcome above-mentioned effect.
General carrier recovery circuit includes signal processing module, phase correction module, phase detectors, filter and carrier phase accumulator.Phase correction module wherein be according to designer's consideration determining set position, that is phase correction module can be arranged at before or after the signal processing module.Yet; If phase correction module is arranged at before the signal processing module; That is be used for proofreading and correct input signal, then for changing phase place faster, its feedback signal and input signal have the deviation on the phase place; That is can't proofread and correct the carrier phase of input signal really, and the problem on the trace (tracking) is arranged; On the other hand, if phase correction module is arranged at after the signal processing module, though there is not the problem on the trace, handled signal still can have the carrier phase deviation, the effect when therefore in design, needing to consider to have the carrier phase deviation to exist.
Summary of the invention
Therefore, one of the object of the invention is to provide a kind of phase-correcting circuit and method for correcting phase thereof with a plurality of phase correction module, to solve the above problems.
According to one embodiment of the invention, a kind of phase-correcting circuit includes at least one group of signal processing module, at least 2 phase correction module, phase detecting module and filtration modules.The output of the 1st phase correction module is coupled to the input of the 1st group of signal processing module; The input of the 2nd phase correction module is coupled to the output of the 1st group of signal processing module, signal the 1st group of signal processing module receives signal after the correction of the 1st phase correction module and produce the processing of the 1st group of signal processing module in output in input after.This phase detecting module is used for producing phase error signal according to signal after the correction of M phase correction module, and wherein M is the positive integer more than or equal to 2.This filtration module is used for according to this phase error signal to produce at least one the 1st phase correction signal and one the 2nd phase correction signal; Wherein the 1st phase correction module according to the 1st phase correction signal with the correction that produces the 1st phase correction module after signal, and the 2nd phase correction module according to the 2nd phase correction signal with the correction that produces the 2nd phase correction module after signal.
According to another embodiment of the present invention, a kind of method for correcting phase includes: at least one group of signal processing module is provided, and wherein each group signal processing module comprises at least one signal processing module; At least 2 phase correction module are provided; Wherein the output of the 1st phase correction module is coupled to the input of the 1st group of signal processing module; The input of the 2nd phase correction module is coupled to the output of the 1st group of signal processing module, signal the 1st group of signal processing module receives signal after the correction of the 1st phase correction module and produce the processing of the 1st group of signal processing module in output in input after; Produce phase error signal according to signal after the correction of M phase correction module, wherein M is the positive integer more than or equal to 2; And according to this phase error signal to produce at least one the 1st phase correction signal and one the 2nd phase correction signal; Wherein the 1st phase correction module according to the 1st phase correction signal with the correction that produces the 1st phase correction module after signal, and the 2nd phase correction module according to the 2nd phase correction signal with the correction that produces the 2nd phase correction module after signal.
According to another embodiment of the present invention, a kind of phase-correcting circuit includes: at least one group of signal processing module, and each group signal processing module comprises a signal processing module; At least 2 phase correction module; Wherein the output of the 1st phase correction module is coupled to the input of the 1st group of signal processing module; The input of the 2nd phase correction module is coupled to the output of the 1st group of signal processing module, signal the 1st group of signal processing module receives signal after the correction of the 1st phase correction module and produce the processing of the 1st group of signal processing module in output in input after; Phase detecting module is used for producing phase error signal according to signal after the correction of M phase correction module, and wherein M is the positive integer more than or equal to 2; And filtration module, be coupled to this phase detecting module, be used for according to this phase error signal to produce at least one the 1st phase correction signal and one the 2nd phase correction signal; Wherein the 1st phase correction module according to the 1st phase correction signal with the correction that produces the 1st phase correction module after signal, and the 2nd phase correction module according to the 2nd phase correction signal with the correction that produces the 2nd phase correction module after signal.
According to another embodiment of the present invention, a kind of method for correcting phase includes: at least one group of signal processing module is provided, and wherein each group signal processing module comprises a signal processing module; At least 2 phase correction module are provided; Wherein the output of the 1st phase correction module is coupled to the input of the 1st group of signal processing module; The input of the 2nd phase correction module is coupled to the output of the 1st group of signal processing module, signal the 1st group of signal processing module receives signal after the correction of the 1st phase correction module and produce the processing of the 1st group of signal processing module in output in input after; Produce phase error signal according to signal after the correction of M phase correction module, wherein M is the positive integer more than or equal to 2; And according to this phase error signal to produce at least one the 1st phase correction signal and one the 2nd phase correction signal; Wherein the 1st phase correction module according to the 1st phase correction signal with the correction that produces the 1st phase correction module after signal, and the 2nd phase correction module according to the 2nd phase correction signal with the correction that produces the 2nd phase correction module after signal.
Description of drawings
Fig. 1 is the sketch map according to the phase-correcting circuit that is applied to 2 groups of signal processing modules of first embodiment of the invention.
Fig. 2 corresponds to the sketch map of phase error signal different frequency section for phase correction signal.
Fig. 3 is the sketch map of filtration module shown in Figure 1.
Fig. 4 is the sketch map according to the phase-correcting circuit that is applied to 2 groups of signal processing modules of second embodiment of the invention.
[main element label declaration]
| 200、500 | Phase-correcting |
| 202、204、502、504 | |
| 210、212、510、512 | |
| 220、520 | |
| 230、530 | |
| 410、532、534 | |
| 420、432 | |
| 424、430 | |
| 422、432 | Delay cell |
Embodiment
Fig. 1 is the sketch map according to the phase-correcting circuit 200 that is applied to 2 groups of signal processing modules 202 and 204 of one embodiment of the invention, and wherein each group signal processing module comprises at least one signal processing module.As shown in Figure 1, phase-correcting circuit 200 includes two phase correction module 210 and 212, phase detecting module 220 and filtration module 230.
Phase-correcting circuit 200 of the present invention is used for proofreading and correct respectively the carrier phase of different sections in the demodulator circuit of receiving terminal in communication system; So that the handled signal of the signal processing module of each section all has correct carrier phase, the operation of the phase-correcting circuit 200 of present embodiment will be described below.
In the operation of phase-correcting circuit 200, at first, phase correction module 210 receiving inputted signal V
In, and according to phase correction signal V
Cal_1Proofread and correct input signal V
InPhase place produce to proofread and correct back signal V
In_calTo signal processing module 202, then, signal processing module 202 receives proofreaies and correct back signal V
In_calAnd back signal V is handled in generation
PlAfterwards, phase correction module 212 receives and handles back signal V
P1, and according to phase correction signal V
Cal_2Come signal V after the treatment for correcting
PlPhase place produce to proofread and correct back signal V
Pl_calTo signal processing module 204, and signal processing module 204 receives correction back signal V
Pl_calAnd generation feedback reference signal V
Fb_ref
Afterwards, phase detecting module 220 is according to feedback reference signal V
Fb_refTo produce phase error signal V
Phase_err, then, filtration module 230 is according to phase error signal V
Phase_errTo produce phase correction signal V respectively
Cal_1And V
Cal_2To phase correction module 210 and 212.
Must be noted that wherein signal processing module 204 is not an imperative, can be in phase detecting module 220 directly according to proofreading and correct back signal V
Pl_ca1Obtain phase error signal V
Phase_errApplication under, signal processing module 204 can omit.
Other is noted that in the present embodiment, the output signal of signal processing module 204 is as feedback reference signal V
Fb_ref, and phase detecting module 220 is again according to feedback reference signal V
Fb_refTo produce phase error signal V
Phase_errYet,, in other embodiments of the invention, signal V after the correction that phase correction module 212 is exported
Pl_calAlso can be used as feedback reference signal V
Fb_ref, that is phase detecting module 220 can be according to proofreading and correct back signal V
Pl_calTo produce phase error signal V
Phase_err
In addition, phase correction signal V
Cal_1And V
Cal_2Be to correspond to phase error signal V respectively
Phase_errThe different frequency section, in the present embodiment, phase correction signal V
Cal_1Be to correspond to phase error signal V
Phase_errMiddle lower frequency section, and phase correction signal V
Cal_2Be to correspond to phase error signal V
Pha se_errMiddle upper frequency section.Fig. 2 corresponds to the sketch map of phase error signal different frequency section for phase correction signal.
On real the work, the filtration module 230 in the phase-correcting circuit 200 comprises interlock circuits such as filter and phase accumulator, and Fig. 3 is an embodiment of filtration module 230 shown in Figure 1, and its implementation is a lot of, and wherein Fig. 3 is merely the sketch map of this embodiment.As shown in Figure 3, filtration module 230 comprises filter 410, adder 420 and 432, multiplier 424 and 430 and delay cell 422 and 434, and wherein multiplier 424 and 430 coefficient are respectively a
1And (1-a
1), and in the present embodiment, a
1Be the value that is set at much smaller than 1, in following narration, a
1Be to be set at 0.001.
In the operation of filtration module 230, suppose phase error signal V
Phase_errBe signal (that is the phase error signal V that slowly changes
Phase_errThe convergence certain value; Have very low frequency), can be 0.999 (1-0.001) then, and make signal after repeatedly passing through the circulation of multiplier 424, adder 420 and delay cell 422, understand convergence 0 gradually because of the coefficient of multiplier 424; That is after after a while, phase correction signal V
Cal_2Meeting convergence 0; Simultaneously, phase correction signal V
Cal_1Then can slowly increase to required corrected value because of the phase-accumulated function of multiplier 430, adder 432 and delay cell 434.
On the contrary, if phase error signal V
Phase_errBe fast-changing signal (that is phase error signal has high frequency), then phase correction signal V
Cal_1Meeting is convergence 0 gradually, and phase correction signal V
Cal_2Then can real time reaction go out required corrected value.
Be noted that in addition, in other embodiments of the invention, phase-correcting circuit even can comprise M phase correction module (M＞2), and filtration module according to phase error signal to produce M phase correction signal respectively to M phase correction module.
Please refer to Fig. 4, Fig. 4 is the sketch map according to the phase-correcting circuit 500 that is applied to 2 groups of signal processing modules 502 and 504 of second embodiment of the invention, and wherein each group signal processing module comprises at least one signal processing module.Phase-correcting circuit 500 includes two phase correction module 510 and 512, phase detecting module 520 and filtration module 530, and wherein filtration module 530 includes two filters.
In phase-correcting circuit 500, filter 532 and 534 is receiving phase error signal V respectively
Phase_err, and produce phase correction signal V respectively
Cal_2And V
Cal_1, the parameter in its median filter 532 and 534 is to make phase correction signal V through design
Cal_2And V
Cal_1Can correspond to phase error signal V respectively
Phase_errThe different frequency section.As for the operation of phase-correcting circuit 500 other elements be with the class of operation of phase-correcting circuit shown in Figure 1 200 seemingly; Those skilled in the art should realize the operation of phase-correcting circuit 500 each element according to the relevant narration of above-mentioned relevant phase-correcting circuit 200, therefore will repeat no more in this.
The above is merely preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (9)
1. phase-correcting circuit includes:
At least one group of signal processing module, each group signal processing module comprises a signal processing module;
At least 2 phase correction module; Wherein the output of the 1st phase correction module is coupled to the input of the 1st group of signal processing module; The input of the 2nd phase correction module is coupled to the output of the 1st group of signal processing module, signal the 1st group of signal processing module receives signal after the correction of the 1st phase correction module and produce the processing of the 1st group of signal processing module in output in input after;
Phase detecting module is used for producing phase error signal according to signal after the correction of M phase correction module, and wherein M is the positive integer more than or equal to 2; And
Filtration module is coupled to this phase detecting module, is used for according to this phase error signal to produce at least one the 1st phase correction signal and one the 2nd phase correction signal;
Wherein the 1st phase correction module according to the 1st phase correction signal with the correction that produces the 1st phase correction module after signal, and the 2nd phase correction module according to the 2nd phase correction signal with the correction that produces the 2nd phase correction module after signal.
2. phase-correcting circuit according to claim 1, wherein the 1st phase correction signal and the 2nd phase correction signal correspond to the different frequency section of this phase error signal respectively.
3. phase-correcting circuit according to claim 2, wherein the frequency zone of pairing this phase error signal of the 2nd phase correction signal is higher than the frequency zone of pairing this phase error signal of the 1st phase correction signal.
4. phase-correcting circuit according to claim 1; Wherein this filtration module comprises a plurality of filters that are respectively coupled to this phase detecting module, and those filters produce the 1st phase correction signal and the 2nd phase correction signal at least according to this phase error signal respectively.
5. phase-correcting circuit according to claim 1, it is the demodulator circuit that is arranged at receiving terminal in the communication system.
6. method for correcting phase includes:
At least one group of signal processing module is provided, and wherein each group signal processing module comprises a signal processing module;
At least 2 phase correction module are provided; Wherein the output of the 1st phase correction module is coupled to the input of the 1st group of signal processing module; The input of the 2nd phase correction module is coupled to the output of the 1st group of signal processing module, signal the 1st group of signal processing module receives signal after the correction of the 1st phase correction module and produce the processing of the 1st group of signal processing module in output in input after;
Produce phase error signal according to signal after the correction of M phase correction module, wherein M is the positive integer more than or equal to 2; And
According to this phase error signal to produce at least one the 1st phase correction signal and one the 2nd phase correction signal;
Wherein the 1st phase correction module according to the 1st phase correction signal with the correction that produces the 1st phase correction module after signal, and the 2nd phase correction module according to the 2nd phase correction signal with the correction that produces the 2nd phase correction module after signal.
7. method for correcting phase according to claim 6, wherein the 1st phase correction signal and the 2nd phase correction signal correspond to the different frequency section of this phase error signal respectively.
8. method for correcting phase according to claim 7, wherein the frequency zone of pairing this phase error signal of the 2nd phase correction signal is higher than the frequency zone of pairing this phase error signal of the 1st phase correction signal.
9. method for correcting phase according to claim 6, it is the demodulator circuit that is applied to receiving terminal in the communication system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810171065A CN101741789B (en) | 2008-11-06 | 2008-11-06 | Phase correction circuit and phase correction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810171065A CN101741789B (en) | 2008-11-06 | 2008-11-06 | Phase correction circuit and phase correction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101741789A CN101741789A (en) | 2010-06-16 |
| CN101741789B true CN101741789B (en) | 2012-08-29 |
Family
ID=42464688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810171065A Active CN101741789B (en) | 2008-11-06 | 2008-11-06 | Phase correction circuit and phase correction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101741789B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201215114D0 (en) * | 2012-08-24 | 2012-10-10 | Phasor Solutions Ltd | Improvements in or relating to the processing of noisy analogue signals |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199305A (en) * | 1997-05-12 | 1998-11-18 | 三星电子株式会社 | Phase correction circuit and method therefor |
| US5917352A (en) * | 1994-06-03 | 1999-06-29 | Sierra Semiconductor | Three-state phase-detector/charge pump with no dead-band offering tunable phase in phase-locked loop circuits |
| CN1797988A (en) * | 2004-12-28 | 2006-07-05 | 索尼株式会社 | Radio communication equipment and communication method |
-
2008
- 2008-11-06 CN CN200810171065A patent/CN101741789B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5917352A (en) * | 1994-06-03 | 1999-06-29 | Sierra Semiconductor | Three-state phase-detector/charge pump with no dead-band offering tunable phase in phase-locked loop circuits |
| CN1199305A (en) * | 1997-05-12 | 1998-11-18 | 三星电子株式会社 | Phase correction circuit and method therefor |
| CN1797988A (en) * | 2004-12-28 | 2006-07-05 | 索尼株式会社 | Radio communication equipment and communication method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101741789A (en) | 2010-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7061994B2 (en) | Methods and apparatus for I/Q imbalance compensation | |
| EP0239153B1 (en) | Adaptive blind equalization method and device | |
| CN101902235B (en) | Demodulator and communication apparatus | |
| WO2002099966A1 (en) | Switching amplifier having digital correction and method therefor | |
| EP2575310A1 (en) | Method and device for digital baseband predistortion | |
| CN1747460B (en) | Delay locked loop circuit, digital predistortion type transmitter using same, and wireless base station | |
| CN106936519B (en) | Signal calibration method and device and signal processing system | |
| JP2007221244A (en) | Distortion compensation device and method | |
| US20210297082A1 (en) | Correction Signaling Between Lanes in Multi-Chip-Modules | |
| JP2007221245A (en) | Distortion compensation device and method | |
| EP3540945A1 (en) | Quadrature clock generation circuit and method | |
| US8923462B2 (en) | Device and method for correcting duty cycle, and receiver including the same | |
| CN107231150A (en) | Clock correction device and clock correction method | |
| CN102123116A (en) | Direct-current offset calibration method and device | |
| CN104298287A (en) | Current correcting method and device and resistance correcting method and device | |
| US8427208B2 (en) | Phase interpolator and semiconductor circuit device | |
| CN102594262B (en) | Polar transmitter and signal transmitting method | |
| CN101741789B (en) | Phase correction circuit and phase correction method thereof | |
| EP2811703A1 (en) | Demodulation device, demodulation method, and program | |
| CN202374291U (en) | Direct current bias calibrating device | |
| CN106357323A (en) | Satellite channel group delay compensation method and device | |
| CN115834805B (en) | MIPI DPHY skew elimination circuit and method | |
| CN102025667B (en) | Circuit and method for eliminating direct current offset and radio frequency receiving chip | |
| CN1320774C (en) | Analog baseband signal processing system and method | |
| CN110351066B (en) | Clock phase recovery device, method and chip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |