CN108965194A - A kind of method and device that signal phase restores - Google Patents
A kind of method and device that signal phase restores Download PDFInfo
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- CN108965194A CN108965194A CN201810935249.XA CN201810935249A CN108965194A CN 108965194 A CN108965194 A CN 108965194A CN 201810935249 A CN201810935249 A CN 201810935249A CN 108965194 A CN108965194 A CN 108965194A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
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Abstract
The method and device that a kind of signal phase provided in an embodiment of the present invention restores, wherein method includes: by estimating postrotational signal to be restored error caused by adjudicating for postrotational each signal to be restored；It in the error caused by adjudicating, obtains from postrotational signal to be restored and rotates same phase, the estimation interval of the phase noise of signal to be restored；For the estimation interval of the phase noise of each signal to be restored, from the estimation interval of the phase noise, the error phase for compensating the signal to be restored is determined；Based on error phase, phase recovery is carried out to signal to be restored.The embodiment of the present invention determines each signal errors phase to be restored in the estimation interval of the phase noise of signal to be restored, reduces the seeking scope for determining each signal errors phase to be restored, can quickly determine each signal errors phase to be restored.Therefore the efficiency that phase recovery is carried out to signal to be restored can be improved in the embodiment of the present invention.
Description
Technical field
The present invention relates to field of communication technology, the method and device restored more particularly to a kind of signal phase.
Background technique
In signals transmission, the signal of transmission is known as signal to be restored, signal to be restored after modulation by loading
It onto light carrier, is transmitted by optical fiber link, signal is amplified, amplified signal is then converted into digital signal.
Digital signal needs to first pass through dispersion non-linearity compensation and offset estimation, and signal to be restored is then carried out phase recovery.
The prior art is restored using blind phase estimation method to by the phase of signal to be restored, and process is as follows:
Same group of signal to be restored is divided into 32 phases from -45 degree to 45 degree, and degree differs between each phase
2.8 degree；It phase rotation 32 times after every group of signal to be restored is divided equally according to inequality equal difference, obtains postrotational each to be restored
Signal.Using 16QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation) planisphere of standard to rotation
Signal to be restored makes decisions each of after turning, coordinate of the signal to be restored in 16QAM planisphere each of after determining judgement,
Euclidean distance each of after calculating judgement between signal to be restored and postrotational signal to be restored；Same phase will be rotated
Euclidean distance between the signal to be restored of same phase after signal to be restored and judgement is cumulative, determines the mistake of signal to be restored
Poor phase carries out phase recovery to signal to be restored using error phase.
Blind phase estimation method restores signal phase precision to be restored to improve, due to by every group of signal to be restored according to
Equal difference divide equally after phase rotation 32 times, each of need repeatedly to calculate after judgement signal to be restored and 32 times it is postrotational to
The Euclidean distance restored between signal determines signal to be restored based on the Euclidean distance of multiple postrotational signals to be restored
The time of error phase, cost is longer.Therefore the prior art is extensive to signal to be restored progress phase using blind phase estimation method
Multiple efficiency is too low.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of method and device that signal phase restores, and is waited for by reducing every group
Restore the number of revolutions of signal, to realize the complexity for reducing signal phase to be restored and restoring.Specific technical solution is as follows:
In a first aspect, the embodiment of the invention provides a kind of methods that signal phase restores, comprising:
To postrotational each signal to be restored, postrotational signal to be restored error caused by adjudicating is estimated；Institute
State postrotational signal to be restored error caused by adjudicating and be using in 16 quadrature amplitude modulation QAM constellations with rotation
The nearest constellation point of signal to be restored determines each of afterwards；
It in the error caused by adjudicating, obtains from postrotational signal to be restored and rotates same phase, letter to be restored
Number phase noise estimation interval；
For the estimation interval of the phase noise of each signal to be restored, from the estimation interval of the phase noise, determine
For compensating the error phase of the signal to be restored；
Based on error phase, phase recovery is carried out to signal to be restored.
Optionally, for postrotational each signal to be restored, postrotational signal to be restored is estimated produced by adjudicating
Error, comprising:
In 16QAM planisphere, the determining and nearest constellation point of postrotational each signal to be restored；
For postrotational each signal to be restored, calculate and the nearest constellation point of the postrotational signal to be restored and this
Euclidean distance is determined as postrotational signal to be restored caused by judgement by the Euclidean distance of postrotational signal to be restored
Error.
Optionally, it in the error caused by adjudicating, obtains from postrotational signal to be restored and rotates same phase, to
Restore the estimation interval of the phase noise of signal, comprising:
The signal to be restored for rotating same phase error caused by adjudicating is added up, is obtained postrotational to extensive
Complex signal error caused by adjudicating it is cumulative and；
From postrotational signal to be restored error caused by adjudicating it is cumulative and in, determine when error is cumulative and minimum and
Error cumulative and secondary hour, the first phase and second phase which rotates respectively；
First phase and second phase are formed into section, are determined as rotating same phase, the phase of signal to be restored is made an uproar
The estimation interval of sound.
Optionally, for the estimation interval of the phase noise of each signal to be restored, from the estimation interval of the phase noise
In, determine the error phase for compensating the signal to be restored, comprising:
The estimation interval equal difference of phase noise is divided equally P parts, obtains noise phase；
By each signal to be restored, rotated according to noise phase, it will be according to the postrotational letter to be restored of noise phase
Number be used as rotation compensation signal；
The error of rotation compensation signal is calculated, and the error for rotating the rotation compensation signal of same noise phase is carried out tired
Add, when determining that error is cumulative and minimum, the noise phase of rotation compensation signal rotation, and error is cumulative and minimum when, rotation
The noise phase of thermal compensation signal rotation, is determined as the error phase for compensating signal to be restored.
Optionally, for the estimation interval of the phase noise of each signal to be restored, from the estimation interval of the phase noise
In, determine the error phase for compensating the signal to be restored, comprising:
The estimation interval equal difference of phase noise is divided equally P parts, obtains noise phase；
By each signal to be restored, rotated according to noise phase, it will be according to the postrotational letter to be restored of noise phase
Number be used as rotation compensation signal；
Calculate rotation compensation signal first moment, and will rotate same noise phase rotation compensation signal first moment into
Row is cumulative, and when determining that first moment is cumulative and minimum, which is determined as using by the noise phase of rotation compensation signal rotation
In the error phase for compensating signal to be restored.
Optionally, using following steps, postrotational each signal to be restored is determined:
To each signal to be restored, signal to be restored is rotated, determines rotation by N number of phase after dividing equally according to equal difference
Signal to be restored each of after turning；Wherein, N is the positive integer less than 32.
Second aspect, the embodiment of the invention provides the devices that a kind of signal phase restores, comprising:
Module is estimated, for estimating postrotational signal to be restored by judgement institute to postrotational each signal to be restored
The error of generation；It is to utilize 16 quadrature amplitude modulation qam constellations that postrotational signal to be restored, which is adjudicated generated error to be,
It is determined in figure with the nearest constellation point of postrotational each signal to be restored；
Section determining module, in the error caused by adjudicating, it is same to obtain rotation from postrotational signal to be restored
One phase, the estimation interval of the phase noise of signal to be restored；
Phase determination module, for the estimation interval of the phase noise for each signal to be restored, from the phase noise
Estimation interval in, determine the error phase for compensating the signal to be restored；
Phase restoring module carries out phase recovery to signal to be restored for being based on error phase.
Optionally, module is estimated to be specifically used for:
In 16QAM planisphere, the determining and nearest constellation point of postrotational each signal to be restored；
For postrotational each signal to be restored, calculate and the nearest constellation point of the postrotational signal to be restored and this
Euclidean distance is determined as postrotational signal to be restored caused by judgement by the Euclidean distance of postrotational signal to be restored
Error.
Optionally, section determining module is specifically used for:
The signal to be restored for rotating same phase error caused by adjudicating is added up, is obtained postrotational to extensive
Complex signal error caused by adjudicating it is cumulative and；
From postrotational signal to be restored error caused by adjudicating it is cumulative and in, determine when error is cumulative and minimum and
Error cumulative and secondary hour, the first phase and second phase which rotates respectively；
First phase and second phase are formed into section, are determined as rotating same phase, the phase of signal to be restored is made an uproar
The estimation interval of sound.
Optionally, phase determination module is specifically used for:
The estimation interval equal difference of phase noise is divided equally P parts, obtains noise phase；
By each signal to be restored, rotated according to noise phase, it will be according to the postrotational letter to be restored of noise phase
Number be used as rotation compensation signal；
The error of rotation compensation signal is calculated, and the error for rotating the rotation compensation signal of same noise phase is carried out tired
Add, when determining that error is cumulative and minimum, the noise phase of rotation compensation signal rotation, and error is cumulative and minimum when, rotation
The noise phase of thermal compensation signal rotation, is determined as the error phase for compensating signal to be restored.
Optionally, phase determination module is specifically used for:
The estimation interval equal difference of phase noise is divided equally P parts, obtains noise phase；
By each signal to be restored, rotated according to noise phase, it will be according to the postrotational letter to be restored of noise phase
Number be used as rotation compensation signal；
Calculate rotation compensation signal first moment, and will rotate same noise phase rotation compensation signal first moment into
Row is cumulative, and when determining that first moment is cumulative and minimum, which is determined as using by the noise phase of rotation compensation signal rotation
In the error phase for compensating signal to be restored.
The device that a kind of signal phase provided in an embodiment of the present invention restores further include: signal determining module is specifically used for:
To each signal to be restored, signal to be restored is rotated, determines rotation by N number of phase after dividing equally according to equal difference
Signal to be restored each of after turning；Wherein, N is the positive integer less than 32.
At the another aspect that the present invention is implemented, a kind of computer readable storage medium is additionally provided, it is described computer-readable
Instruction is stored in storage medium, when run on a computer, so that computer executes a kind of any of the above-described letter
The method of number phase recovery.
At the another aspect that the present invention is implemented, the embodiment of the invention also provides a kind of, and the computer program comprising instruction is produced
Product, when run on a computer, so that computer executes the method that a kind of any of the above-described signal phase restores.
The method and device that a kind of signal phase provided in an embodiment of the present invention restores, by for it is postrotational each to
Restore signal, estimates postrotational signal to be restored error caused by adjudicating；It is adjudicated from postrotational signal to be restored
In generated error, obtains and rotate same phase, the estimation interval of the phase noise of signal to be restored；For each to extensive
The estimation interval of the phase noise of complex signal is determined from the estimation interval of the phase noise for compensating the signal to be restored
Error phase；Based on error phase, phase recovery is carried out to signal to be restored.The embodiment of the present invention exists compared with the prior art
The estimation interval of the phase noise of signal to be restored determines each signal errors phase to be restored, reduces and determines each to extensive
The seeking scope of complex signal error phase can quickly determine each signal errors phase to be restored.Therefore the embodiment of the present invention
The efficiency that phase recovery is carried out to signal to be restored can be improved.Certainly, it implements any of the products of the present invention or method and different
It is fixed to need while reaching all the above advantage.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.
Fig. 1 is the method flow diagram that a kind of signal phase provided in an embodiment of the present invention restores；
Fig. 2 is the schematic diagram of the planisphere of prior art Plays 16QAM；
Fig. 3 is the effect picture of the estimation interval of phase noise provided in an embodiment of the present invention；
When Fig. 4 is rotation compensation signal rotation difference noise phase provided in an embodiment of the present invention, rotation compensation signal
The effect picture of first moment；
Fig. 5 is the structure chart for the device that a kind of signal phase provided in an embodiment of the present invention restores；
Fig. 6 is the structure chart of a kind of electronic equipment provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is described.
The method and device that a kind of signal phase provided in an embodiment of the present invention restores, by for it is postrotational each to
Restore signal, estimates postrotational signal to be restored error caused by adjudicating；It is adjudicated from postrotational signal to be restored
In generated error, obtains and rotate same phase, the estimation interval of the phase noise of signal to be restored；For each to extensive
The estimation interval of the phase noise of complex signal is determined from the estimation interval of the phase noise for compensating the signal to be restored
Error phase；Based on the error phase, phase recovery is carried out to the signal to be restored.The embodiment of the present invention is compared to existing
There is technology, the efficiency that phase recovery is carried out to signal to be restored can be improved in the embodiment of the present invention.
The method for restoring a kind of signal phase provided in an embodiment of the present invention is continued with to be briefly described.
The method that a kind of signal phase provided in an embodiment of the present invention restores, is applied to electronic equipment, and further electronics is set
Standby can be mobile phone, computer, server, intelligent mobile terminal equipment, wearable intelligent mobile terminal equipment etc.；It can also answer
For providing the company of telematics service.It is not limited here, any that electronic equipment of the invention may be implemented, belong to this
The protection scope of invention.
As shown in Figure 1, the method that a kind of signal phase provided in an embodiment of the present invention restores, comprising:
S101 estimates postrotational signal to be restored and misses caused by judgement to postrotational each signal to be restored
Difference；Postrotational signal to be restored error caused by adjudicating be using in 16 quadrature amplitude modulation QAM constellations with rotation
The nearest constellation point of signal to be restored determines each of after turning；
For the determination process of above-mentioned postrotational each signal to be restored, following possible embodiment can be used,
, can be to each signal to be restored in a kind of possible embodiment, N number of phase after dividing equally according to equal difference, will it is described to
Restore signal to be rotated, determines postrotational each signal to be restored.
Wherein, N is the positive integer less than 32, and the phase that equal difference is divided equally is from -45 degree to 45 degree.
Assuming that N is 16；Y represents signal to be restored； It is equal to represent equal difference
N-th of phase after point.Signal to be restored after rotation are as follows:K indicates the serial number of signal to be restored；N representative etc.
Difference divide equally after phase serial number.
Present embodiment by by each signal to be restored according to equal difference divide equally after be less than 32 phase rotatioies, compared to
The prior art reduces the number of revolutions to each signal to be restored, can be improved and determines postrotational each signal to be restored
Efficiency.
After determining postrotational each signal to be restored, in order to improve the effect for carrying out phase recovery to signal to be restored
Rate, above-mentioned S101 can estimate postrotational signal to be restored by judgement institute using following at least one possible implementation
The error of generation:
In a kind of possible embodiment, using following steps, estimates postrotational signal to be restored and produced by judgement
Raw error:
Step 1: in 16QAM planisphere, the determining and nearest constellation point of postrotational each signal to be restored；
Step 2: using the signal of the constellation point nearest with postrotational signal to be restored as the letter to be restored after being adjudicated
Number；
Step 3: calculating the Euclidean distance with signal to be restored and postrotational signal to be restored after judgement, will be European
Distance is determined as postrotational signal to be restored error caused by adjudicating.
It is the planisphere of standard 16QAM with reference to Fig. 2, Fig. 2.The abscissa of planisphere has value (- 3, -1,1,3)；Ordinate has
It is worth (- 3, -1,1,3).Hollow dots are signal to be restored in figure, are (1,1) apart from the nearest coordinate points of signal to be restored, then in star
In seat figure, formula d is utilizedk,n=| yn-[yn]D|2Coordinates computed point (1,1) and the postrotational signal to be restored it is European away from
From.dk,nRepresent the Euclidean distance of postrotational signal to be restored nearest constellation point and the postrotational signal to be restored；[yn]D
Represent the signal to be restored after being adjudicated；K indicates the serial number of signal to be restored；N represents the serial number of the phase after equal difference is divided equally；
[yn]DThe representative of middle D is to ynIt makes decisions；ynRepresent the signal to be restored after dividing equally according to equal difference after n-th of phase rotation.
Present embodiment utilizes 16QAM planisphere, by calculating and the nearest constellation point of the postrotational signal to be restored
With the Euclidean distance of the postrotational signal to be restored, the effect for determining signal to be restored error caused by adjudicating can be improved
Rate.
S102 in the error caused by adjudicating, is obtained from postrotational signal to be restored and is rotated same phase, to extensive
The estimation interval of the phase noise of complex signal；
It, can be using following possible embodiment, in one kind for the estimation interval process of above-mentioned determining phase noise
In possible embodiment, using following steps, obtains and rotate same phase, the zone of estimate of the phase noise of signal to be restored
Between:
Step 1: the signal to be restored for rotating same phase error caused by adjudicating is added up, is rotated
The error caused by adjudicating of signal to be restored afterwards it is cumulative and；
Step 2: from postrotational signal to be restored error caused by adjudicating it is cumulative and in, determine error it is cumulative and
When minimum and error is cumulative with time hour, the first phase and second phase which rotates respectively；
Wherein, when first phase is that postrotational signal to be restored error caused by adjudicating is cumulative and minimum, rotation
The phase of signal rotation to be restored afterwards；Second phase are as follows: postrotational signal to be restored error caused by adjudicating adds up
With secondary hour, the phase of postrotational signal rotation to be restored.
Step 3: forming section for first phase and second phase, be determined as rotating same phase, signal to be restored
The estimation interval of phase noise.
With reference to Fig. 3, having 4 signals to be restored in Fig. 3 is A, B, C, D respectively；Signal A, B to be restored are one group, rotate phase
Signal A, B to be restored that position is 15 degree by the generated error of judgement and are 20；Rotatable phase be 30 degree signal A to be restored,
B by the generated error of judgement and is 25；Signal A, B to be restored of remaining rotatable phase are by the generated error of judgement and
Greater than 25.Therefore, the estimation interval of 15 degree and 30 degree of the rotatable phase phase noises as signal A, B to be restored is selected.
Present embodiment, which passes through, adds up the signal to be restored error caused by adjudicating for rotating same phase, really
When determining cumulative error and minimum and error adds up and time hour, the estimation interval of the phase noise of signal to be restored, it is possible to reduce
It determines the range of the error phase of signal to be restored, improves the efficiency for carrying out phase recovery to signal to be restored.
S103, for the estimation interval of the phase noise of each signal to be restored, from the estimation interval of the phase noise,
Determine the error phase for compensating signal to be restored；
In order to improve the efficiency for carrying out phase recovery to signal to be restored, above-mentioned S103 can use following at least one can
The implementation of energy, determines the error phase for compensating signal to be restored:
In a kind of possible embodiment, using following steps, the error phase for compensating the signal to be restored is determined
Position:
Step 1: the estimation interval equal difference of the phase noise is divided equally P parts, obtains noise phase；
Step 2: each signal to be restored is rotated according to the noise phase, will be revolved according to the noise phase
Signal to be restored after turning is as rotation compensation signal；
Step 3: the error of rotation compensation signal is calculated, and the mistake of the rotation compensation signal of same noise phase will be rotated
Difference adds up, when determining that error is cumulative and minimum, the noise phase of rotation compensation signal rotation, and error is cumulative and minimum
When, the noise phase of rotation compensation signal rotation is determined as the error phase for compensating signal to be restored.
Present embodiment is believed the rotation compensation for rotating same noise phase by calculating the error of rotation compensation signal
Number error add up, when determining that error is cumulative and minimum, determination is can be improved in the noise phase of rotation compensation signal rotation
For compensating the efficiency of the error phase of signal to be restored.
In alternatively possible embodiment, using following steps, the error phase for compensating signal to be restored is determined
Position:
Step 1: the estimation interval equal difference of phase noise is divided equally P parts, obtains noise phase；
Step 2: each signal to be restored is rotated according to the noise phase, will be revolved according to the noise phase
Signal to be restored after turning is as rotation compensation signal；
Wherein, P is the positive integer less than or equal to 32.
Assuming that P is 5；Y represents signal to be restored；For first phase；For second phase；θ is estimating for phase noise
Count section.θPRepresent p-th of noise phase.Rotation compensation letter
Number are as follows:K indicates the serial number of signal to be restored；P represents the serial number of noise phase；
Step 3: calculating the first moment of rotation compensation signal, and the rotation compensation signal of same noise phase will be rotated
First moment adds up, when determining that first moment is cumulative and minimum, the noise phase of rotation compensation signal rotation, by the noise phase
It is determined as the error phase for compensating signal to be restored.
With reference to Fig. 4, the calculation formula for calculating the first moment of rotation compensation signal is dk,p=min (| t- [yk]h|)；T is represented
Abscissa in 16QAM planisphere；[yk]hFor k rotation compensation signal abscissa value；[yk]hIn h representative take ykHorizontal seat
Mark；dk,pRotate the first moment of k-th of rotation compensation signal of p-th of noise phase；K represents the serial number of rotation compensation signal, together
When also illustrate that the serial number of signal to be restored；P represents the serial number of noise phase；D represents the first moment of rotation compensation signal.
The rotation compensation signal single order of same noise phase is away from cumulative sum formula are as follows:E represents rotation and mends
Repay the single order of signal away from；When choosing minimum e, the noise phase θ of rotation compensation signal rotationendAs error phase；θendIt represents
The error phase θ of signal to be restoredendIn end represent phase subscript corresponding to minimum e value；dm,pRotation P are represented to make an uproar
In the rotation compensation signal of sound phase, the single order of m-th of rotation compensation signal away from；M represents the rotation for rotating same noise phase
The serial number of thermal compensation signal；M represents the number for rotating the rotation compensation signal of same noise phase.
Horizontal axis is the noise phase of rotation compensation signal rotation in Fig. 4, and the longitudinal axis is the first moment of rotation compensation signal rotation.
As can be seen that the first moment of rotation compensation signal is minimum when the noise phase of rotation compensation signal rotation is 0 degree.
Present embodiment passes through the first moment for calculating rotation compensation signal, and the rotation compensation that will rotate same noise phase
The first moment of signal adds up, when determining that first moment is cumulative and minimum, the noise phase of rotation compensation signal rotation, and Ke Yiti
Height determines the error phase accuracy rate for compensating signal to be restored.
In another possible embodiment, for the estimation interval of the phase noise of each signal to be restored, at this
In the estimation interval of phase noise, the variance of signal to be restored is calculated；The variance for rotating the signal to be restored of same phase is asked
With；When determining the variance for rotating the signal to be restored of same phase and minimum, the phase of signal rotation to be restored；Determine the phase
For the error phase for compensating signal to be restored.Compared to the first moment by calculating signal to be restored, determine compensation to extensive
The effect determined for compensating the error phase of signal to be restored can be improved in the mode of the error phase of complex signal, present embodiment
Rate.
S104 is based on error phase, carries out phase recovery to signal to be restored.
Such as: it usesPhase recovery is carried out to signal to be restored.Wherein, y represents signal to be restored；y'
Signal after representing phase recovery；θendRepresent the error phase of signal to be restored.
The embodiment of the present invention compared with the prior art in the estimation interval of the phase noise of signal to be restored, determine each to
Restore signal errors phase, reduce the seeking scope for determining each signal errors phase to be restored, can quickly determine each
Signal errors phase to be restored.Therefore the efficiency that phase recovery is carried out to signal to be restored can be improved in the embodiment of the present invention.
The device for restoring a kind of signal phase provided in an embodiment of the present invention is continued with to be briefly described.
As shown in figure 5, the embodiment of the invention provides the devices that a kind of signal phase restores, comprising:
Module 501 is estimated, for postrotational signal to be restored being estimated and being adjudicated to postrotational each signal to be restored
Generated error；It is to utilize 16 quadrature amplitude modulation QAM stars that postrotational signal to be restored, which is adjudicated generated error to be,
It is determined in seat figure with the nearest constellation point of postrotational each signal to be restored；
Section determining module 502, in the error caused by adjudicating, being rotated from postrotational signal to be restored
Same phase, the estimation interval of the phase noise of signal to be restored；
Phase determination module 503 is made an uproar for the estimation interval of the phase noise for each signal to be restored from the phase
In the estimation interval of sound, the error phase for compensating the signal to be restored is determined；
Phase restoring module 504 carries out phase recovery to signal to be restored for being based on error phase.
Optionally, module is estimated to be specifically used for:
In 16QAM planisphere, the determining and nearest constellation point of postrotational each signal to be restored；
For postrotational each signal to be restored, calculate and the nearest constellation point of the postrotational signal to be restored and this
Euclidean distance is determined as postrotational signal to be restored caused by judgement by the Euclidean distance of postrotational signal to be restored
Error.
Optionally, section determining module is specifically used for:
The signal to be restored for rotating same phase error caused by adjudicating is added up, is obtained postrotational to extensive
Complex signal error caused by adjudicating it is cumulative and；
From postrotational signal to be restored error caused by adjudicating it is cumulative and in, determine when error is cumulative and minimum and
Error cumulative and secondary hour, the first phase and second phase which rotates respectively；
First phase and second phase are formed into section, are determined as rotating same phase, the phase of signal to be restored is made an uproar
The estimation interval of sound.
Optionally, phase determination module is specifically used for:
The estimation interval equal difference of the phase noise is divided equally P parts, obtains noise phase；
By each signal to be restored, rotated according to the noise phase, it will be postrotational according to the noise phase
Signal to be restored is as rotation compensation signal；
The error of rotation compensation signal is calculated, and the error for rotating the rotation compensation signal of same noise phase is carried out tired
Add, when determining that error is cumulative and minimum, the noise phase of rotation compensation signal rotation, and error is cumulative and minimum when, rotation
The noise phase of thermal compensation signal rotation, is determined as the error phase for compensating signal to be restored.
Optionally, phase determination module is specifically used for:
The estimation interval equal difference of phase noise is divided equally P parts, obtains noise phase；
By each signal to be restored, rotated according to the noise phase, it will be postrotational according to the noise phase
Signal to be restored is as rotation compensation signal；
Calculate rotation compensation signal first moment, and will rotate same noise phase rotation compensation signal first moment into
Row is cumulative, and when determining that first moment is cumulative and minimum, which is determined as using by the noise phase of rotation compensation signal rotation
In the error phase for compensating signal to be restored.
The device that a kind of signal phase provided in an embodiment of the present invention restores further include: signal determining module is specifically used for:
To each signal to be restored, N number of phase after dividing equally according to equal difference rotates the signal to be restored, really
Fixed postrotational each signal to be restored；Wherein, N is the positive integer less than 32.
The embodiment of the invention also provides a kind of electronic equipment, as shown in fig. 6, include processor 601, communication interface 602,
Memory 603 and communication bus 604, wherein processor 601, communication interface 602, memory 603 are complete by communication bus 604
At mutual communication,
Memory 603, for storing computer program；
Processor 601 when for executing the program stored on memory 603, realizes following steps:
To postrotational each signal to be restored, postrotational signal to be restored error caused by adjudicating is estimated；Institute
State postrotational signal to be restored error caused by adjudicating and be using in 16 quadrature amplitude modulation QAM constellations with it is described
The nearest constellation point of postrotational each signal to be restored determines；
It in the error caused by adjudicating, obtains from postrotational signal to be restored and rotates same phase, letter to be restored
Number phase noise estimation interval；
For the estimation interval of the phase noise of each signal to be restored, from the estimation interval of the phase noise, determine
For compensating the error phase of the signal to be restored；
Based on the error phase, phase recovery is carried out to the signal to be restored.
The communication bus that above-mentioned electronic equipment is mentioned can be Peripheral Component Interconnect standard (Peripheral Component
Interconnect, abbreviation PCI) bus or expanding the industrial standard structure (Extended Industry Standard
Architecture, abbreviation EISA) bus etc..The communication bus can be divided into address bus, data/address bus, control bus etc..
Only to be indicated with a thick line in figure, it is not intended that an only bus or a type of bus convenient for indicating.
Communication interface is for the communication between above-mentioned electronic equipment and other equipment.
Memory may include random access memory (Random Access Memory, abbreviation RAM), also may include
Nonvolatile memory (non-volatile memory), for example, at least a magnetic disk storage.Optionally, memory may be used also
To be storage device that at least one is located remotely from aforementioned processor.
Above-mentioned processor can be general processor, including central processing unit (Central Processing Unit,
Abbreviation CPU), network processing unit (Network Processor, abbreviation NP) etc.；It can also be digital signal processor
(Digital Signal Processing, abbreviation DSP), specific integrated circuit (Application Specific
Integrated Circuit, abbreviation ASIC), field programmable gate array (Field-Programmable Gate Array,
Abbreviation FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware components.
In another embodiment provided by the invention, a kind of computer readable storage medium is additionally provided, which can
It reads to be stored with instruction in storage medium, when run on a computer, so that computer executes any institute in above-described embodiment
The method that a kind of signal phase stated restores.
In another embodiment provided by the invention, a kind of computer program product comprising instruction is additionally provided, when it
When running on computers, so that computer executes the method that a kind of any signal phase restores in above-described embodiment.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real
It is existing.When implemented in software, it can entirely or partly realize in the form of a computer program product.The computer program
Product includes one or more computer instructions.When loading on computers and executing the computer program instructions, all or
It partly generates according to process or function described in the embodiment of the present invention.The computer can be general purpose computer, dedicated meter
Calculation machine, computer network or other programmable devices.The computer instruction can store in computer readable storage medium
In, or from a computer readable storage medium to the transmission of another computer readable storage medium, for example, the computer
Instruction can pass through wired (such as coaxial cable, optical fiber, number from a web-site, computer, server or data center
User's line (DSL)) or wireless (such as infrared, wireless, microwave etc.) mode to another web-site, computer, server or
Data center is transmitted.The computer readable storage medium can be any usable medium that computer can access or
It is comprising data storage devices such as one or more usable mediums integrated server, data centers.The usable medium can be with
It is magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk
Solid State Disk (SSD)) etc..
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Each embodiment in this specification is all made of relevant mode and describes, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device reality
For applying example, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to embodiment of the method
Part explanation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of method that signal phase restores, which is characterized in that the described method includes:
To postrotational each signal to be restored, postrotational signal to be restored error caused by adjudicating is estimated；The rotation
Signal to be restored error caused by adjudicating after turning be using in 16 quadrature amplitude modulation QAM constellations with the rotation
The nearest constellation point of signal to be restored determines each of afterwards；
It in the error caused by adjudicating, obtains from postrotational signal to be restored and rotates same phase, signal to be restored
The estimation interval of phase noise；
For the estimation interval of the phase noise of each signal to be restored, from the estimation interval of the phase noise, determination is used for
Compensate the error phase of the signal to be restored；
Based on the error phase, phase recovery is carried out to the signal to be restored.
2. being estimated the method according to claim 1, wherein described be directed to postrotational each signal to be restored
Postrotational signal to be restored error caused by adjudicating, comprising:
In 16QAM planisphere, the determining and nearest constellation point of postrotational each signal to be restored；
For postrotational each signal to be restored, calculate and the nearest constellation point of the postrotational signal to be restored and the rotation
The Euclidean distance is determined as the postrotational signal to be restored and produced by judgement by the Euclidean distance of signal to be restored afterwards
Raw error.
3. the method according to claim 1, wherein it is described from postrotational signal to be restored produced by adjudicating
Error in, obtain and rotate same phase, the estimation interval of the phase noise of signal to be restored, comprising:
The signal to be restored for rotating same phase error caused by adjudicating is added up, postrotational letter to be restored is obtained
Number error caused by adjudicating it is cumulative and；
From postrotational signal to be restored error caused by adjudicating it is cumulative and in, determine when error is cumulative and minimum and error
Cumulative and time hour, the first phase and second phase which rotates respectively；
The first phase and second phase are formed into section, are determined as the same phase of rotation, the signal to be restored
Phase noise estimation interval.
4. the method according to claim 1, wherein the phase noise for each signal to be restored is estimated
Meter section determines the error phase for compensating the signal to be restored from the estimation interval of the phase noise, comprising:
The estimation interval equal difference of the phase noise is divided equally P parts, obtains noise phase；
By each signal to be restored, rotated according to the noise phase, it will be postrotational to extensive according to the noise phase
Complex signal is as rotation compensation signal；
Calculate the error of the rotation compensation signal, and will rotate same noise phase the rotation compensation signal error into
Row is cumulative, when determining that the error is cumulative and minimum, the noise phase of the rotation compensation signal rotation, and the error is tired out
When adduction is minimum, the noise phase of the rotation compensation signal rotation is determined as the error for compensating the signal to be restored
Phase.
5. the method according to claim 1, wherein the phase noise for each signal to be restored is estimated
Meter section determines the error phase for compensating the signal to be restored from the estimation interval of the phase noise, comprising:
The estimation interval equal difference of the phase noise is divided equally P parts, obtains noise phase；
By each signal to be restored, rotated according to the noise phase, it will be postrotational to extensive according to the noise phase
Complex signal is as rotation compensation signal；
The first moment of the rotation compensation signal is calculated, and the single order of the rotation compensation signal of same noise phase will be rotated
Square adds up, when determining that the first moment is cumulative and minimum, the noise phase of the rotation compensation signal rotation, by the noise
Phase is determined as the error phase for compensating the signal to be restored.
6. the method according to claim 1, wherein being determined postrotational each to be restored using following steps
Signal:
To each signal to be restored, the signal to be restored is rotated, determines rotation by N number of phase after dividing equally according to equal difference
Signal to be restored each of after turning；Wherein, N is the positive integer less than 32.
7. the device that a kind of signal phase restores, which is characterized in that described device includes:
Module is estimated, for estimating postrotational signal to be restored produced by adjudicating to postrotational each signal to be restored
Error；It is to utilize 16 quadrature amplitude modulation qam constellations that the postrotational signal to be restored, which is adjudicated generated error to be,
It is determined in figure with the nearest constellation point of postrotational each signal to be restored；
Section determining module, in the error caused by adjudicating, obtaining from postrotational signal to be restored and rotating same phase
Position, the estimation interval of the phase noise of signal to be restored；
Phase determination module, for the estimation interval of the phase noise for each signal to be restored, from estimating for the phase noise
It counts in section, determines the error phase for compensating the signal to be restored；
Phase restoring module carries out phase recovery to the signal to be restored for being based on the error phase.
8. device according to claim 7, which is characterized in that the module of estimating is specifically used for:
In 16QAM planisphere, the determining and nearest constellation point of postrotational each signal to be restored；
For postrotational each signal to be restored, calculate and the nearest constellation point of the postrotational signal to be restored and the rotation
The Euclidean distance is determined as the postrotational signal to be restored and produced by judgement by the Euclidean distance of signal to be restored afterwards
Raw error.
9. device according to claim 7, which is characterized in that the section determining module is specifically used for:
The signal to be restored for rotating same phase error caused by adjudicating is added up, postrotational letter to be restored is obtained
Number error caused by adjudicating it is cumulative and；
From postrotational signal to be restored error caused by adjudicating it is cumulative and in, determine when error is cumulative and minimum and error
Cumulative and time hour, the first phase and second phase which rotates respectively；
The first phase and second phase are formed into section, are determined as the same phase of rotation, the signal to be restored
Phase noise estimation interval.
10. device according to claim 7, which is characterized in that the phase determination module is specifically used for:
The estimation interval equal difference of phase noise is divided equally P parts, obtains noise phase；
By each signal to be restored, rotated according to the noise phase, it will be postrotational to extensive according to the noise phase
Complex signal is as rotation compensation signal；
Calculate the error of the rotation compensation signal, and will rotate same noise phase the rotation compensation signal error into
Row is cumulative, when determining that the error is cumulative and minimum, the noise phase of the rotation compensation signal rotation, and the error is tired out
When adduction is minimum, the noise phase of the rotation compensation signal rotation is determined as the error for compensating the signal to be restored
Phase.
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