CN111585739A - Phase adjustment method and device - Google Patents

Phase adjustment method and device Download PDF

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CN111585739A
CN111585739A CN202010364311.1A CN202010364311A CN111585739A CN 111585739 A CN111585739 A CN 111585739A CN 202010364311 A CN202010364311 A CN 202010364311A CN 111585739 A CN111585739 A CN 111585739A
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signal
value
point
signal point
adjusted
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CN111585739B (en
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忻向军
刘博�
张琦
王曦朔
高然
田凤
田清华
李良川
王光全
王拥军
杨雷静
盛夏
常欢
郭栋
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Network Technology Research Institute Of China Union Network Communication Co ltd
Beijing Institute of Technology BIT
Beijing University of Posts and Telecommunications
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Network Technology Research Institute Of China Union Network Communication Co ltd
Beijing Institute of Technology BIT
Beijing University of Posts and Telecommunications
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information

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Abstract

The embodiment of the invention provides a phase adjustment method and a phase adjustment device, which relate to the technical field of communication, wherein the method comprises the following steps: determining a signal point with an amplitude value lower than a preset amplitude value according to a signal value of a signal point corresponding to each sampling time point in a signal to be adjusted, wherein the signal value represents the amplitude value and the phase value of the signal point, the amplitude value of the determined signal point is improved, and a reference phase difference is predicted according to the signal value of each signal point in the signal to be adjusted, wherein the reference phase difference represents: and the signal sending end sends the original signal to the signal receiving end, and the phase difference between the original signal and the signal to be adjusted is obtained. And adjusting the phase of each signal point in the signal to be adjusted before the amplitude is adjusted according to the predicted reference phase difference. The scheme provided by the embodiment of the invention is applied to phase adjustment, so that the accuracy of the phase adjustment result can be improved.

Description

Phase adjustment method and device
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a phase adjustment method and apparatus.
Background
When a signal sending end sends a signal to a signal receiving end, a phase difference may exist between the signal sent by the signal sending end and the signal received by the signal receiving end, and the signal receiving end needs to determine the phase difference and perform phase adjustment on the received signal according to the phase difference to accurately obtain an original signal sent by the signal sending end.
In the prior art, the phase difference is generally calculated according to the signal points with higher amplitudes, so the accuracy of the calculated phase difference is closely related to the number of the signal points with higher amplitudes in the signal. If the number of signal points with higher amplitude in the signal is small, the accuracy of the calculated phase difference is also low, so that the accuracy of the signal obtained by adjusting the received signal according to the phase difference is low relative to the original signal. Wherein the signal points correspond to sampling time points.
For example, in order to increase the transmission speed of a signal, a signal transmitting end often converts a part of signal values in a binary signal from 1 to 0 by using a probability shaping method, and then obtains a signal to be transmitted to a signal receiving end according to the signal after probability shaping. In this case, the number of signal points with higher amplitude in the signal to be transmitted to the signal receiving terminal is small, and the number of signal points with lower amplitude is large. At this time, the phase difference calculated by the signal receiving end according to the above method has low accuracy, and the accuracy of the signal obtained by adjusting the received signal according to the phase difference is also low relative to the original signal.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a method and an apparatus for adjusting phase to improve the accuracy of the phase adjustment result. The specific technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides a phase adjustment method, applied to a signal receiving end, where the method includes:
determining signal points with amplitude values lower than a preset amplitude value according to signal values of signal points corresponding to sampling time points in a signal to be adjusted, wherein the signal values represent the amplitude values and phase values of the signal points;
increasing the amplitude of the determined signal point;
predicting a reference phase difference according to the signal value of each signal point in the signal to be adjusted, wherein the reference phase difference represents: the signal sending end sends an original signal to the signal receiving end, and the original signal is different from the signal to be adjusted in phase;
and adjusting the phase of each signal point in the signal to be adjusted before the amplitude is adjusted according to the predicted reference phase difference.
In an embodiment of the present invention, the predicting a reference phase difference according to the signal value of each signal point in the signal to be adjusted includes:
calculating a square value of the signal value of each signal point;
predicting the reference phase difference from the squared value of each signal point.
In an embodiment of the present invention, before the calculating a square value of the signal value of each signal point, the method further includes:
adjusting the phase value of each signal point in the signal to be adjusted according to a preset phase difference value;
the calculating a square value of the signal value of each signal point includes:
calculating a first square value of the signal value of each signal point before the phase value is adjusted and a second square value of the signal value of each signal point after the phase value is adjusted;
the predicting the reference phase difference according to the square value of each signal point includes:
and predicting the reference phase difference according to the first square value and the second square value obtained by calculation.
In an embodiment of the present invention, the predetermined phase difference value is
Figure BDA0002476049640000021
An odd multiple of.
In an embodiment of the present invention, the increasing the amplitude of the determined signal point includes:
multiplying the determined amplitude of the signal point by a preset multiple, wherein the preset multiple is greater than 1.
In an embodiment of the present invention, after the increasing the amplitude of the determined signal point, the method further includes:
dividing each signal point of the signal to be adjusted into a plurality of signal point clusters;
the predicting a reference phase difference according to the signal value of each signal point in the signal to be adjusted includes:
for each signal point cluster, predicting a phase difference corresponding to the signal point cluster according to the signal value of each signal point in the signal point cluster, and taking the phase difference as a reference phase difference;
the adjusting the phase of each signal point in the signal to be adjusted before the amplitude adjustment according to the predicted reference phase difference comprises:
and aiming at each signal point cluster, adjusting the phase of each signal point in the signal point cluster before amplitude adjustment according to the predicted reference phase difference corresponding to the signal point cluster.
In an embodiment of the present invention, after adjusting the phase of each signal point in the signal to be adjusted before the amplitude adjustment according to the predicted reference phase difference, the method further includes:
determining a phase value range according to the adjusted phase of each signal point;
determining a preset number of reference phases in the phase value range;
for each reference phase, when the phase value of each signal point is the reference phase, the square distance between each first position and each second position is calculated as a reference square distance, and the sum of the reference square distances is calculated, wherein the first position is: the position of the constellation point corresponding to each signal point in the constellation diagram, where the second position is: presetting the position of a standard constellation point in a standard constellation diagram, wherein for each signal point, the preset standard constellation point is as follows: constellation points with the minimum Euclidean distance between the constellation points corresponding to the signal points in the preset standard constellation diagram;
the phase value of each signal point is adjusted to a reference phase at which the sum of the reference squared distances is the minimum.
In an embodiment of the present invention, the predicting a reference phase difference according to a signal value of each signal point in the signal to be adjusted includes:
determining a signal point which is positioned at a diagonal position in a constellation diagram corresponding to a signal to be adjusted in each signal point as a central signal point;
and predicting the reference phase difference according to the signal value of each signal point in the signal to be adjusted by taking the signal value of the central signal point as a main component.
In a second aspect, an embodiment of the present invention provides a phase adjustment apparatus, applied to a signal receiving end, where the apparatus includes:
the signal point determining module is used for determining a signal point with an amplitude value lower than a preset amplitude value according to a signal value of a signal point corresponding to each sampling time point in a signal to be adjusted, wherein the signal value represents the amplitude value and the phase value of the signal point;
an amplitude increasing module for increasing the amplitude of the determined signal point;
a phase difference calculation module, configured to predict a reference phase difference according to a signal value of each signal point in the signal to be adjusted, where the reference phase difference represents: the signal sending end sends an original signal to the signal receiving end, and the original signal is different from the signal to be adjusted in phase;
and the first phase adjusting module is used for adjusting the phase of each signal point in the signal to be adjusted before the amplitude is adjusted according to the predicted reference phase difference.
In an embodiment of the present invention, the phase difference calculating module includes:
the square value calculation submodule is used for calculating the square value of the signal value of each signal point;
and the phase difference calculation submodule is used for predicting the reference phase difference according to the square value of each signal point.
In an embodiment of the present invention, the apparatus further includes:
the phase value adjusting submodule is used for adjusting the phase value of each signal point in the signal to be adjusted according to a preset phase difference value before the square value of the signal value of each signal point is calculated by the square value calculating submodule;
the square value calculation submodule is specifically configured to:
calculating a first square value of the signal value of each signal point before the phase value is adjusted and a second square value of the signal value of each signal point after the phase value is adjusted;
the phase difference calculation submodule is specifically configured to:
and predicting the reference phase difference according to the first square value and the second square value obtained by calculation. :
in an embodiment of the present invention, the predetermined phase difference value is
Figure BDA0002476049640000041
An odd multiple of.
In an embodiment of the present invention, the amplitude increasing module is specifically configured to:
multiplying the determined amplitude of the signal point by a preset multiple, wherein the preset multiple is greater than 1.
In an embodiment of the present invention, the apparatus further includes:
a signal point cluster dividing module, configured to divide each signal point of the signal to be adjusted into a plurality of signal point clusters after the amplitude increasing module increases the amplitude of the determined signal point;
the phase difference calculation module is specifically configured to:
for each signal point cluster, predicting a phase difference corresponding to the signal point cluster according to the signal value of each signal point in the signal point cluster, and taking the phase difference as a reference phase difference;
the first phase adjustment module is specifically configured to:
and aiming at each signal point cluster, adjusting the phase of each signal point in the signal point cluster before amplitude adjustment according to the predicted reference phase difference corresponding to the signal point cluster.
In an embodiment of the present invention, the apparatus further includes:
the range determining module is used for determining a phase value range according to the phase of each signal point after the first phase adjusting module adjusts the phase of each signal point in the signal to be adjusted before the amplitude adjustment according to the predicted reference phase difference;
a reference phase determining module, configured to determine a preset number of reference phases within the phase value range;
a reference phase difference calculating module, configured to calculate, for each reference phase, a square distance between each first location and each second location when the phase value of each signal point is the reference phase, as a reference square distance, and calculate a sum of the reference square distances, where the first location is: the position of the constellation point corresponding to each signal point in the constellation diagram, where the second position is: presetting the position of a standard constellation point in a standard constellation diagram, wherein for each signal point, the preset standard constellation point is as follows: constellation points with the minimum Euclidean distance between the constellation points corresponding to the signal points in the preset standard constellation diagram;
and the second phase adjustment module is used for adjusting the phase value of each signal point to be a reference phase value with the minimum sum of the reference phase differences.
In an embodiment of the present invention, the phase difference calculating module is specifically configured to:
determining a signal point which is positioned at a diagonal position in a constellation diagram corresponding to a signal to be adjusted in each signal point as a central signal point;
and predicting the reference phase difference according to the signal value of each signal point in the signal to be adjusted by taking the signal value of the central signal point as a main component.
In a third aspect, an embodiment of the present invention provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor and the communication interface complete communication between the memory and the processor through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of any of the first aspect when executing a program stored in the memory.
In a fourth aspect, the present invention provides a computer-readable storage medium, in which a computer program is stored, and the computer program, when executed by a processor, implements the method steps of any one of the first aspect.
In a fifth aspect, embodiments of the present invention also provide a computer program product comprising instructions, which when run on a computer, cause the computer to perform the method steps of any of the first aspects described above.
The embodiment of the invention has the following beneficial effects:
in the scheme provided by the embodiment of the invention, the amplitude of the signal point with lower amplitude is increased, the reference phase difference is predicted according to the signal value of each signal point, and the phase of each signal point in the signal to be adjusted before the amplitude adjustment is adjusted according to the predicted reference phase difference. Because the phase difference between the original signal sent by the signal sending end and the signal to be adjusted received by the signal receiving end is almost the same for each signal point, and the phase value of the signal point is not changed after the amplitude is increased, the reference phase difference can be obtained by prediction according to the signal value of the signal point with the increased amplitude. And because the amplitude of the signal point with lower amplitude is increased, the number of the signal points with higher amplitude can be increased, and the more the number of the signal points with higher amplitude is, the more the prediction is favorable for obtaining the accurate reference phase difference, so that the reference phase difference obtained by predicting according to the signal value of the signal point with increased amplitude is more accurate, and the accuracy of the result of phase adjustment according to the reference phase difference is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1A is a schematic flowchart of a first phase adjustment method according to an embodiment of the present invention;
fig. 1B is a schematic diagram of a constellation diagram corresponding to a first signal to be adjusted according to an embodiment of the present invention;
fig. 2A is a schematic flowchart of a second phase adjustment method according to an embodiment of the present invention;
fig. 2B is a schematic diagram of a constellation diagram corresponding to a second signal to be adjusted according to an embodiment of the present invention;
fig. 3A is a schematic flowchart of a third phase adjustment method according to an embodiment of the present invention;
fig. 3B is a schematic diagram of a constellation diagram corresponding to a third signal to be adjusted according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a fourth phase adjustment method according to an embodiment of the present invention;
fig. 5A is a schematic flowchart of a fifth phase adjustment method according to an embodiment of the present invention;
fig. 5B is a schematic structural diagram of a reference phase value determining apparatus according to an embodiment of the present invention;
fig. 6 is a schematic flowchart of a sixth phase adjustment method according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a first phase adjustment apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a second phase adjustment apparatus according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a third phase adjustment apparatus according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a fourth phase adjustment apparatus according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a fifth phase adjustment apparatus according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The phase difference obtained by prediction is low in accuracy, so that the accuracy of a signal obtained by adjusting a received signal according to the phase difference relative to an original signal is low, and in order to solve the problem, the embodiment of the invention provides a phase adjusting method and a phase adjusting device.
In an embodiment of the present invention, there is provided a phase adjustment method including:
and determining a signal point with an amplitude value lower than a preset amplitude value according to the signal value of the signal point corresponding to each sampling time point in the signal to be adjusted, wherein the signal value represents the amplitude value and the phase value of the signal point.
The amplitude of the determined signal point is increased.
Predicting a reference phase difference according to the signal value of each signal point in the signal to be adjusted, wherein the reference phase difference represents: and the signal transmitting end transmits the original signal to the signal receiving end and the phase difference between the signal to be adjusted and the original signal.
And adjusting the phase of each signal point in the signal to be adjusted before the amplitude is adjusted according to the predicted reference phase difference.
As can be seen from the above, since the phase difference between the original signal sent by the signal sending end and the signal to be adjusted received by the signal receiving end is almost the same for each signal point, and the phase value of the signal point is not changed after the amplitude is increased, the reference phase difference can also be obtained by prediction according to the signal value of the signal point with the increased amplitude. And because the amplitude of the signal point with lower amplitude is increased, the number of the signal points with higher amplitude can be increased, and the more the number of the signal points with higher amplitude is, the more the prediction is favorable for obtaining the accurate reference phase difference, so that the reference phase difference obtained by predicting according to the signal value of the signal point with increased amplitude is more accurate, and the accuracy of the result of phase adjustment according to the reference phase difference is improved.
The following describes a phase adjustment method and apparatus provided by an embodiment of the present invention with reference to specific embodiments.
Referring to fig. 1A, an embodiment of the present invention provides a flowchart of a first phase adjustment method, which is specifically applied to a signal receiving end, where the method includes the following steps S101 to S104.
S101: and determining the signal points with the amplitude values lower than the preset amplitude value according to the signal values of the signal points corresponding to the sampling time points in the signal to be adjusted.
Specifically, the signal receiving end may be an optical receiving device, and the signal to be adjusted is transmitted from an optical transmitting device to the optical receiving device through an optical fiber.
Wherein, the signal value represents the amplitude value and the phase value of the signal point. The signal value may be expressed in the form of a complex number, in a coordinate system having a real part as an abscissa and an imaginary part as an ordinate, an angle between the complex number and a coordinate axis may represent a phase value of a signal point, and a distance between the complex number and an origin of the coordinate axis may represent a magnitude of the signal point.
Specifically, after receiving the signal, the signal receiving end may perform analog-to-digital conversion and frequency offset processing on the signal to obtain the signal to be adjusted, where the analog-to-digital conversion and the frequency offset processing are related to the prior art and are not described herein again.
The time interval between the sampling time points may be 0.1ms, and the predetermined amplitude may be
Figure BDA0002476049640000081
And the like.
The preset amplitude value can be obtained by training a sample signal with a known phase difference. The preset amplitude value is related to the number of constellation points of the constellation diagram corresponding to the signal to be adjusted, the signal-to-noise ratio value of the signal to be adjusted, the degree of probability shaping of the signal to be adjusted, and the like, the number of constellation points of the constellation diagram corresponding to the signal to be adjusted, the signal-to-noise ratio value of the signal to be adjusted, or the degree of probability shaping of the signal to be adjusted are different, and the preset amplitude value is different.
S102: the amplitude of the determined signal point is increased.
Specifically, the amplitude of the determined signal point may be increased by a preset amplitude. Wherein, the value of the preset amplitude is greater than 0, for example, the preset amplitude can be
Figure BDA0002476049640000091
In addition, the amplitude of the determined signal point can be increased by the following step G:
step G: multiplying the determined magnitude of the signal point by a preset multiple.
Wherein, the preset multiple is more than 1. For example, the preset multiple may be 7/3.
The preset multiple may also be obtained by training a sample signal with a known phase difference, which is the same as the preset amplitude. The preset multiple is related to the number of constellation points of the constellation diagram corresponding to the signal to be adjusted, the signal-to-noise ratio value of the signal to be adjusted, the degree of probability shaping of the signal to be adjusted, and the like, and the number of constellation points of the constellation diagram corresponding to the signal to be adjusted, the signal-to-noise ratio value of the signal to be adjusted, or the degree of probability shaping of the signal to be adjusted are different, and the preset multiple values are different.
Referring to fig. 1B, a schematic diagram of a constellation diagram corresponding to a first signal to be adjusted is provided.
The signal transmitting end modulates the signal to be adjusted in different modulation modes, and the constellation diagrams are different. For example, if the signal transmitting end uses 64QAM (64Quadrature Amplitude Modulation ) to modulate the signal to be adjusted, the constellation diagram includes 64 constellation points; if the signal transmitting end uses 16QAM (16Quadrature Amplitude Modulation ) to modulate the signal to be adjusted, the constellation diagram includes 16 constellation points, and so on.
Specifically, fig. 1B exemplifies a case where the signal to be adjusted is modulated by 64QAM, and the phase difference between the signal to be adjusted and the original signal is 0.
The upper left corner of fig. 1B is a constellation diagram corresponding to a signal to be adjusted, where the amplitude of a signal point corresponding to a constellation point located in the middle is lower, and the amplitude of a signal point corresponding to a constellation point located around is higher. The star points are constellation points of which the amplitude of the corresponding signal points is lower than a preset amplitude, and the pentagonal points are constellation points of which the amplitude of the corresponding signal points is higher than the preset amplitude.
The upper right corner of fig. 1B is a constellation diagram formed by constellation points corresponding to the signal points whose amplitudes are increased after the amplitudes of the signal points corresponding to the star points are increased. The lower left corner of fig. 1B is a constellation diagram formed by constellation points corresponding to signal points whose amplitudes are higher than the preset amplitude, and compared with the upper left corner of fig. 1B, the positions of the constellation points are not changed because the amplitudes of the signal points are not increased.
The lower right corner of fig. 1B is a constellation diagram formed by constellation points corresponding to the signal points after combining the signal points with the increased amplitude and the signal points without the increased amplitude.
S103: and predicting the reference phase difference according to the signal value of each signal point in the signal to be adjusted.
After the amplitudes of some signal points are increased through S102, in this step, the signal to be adjusted is the signal with the amplitude of the signal point increased.
Wherein the reference phase difference indicates: and the signal transmitting end transmits the original signal to the signal receiving end and the phase difference between the signal to be adjusted and the original signal.
Specifically, the reference phase difference may be predicted by a BPS (blind phase search) method according to a signal value of each signal point in the signal to be adjusted.
In addition, the above-described reference phase difference may also be calculated according to steps S103A-S103B.
S104: and adjusting the phase of each signal point in the signal to be adjusted before the amplitude is adjusted according to the predicted reference phase difference.
Specifically, the phase value of each signal point before the amplitude adjustment may be added to the reference phase difference, thereby implementing the phase adjustment of each signal point.
As can be seen from the above, since the phase difference between the original signal sent by the signal sending end and the signal to be adjusted received by the signal receiving end is almost the same for each signal point, and the phase value of the signal point is not changed after the amplitude is increased, the reference phase difference can also be obtained by prediction according to the signal value of the signal point with the increased amplitude. And because the amplitude of the signal point with lower amplitude is increased, the number of the signal points with higher amplitude can be increased, and the more the number of the signal points with higher amplitude is, the more the prediction is favorable for obtaining the accurate reference phase difference, so that the reference phase difference obtained by predicting according to the signal value of the signal point with increased amplitude is more accurate, and the accuracy of the result of phase adjustment according to the reference phase difference is improved.
Referring to fig. 2A, the embodiment of the present invention provides a flowchart of a second phase adjustment method, and compared with the foregoing embodiment shown in fig. 1A, the above step S103 can be implemented by steps S103A-S103B.
S103A: the squared value of the signal value of each signal point is calculated.
Specifically, a square value of each signal value expressed in a complex number form may be calculated.
S103B: the reference phase difference is predicted from the square value of each signal point.
Specifically, referring to fig. 2B, a schematic diagram of a constellation diagram corresponding to the second signal to be adjusted is provided.
The left side is a constellation diagram corresponding to a signal to be adjusted before calculating the square value of the signal value, wherein the horizontal axis of the coordinate is the real part value of the constellation point, the vertical axis of the coordinate is the imaginary part value of the constellation point, and the diagram comprises 64 constellation points which are respectively represented by a triangle, a circle and a square point.
The right side is a constellation diagram corresponding to the signal to be adjusted after the square value of the signal value is calculated, wherein the horizontal axis of the coordinate is the real part value of the constellation point after the square value is calculated, the vertical axis of the coordinate is the imaginary part value of the constellation point after the square value is calculated, and the diagram comprises 64 constellation points which are respectively represented by triangular, circular and square points.
Because the signal has periodicity, and the signal value of each signal point in the signal changes periodically, the signal to be adjusted has signal points with the same signal value, and the positions of different signal points in the coordinate system may be the same, that is, the different signal points correspond to the same constellation point, so that each constellation point can represent the signal values of a plurality of signal points.
Comparing the left side of fig. 2B with the right side of fig. 2B, it can be seen that after calculating the squared values of the signal values, the circular points in the left graph are located on one side of the triangular points in the right graph, and the square points in the left graph are located on the other side of the triangular points in the right graph. A triangular point at a diagonal line in the left graph is located in the middle of the right graph, and a circular point and a square point in the right graph are axisymmetrical with the triangular point as a symmetry axis.
Therefore, the signal points located on the symmetry axis among the signal points of the signal to be adjusted can be extracted by calculating the square value, and the reference phase difference can be calculated by using the square value of the signal values of the extracted signal points as a main component.
Specifically, fig. 2B shows a case where the phase difference between the signal to be adjusted and the original signal is 0, that is, the signal to be adjusted and the original signal are the same, and when the phase difference between the signal to be adjusted and the original signal is not 0, each constellation point after the square value is calculated has symmetry in the illustrated coordinate system, and the reference phase difference can be calculated according to the difference between the signal value of the signal point corresponding to the extracted constellation point located at the symmetry axis and the signal value of the signal point corresponding to the constellation point located at the symmetry axis shown in fig. 2B.
After the square value is calculated, the reference phase difference after the signal is squared may be extracted by a power iteration method, and the reference phase difference may be determined.
As can be seen from the above, each constellation point has symmetry in a coordinate system with the real part as the abscissa and the imaginary part as the ordinate after the square value is calculated. Therefore, after calculating the square value of the signal value of each signal point, the square value of the signal point corresponding to the constellation point located at the symmetry axis can be extracted as the principal component, and the reference phase difference can be calculated from the principal component.
Referring to fig. 3A, the embodiment of the present invention provides a flow chart of a third phase adjustment method, which, compared with the foregoing embodiment shown in fig. 2A, further includes, before the step S103A, S103C:
S103C: and adjusting the phase value of each signal point in the signal to be adjusted according to the preset phase difference value.
Specifically, the predetermined phase difference value is
Figure BDA0002476049640000121
An odd multiple of, e.g.
Figure BDA0002476049640000122
And the like.
Referring to fig. 2B, each constellation point has 90 ° symmetry in the coordinate system, i.e. the phase value of the signal point corresponding to each constellation point is adjusted
Figure BDA0002476049640000123
The constellation point corresponding to the signal point after the phase value is adjusted and the constellation point corresponding to the signal point before the phase value is adjusted are mutually symmetrical.
Referring to fig. 3B, a schematic diagram of a constellation diagram corresponding to a third signal to be adjusted is provided.
As can be seen from the figure, fig. 3B is a constellation diagram formed by constellation points corresponding to each signal point after the phase value of the signal point corresponding to each constellation point in the constellation diagram on the left side of fig. 2B is adjusted by 90 °, and the constellation diagram has symmetry with the constellation diagram shown on the left side of fig. 2B with a diagonal as a symmetry axis.
In this case, the above step S103A can be realized by the following step S103a 1.
S103A 1: and calculating a first square value of the signal value of each signal point before the phase value is adjusted and a second square value of the signal value of each signal point after the phase value is adjusted.
The above step S103B may be realized by the following step S103B 1.
S103B 1: and predicting the reference phase difference according to the first square value and the second square value obtained by calculation.
If the number of the signal points with higher amplitude is small, the number of the signal points with lower amplitude is large, and the number of the signal points corresponding to each constellation point is different, after the square value of the signal value of each signal point is calculated, the number of the signal points corresponding to each constellation point after the square value is calculated is also different, so that the signal points corresponding to the symmetry axis cannot be accurately extracted after the square value is calculated, and the predicted reference phase difference is inaccurate.
Due to adjustment of phase value of each signal point
Figure BDA0002476049640000131
After odd multiple, the constellation point corresponding to each signal point and the constellation point corresponding to the signal point before the phase value is adjusted are mutually symmetrical, so that the calculated constellation point corresponding to the first square value and the calculated constellation point corresponding to the second square value are mutually symmetrical, and the constellation diagram obtained by combining the constellation points corresponding to the first square value and the second square value has symmetry. Therefore, the square value of the signal point corresponding to the constellation point positioned on the symmetry axis can be accurately extracted according to the first square value and the second square value, and the square value is used as a main component, and the reference phase difference can be obtained through prediction according to the main component.
Since the signal values of the respective signal points need to be referred to in the process of predicting the reference phase difference, in the case of a large number of signal points, a large number of signal values need to be referred to in order to predict the reference phase difference, which requires a large amount of calculation resources, and in the case of a small number of calculation resources, it is difficult to predict the reference phase difference.
Referring to fig. 4, a schematic flow chart of a fourth phase adjustment method is provided in the embodiment of the present invention, and compared with the foregoing embodiment shown in fig. 1A, before step S103, step S105 is further included.
S105: and dividing each signal point of the signal to be adjusted into a plurality of signal point clusters.
Specifically, the signal points may be averagely divided into a first preset number of signal point clusters, for example, the first preset number may be 10, and then 1000 signal points may be divided into 10 signal point clusters, where each signal point cluster includes 100 signal points.
Each signal point can be further divided into a plurality of signal point clusters in a manner that each signal point cluster contains a second preset number of signal points. For example, the first preset number may be 200, and then 1000 signal points may be divided into 5 signal point clusters, and each signal point cluster includes 200 signal points.
In this case, the above step S103 can be realized by the following step S103D. :
S103D: and for each signal point cluster, predicting a phase difference corresponding to the signal point cluster according to the signal value of each signal point in the signal point cluster, and taking the phase difference as a reference phase difference.
Specifically, the above-described reference phase difference can be predicted for each signal point cluster by the following steps H to L.
Step H: determining a feature matrix A of a kth signal point clusterk。
Wherein the content of the first and second substances,
Figure BDA0002476049640000141
k is the number of the signal point cluster, and the value of k can be any one of 0 to the total number of the signal point clusters, x'kFor the signal value of the signal point in the kth signal point cluster before the phase value is adjusted,
Figure BDA0002476049640000142
for the signal value of the signal point after the phase value adjustment in the kth signal point cluster,
Figure BDA0002476049640000143
is x'kThe square value of (a) is,
Figure BDA0002476049640000144
is composed of
Figure BDA0002476049640000145
Re () takes the real part of the squared value, Im () takes the real part of the squared valueThe imaginary value of the squared value.
Step I: calculating covariance C of kth signal point clusterk＝AkAk T。
Step J: calculating a principal component vector v of a kth signal point clusterk＝Ckvk-1And to vkIs normalized.
Wherein v isk-1Is the principal component of the (k-1) th signal point cluster.
In particular, can be represented by v1＝C1v0Calculating v1，v0Can be arbitrarily chosen, e.g., [1,0 ]]TV is calculated to obtain1After that, v is adjusted1As v0Recalculating v1V is obtained by repeating the calculation for more than 3 times1Determining to obtain v under the condition that the approximation remains unchanged before and after calculation1. Since no matter v0How the value is, v obtained by repeated calculation1Are approximately the same, so v0Any value can be taken.
In addition, v can be calculated by the following formulakIs normalized.
Figure BDA0002476049640000146
Wherein v isk[1]Is v iskValue of the first element, vk[2]Is v iskThe second element value of (2).
Step K: calculating an estimate of the reference phase difference for the kth cluster of signal points
Figure BDA0002476049640000147
Step L: the estimated value of the reference phase difference of the k-th signal point cluster obtained by calculation
Figure BDA0002476049640000148
Carrying out phase fuzzy calculation to obtain a reference phase difference
Figure BDA0002476049640000149
Wherein the content of the first and second substances,
Figure BDA00024760496400001410
the reference phase difference for the (k-1) th signal point cluster,
Figure BDA0002476049640000151
indicating a rounding down.
Specifically, in the case where k is 1,
Figure BDA0002476049640000152
take a value of
Figure BDA0002476049640000153
The above step S104 may be realized by the following step S104A.
S104A: and aiming at each signal point cluster, adjusting the phase of each signal point in the signal point cluster before amplitude adjustment according to the predicted reference phase difference corresponding to the signal point cluster.
Specifically, for each signal point cluster, the reference phase difference corresponding to the signal point cluster may be added to the phase of each signal point in the signal point cluster before the amplitude is adjusted, so as to adjust the phase of each signal point.
As can be seen from the above, by dividing the signal points into signal point clusters and calculating the reference signal values of the signal point clusters, each signal point cluster only contains a part of the signal points in the signal to be adjusted, so that the calculation resources consumed in the process of calculating each reference signal value are reduced.
Referring to fig. 5A, the embodiment of the present invention provides a schematic flow chart of a fifth phase adjustment method, which further includes steps S106-S109 after step S104, compared with the foregoing embodiment shown in fig. 1A.
S106: and determining a phase value range according to the adjusted phase of each signal point.
Specifically, the phase of each adjusted signal point can be used as a phase valueThe middle value of the range, for example, the phase value range may be the adjusted phase
Figure BDA0002476049640000154
If the adjusted phase is pi, the phase value range is
Figure BDA0002476049640000155
To
Figure BDA0002476049640000156
S107: and determining a preset number of reference phases in the phase value range.
Specifically, a preset number of reference phases may be determined at equal intervals in the phase value range, for example, the preset number may be 5, and the phase value range may be
Figure BDA0002476049640000157
To
Figure BDA0002476049640000158
The reference phase may be
Figure BDA0002476049640000159
π、
Figure BDA00024760496400001510
A preset number of reference phases may also be randomly selected within the phase range, and the reference phases may also be determined in other manners.
S108: and calculating the square distance between each first position and each second position as a reference square distance when the phase value of each signal point is the reference phase, and calculating the sum of the reference square distances.
Wherein, the first position is: the position of the constellation point corresponding to each signal point in the constellation diagram.
The second position is: and presetting the position of a standard constellation point in the standard constellation diagram for each signal point.
The preset standard constellation points are as follows: and the constellation point with the minimum Euclidean distance between the constellation points corresponding to the signal points in the preset standard constellation diagram.
Specifically, the preset standard constellation may be a constellation when a reference phase difference between the signal to be adjusted and the original signal is 0, that is, the constellation shown in fig. 2A.
S109: the phase value of each signal point is adjusted to a reference phase at which the sum of the reference squared distances is the minimum.
Because the positions of the constellation points corresponding to the signal points are closest to the positions of the preset standard constellation points on the whole when the sum of the reference square distances is minimum, and the preset standard constellation diagram is the constellation diagram under the condition that the reference phase difference between the signal to be adjusted and the original signal is 0, the signal points in the signal points and the original signal are closest to the whole when the sum of the reference square distances is minimum, and the phase value of each signal point can be adjusted to be the reference phase with the minimum sum of the reference square distances.
Referring to fig. 5B, a schematic diagram of a reference phase value determining apparatus is provided.
Specifically, the reference phase value with the minimum sum of the reference phase differences can be obtained through fig. 5B, and the device shown in fig. 5B has the same structure as the device corresponding to the BPS method in the prior art, and is not repeated herein.
As can be seen from the above, after the phase of each signal point in the signal to be adjusted is adjusted according to the predicted reference phase difference, a reference phase is selected, and when the phase value of each signal point is calculated to be the reference phase, the reference square distance between the position of the constellation point corresponding to each signal point in the constellation diagram and the position of the preset standard constellation point in the preset standard constellation diagram is selected, and the reference phase with the smallest sum of the reference square distances is selected to perform the second adjustment on the phase value of the signal point, so that the accuracy of adjusting the phase value of the signal point is further improved on the basis of the first adjustment of the phase value.
Referring to fig. 6, a flowchart of a sixth phase adjustment method is provided in the embodiment of the present invention, specifically, compared with the foregoing fig. 1A, the foregoing step S103 may be implemented by steps S103E-S103F.
S103E: and determining a signal point which is positioned at a diagonal position in a constellation diagram corresponding to the signal to be adjusted in each signal point as a central signal point.
Specifically, referring to fig. 2A, after the square value of the signal point at the diagonal position in the constellation diagram corresponding to the signal to be adjusted is calculated, the signal point is located at the symmetry axis position, so that the square value of the signal value of each signal point can be calculated, and the signal point at the diagonal position can be determined.
S103F: and predicting the reference phase difference according to the signal value of each signal point in the signal to be adjusted by taking the signal value of the central signal point as a main component.
Specifically, the reference phase difference may be predicted by a principal component analysis method using a signal value of the center signal point as a principal component.
As can be seen from the above, since the signal points at the diagonal positions in the constellation diagram corresponding to the signal to be adjusted are located at the symmetry axis positions after the square value calculation, and the signal points at the symmetry axis positions can reflect the overall situation of the signal values of the signal points, the signal values of the signal points at the diagonal positions are extracted as principal components, and the reference phase difference can be obtained through a principal component analysis method by accurate prediction.
Referring to fig. 7, an embodiment of the present invention provides a schematic structural diagram of a first phase adjustment apparatus, which is applied to a signal receiving end, where the apparatus includes:
a signal point determining module 701, configured to determine, according to a signal value of a signal point corresponding to each sampling time point in a signal to be adjusted, a signal point whose amplitude is lower than a preset amplitude, where the signal value represents an amplitude value and a phase value of the signal point;
an amplitude increasing module 702 for increasing the amplitude of the determined signal point;
a phase difference calculating module 703, configured to predict a reference phase difference according to a signal value of each signal point in the signal to be adjusted, where the reference phase difference represents: the signal sending end sends an original signal to the signal receiving end, and the original signal is different from the signal to be adjusted in phase;
a first phase adjustment module 704, configured to adjust a phase of each signal point in the signal to be adjusted before the amplitude adjustment according to the predicted reference phase difference.
As can be seen from the above, since the phase difference between the original signal sent by the signal sending end and the signal to be adjusted received by the signal receiving end is almost the same for each signal point, and the phase value of the signal point is not changed after the amplitude is increased, the reference phase difference can also be obtained by prediction according to the signal value of the signal point with the increased amplitude. And because the amplitude of the signal point with lower amplitude is increased, the number of the signal points with higher amplitude can be increased, and the more the number of the signal points with higher amplitude is, the more the prediction is favorable for obtaining the accurate reference phase difference, so that the reference phase difference obtained by predicting according to the signal value of the signal point with increased amplitude is more accurate, and the accuracy of the result of phase adjustment according to the reference phase difference is improved.
Referring to fig. 8, an embodiment of the invention provides a structural schematic diagram of a second phase adjustment apparatus, and compared with fig. 7, the phase difference calculation module 703 includes:
a square value calculation submodule 703A for calculating a square value of the signal value of each signal point;
a phase difference calculation sub-module 703B is configured to predict the reference phase difference according to the square value of each signal point.
As can be seen from the above, each constellation point has symmetry in a coordinate system with the real part as the abscissa and the imaginary part as the ordinate after the square value is calculated. Therefore, after calculating the square value of the signal value of each signal point, the square value of the signal point corresponding to the constellation point located at the symmetry axis can be extracted as the principal component, and the reference phase difference can be calculated from the principal component.
Referring to fig. 9, an embodiment of the present invention provides a schematic structural diagram of a third phase adjustment apparatus, and compared with the foregoing embodiment shown in fig. 8, the apparatus further includes:
a phase value adjusting submodule 703C, configured to adjust a phase value of each signal point in the signal to be adjusted according to a preset phase difference value before the square value of the signal value of each signal point is calculated by the square value calculating submodule 703A;
the square value calculation submodule 703A is specifically configured to:
calculating a first square value of the signal value of each signal point before the phase value is adjusted and a second square value of the signal value of each signal point after the phase value is adjusted;
the phase difference calculation sub-module 703B is specifically configured to:
and predicting the reference phase difference according to the first square value and the second square value obtained by calculation.
In an embodiment of the present invention, the predetermined phase difference value is
Figure BDA0002476049640000181
An odd multiple of.
Due to adjustment of phase value of each signal point
Figure BDA0002476049640000182
After odd multiple, the constellation point corresponding to each signal point and the constellation point corresponding to the signal point before the phase value is adjusted are mutually symmetrical, so that the calculated constellation point corresponding to the first square value and the calculated constellation point corresponding to the second square value are mutually symmetrical, and the constellation diagram obtained by combining the constellation points corresponding to the first square value and the second square value has symmetry. Therefore, the square value of the signal point corresponding to the constellation point positioned on the symmetry axis can be accurately extracted according to the first square value and the second square value, and the square value is used as a main component, and the reference phase difference can be obtained through prediction according to the main component.
In an embodiment of the present invention, the amplitude increasing module 702 is specifically configured to:
multiplying the determined amplitude of the signal point by a preset multiple, wherein the preset multiple is greater than 1.
Referring to fig. 10, an embodiment of the present invention provides a schematic structural diagram of a fourth phase adjustment apparatus, and compared with the foregoing embodiment shown in fig. 7, the apparatus further includes:
a signal point cluster dividing module 705, configured to divide each signal point of the signal to be adjusted into a plurality of signal point clusters after the amplitude increasing module 702 increases the amplitude of the determined signal point;
the phase difference calculating module 703 is specifically configured to:
for each signal point cluster, predicting a phase difference corresponding to the signal point cluster according to the signal value of each signal point in the signal point cluster, and taking the phase difference as a reference phase difference;
the first phase adjustment module 704 is specifically configured to:
and aiming at each signal point cluster, adjusting the phase of each signal point in the signal point cluster before amplitude adjustment according to the predicted reference phase difference corresponding to the signal point cluster.
As can be seen from the above, by dividing the signal points into signal point clusters and calculating the reference signal values of the signal point clusters, each signal point cluster only contains a part of the signal points in the signal to be adjusted, so that the calculation resources consumed in the process of calculating each reference signal value are reduced.
Referring to fig. 11, an embodiment of the present invention provides a schematic structural diagram of a fifth phase adjustment apparatus, and compared with the foregoing embodiment shown in fig. 7, the apparatus further includes:
a range determining module 706, configured to determine a phase value range according to the phase of each signal point after the first phase adjusting module 704 adjusts the phase of each signal point in the signal to be adjusted before the amplitude adjustment according to the predicted reference phase difference, and according to the phase of each signal point after the adjustment;
a reference phase determining module 707, configured to determine a preset number of reference phases within the phase value range;
a reference phase difference calculating module 708, configured to calculate, for each reference phase, a squared distance between each first location and each second location when the phase value of each signal point is the reference phase, as a reference squared distance, and calculate a sum of the respective reference squared distances, where the first location is: the position of the constellation point corresponding to each signal point in the constellation diagram, where the second position is: presetting the position of a standard constellation point in a standard constellation diagram, wherein for each signal point, the preset standard constellation point is as follows: constellation points with the minimum Euclidean distance between the constellation points corresponding to the signal points in the preset standard constellation diagram;
a second phase adjustment module 709, configured to adjust the phase value of each signal point to a reference phase value with a minimum sum of the reference phase differences.
As can be seen from the above, after the phase of each signal point in the signal to be adjusted is adjusted according to the predicted reference phase difference, a reference phase is selected, and when the phase value of each signal point is calculated to be the reference phase, the reference square distance between the position of the constellation point corresponding to each signal point in the constellation diagram and the position of the preset standard constellation point in the preset standard constellation diagram is selected, and the reference phase with the smallest sum of the reference square distances is selected to perform the second adjustment on the phase value of the signal point, so that the accuracy of adjusting the phase value of the signal point is further improved on the basis of the first adjustment of the phase value.
In an embodiment of the present invention, the phase difference calculating module 703 is specifically configured to:
determining a signal point which is positioned at a diagonal position in a constellation diagram corresponding to a signal to be adjusted in each signal point as a central signal point;
and predicting the reference phase difference according to the signal value of each signal point in the signal to be adjusted by taking the signal value of the central signal point as a main component.
As can be seen from the above, since the signal points at the diagonal positions in the constellation diagram corresponding to the signal to be adjusted are located at the symmetry axis positions after the square value calculation, and the signal points at the symmetry axis positions can reflect the overall situation of the signal values of the signal points, the signal values of the signal points at the diagonal positions are extracted as principal components, and the reference phase difference can be obtained through a principal component analysis method by accurate prediction.
An embodiment of the present invention further provides an electronic device, as shown in fig. 12, including a processor 1201, a communication interface 1202, a memory 1203, and a communication bus 1204, where the processor 1201, the communication interface 1202, and the memory 1203 complete mutual communication through the communication bus 1204,
a memory 1203 for storing a computer program;
the processor 1201 is configured to implement the steps of any of the phase adjustment methods described above when executing the program stored in the memory 1203.
When the electronic device provided by the embodiment of the invention is applied to phase adjustment, the phase difference between the original signal sent by the signal sending end and the signal to be adjusted received by the signal receiving end is almost the same for each signal point, and the phase value of the signal point is not changed after the amplitude is increased, so that the reference phase difference can be obtained by prediction according to the signal value of the signal point with the increased amplitude. And because the amplitude of the signal point with lower amplitude is increased, the number of the signal points with higher amplitude can be increased, and the more the number of the signal points with higher amplitude is, the more the prediction is favorable for obtaining the accurate reference phase difference, so that the reference phase difference obtained by predicting according to the signal value of the signal point with increased amplitude is more accurate, and the accuracy of the result of phase adjustment according to the reference phase difference is improved.
The communication bus mentioned in the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the electronic equipment and other equipment.
The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
In yet another embodiment of the present invention, a computer-readable storage medium is further provided, in which a computer program is stored, and the computer program realizes the steps of any one of the above phase adjustment methods when executed by a processor.
When the phase adjustment is performed by applying the computer program stored in the computer-readable storage medium provided in this embodiment, since the phase difference between the original signal sent by the signal sending end and the signal to be adjusted received by the signal receiving end is almost the same for each signal point, and the phase value of the signal point is not changed after the amplitude is increased, the phase difference can also be used for predicting and obtaining the reference phase difference according to the signal value of the signal point with the increased amplitude. And because the amplitude of the signal point with lower amplitude is increased, the number of the signal points with higher amplitude can be increased, and the more the number of the signal points with higher amplitude is, the more the prediction is favorable for obtaining the accurate reference phase difference, so that the reference phase difference obtained by predicting according to the signal value of the signal point with increased amplitude is more accurate, and the accuracy of the result of phase adjustment according to the reference phase difference is improved.
In a further embodiment provided by the present invention, there is also provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the steps of any of the phase adjustment methods of the above embodiments.
When the phase adjustment is performed by applying the computer program stored in the computer-readable storage medium provided in this embodiment, since the phase difference between the original signal sent by the signal sending end and the signal to be adjusted received by the signal receiving end is almost the same for each signal point, and the phase value of the signal point is not changed after the amplitude is increased, the phase difference can also be used for predicting and obtaining the reference phase difference according to the signal value of the signal point with the increased amplitude. And because the amplitude of the signal point with lower amplitude is increased, the number of the signal points with higher amplitude can be increased, and the more the number of the signal points with higher amplitude is, the more the prediction is favorable for obtaining the accurate reference phase difference, so that the reference phase difference obtained by predicting according to the signal value of the signal point with increased amplitude is more accurate, and the accuracy of the result of phase adjustment according to the reference phase difference is improved.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus, the electronic device, the computer-readable storage medium and the computer program product, since they are substantially similar to the method embodiments, the description is relatively simple, and in relation to them, reference may be made to the partial description of the method embodiments.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. A method for adjusting phase, applied to a signal receiving end, the method comprising:
determining signal points with amplitude values lower than a preset amplitude value according to signal values of signal points corresponding to sampling time points in a signal to be adjusted, wherein the signal values represent the amplitude values and phase values of the signal points;
increasing the amplitude of the determined signal point;
predicting a reference phase difference according to the signal value of each signal point in the signal to be adjusted, wherein the reference phase difference represents: the signal sending end sends an original signal to the signal receiving end, and the original signal is different from the signal to be adjusted in phase;
and adjusting the phase of each signal point in the signal to be adjusted before the amplitude is adjusted according to the predicted reference phase difference.
2. The method of claim 1, wherein predicting a reference phase difference according to the signal values of the signal points in the signal to be adjusted comprises:
calculating a square value of the signal value of each signal point;
predicting the reference phase difference from the squared value of each signal point.
3. The method of claim 2, further comprising, prior to said computing the squared value of the signal value for each signal point:
adjusting the phase value of each signal point in the signal to be adjusted according to a preset phase difference value;
the calculating a square value of the signal value of each signal point includes:
calculating a first square value of the signal value of each signal point before the phase value is adjusted and a second square value of the signal value of each signal point after the phase value is adjusted;
the predicting the reference phase difference according to the square value of each signal point includes:
and predicting the reference phase difference according to the first square value and the second square value obtained by calculation.
4. The method of claim 3,
the preset phase difference value is
Figure FDA0002476049630000011
An odd multiple of.
5. The method of any of claims 1-4, wherein said increasing the amplitude of the determined signal points comprises:
multiplying the determined amplitude of the signal point by a preset multiple, wherein the preset multiple is greater than 1.
6. The method of claim 1, further comprising, after said increasing the amplitude of the determined signal point:
dividing each signal point of the signal to be adjusted into a plurality of signal point clusters;
the predicting a reference phase difference according to the signal value of each signal point in the signal to be adjusted includes:
for each signal point cluster, predicting a phase difference corresponding to the signal point cluster according to the signal value of each signal point in the signal point cluster, and taking the phase difference as a reference phase difference;
the adjusting the phase of each signal point in the signal to be adjusted before the amplitude adjustment according to the predicted reference phase difference comprises:
and aiming at each signal point cluster, adjusting the phase of each signal point in the signal point cluster before amplitude adjustment according to the predicted reference phase difference corresponding to the signal point cluster.
7. The method according to claim 1, wherein after adjusting the phase of each signal point in the signal to be adjusted before the amplitude adjustment according to the predicted reference phase difference, the method further comprises:
determining a phase value range according to the adjusted phase of each signal point;
determining a preset number of reference phases in the phase value range;
for each reference phase, when the phase value of each signal point is the reference phase, the square distance between each first position and each second position is calculated as a reference square distance, and the sum of the reference square distances is calculated, wherein the first position is: the position of the constellation point corresponding to each signal point in the constellation diagram, where the second position is: presetting the position of a standard constellation point in a standard constellation diagram, wherein for each signal point, the preset standard constellation point is as follows: constellation points with the minimum Euclidean distance between the constellation points corresponding to the signal points in the preset standard constellation diagram;
the phase value of each signal point is adjusted to a reference phase at which the sum of the reference squared distances is the minimum.
8. The method of claim 1, wherein predicting a reference phase difference according to the signal values of the signal points in the signal to be adjusted comprises:
determining a signal point which is positioned at a diagonal position in a constellation diagram corresponding to a signal to be adjusted in each signal point as a central signal point;
and predicting the reference phase difference according to the signal value of each signal point in the signal to be adjusted by taking the signal value of the central signal point as a main component.
9. A phase adjustment apparatus, applied to a signal receiving end, the apparatus comprising:
the signal point determining module is used for determining a signal point with an amplitude value lower than a preset amplitude value according to a signal value of a signal point corresponding to each sampling time point in a signal to be adjusted, wherein the signal value represents the amplitude value and the phase value of the signal point;
an amplitude increasing module for increasing the amplitude of the determined signal point;
a phase difference calculation module, configured to predict a reference phase difference according to a signal value of each signal point in the signal to be adjusted, where the reference phase difference represents: the signal sending end sends an original signal to the signal receiving end, and the original signal is different from the signal to be adjusted in phase;
and the first phase adjusting module is used for adjusting the phase of each signal point in the signal to be adjusted before the amplitude is adjusted according to the predicted reference phase difference.
10. An electronic device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing mutual communication by the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of any of claims 1 to 8 when executing a program stored in the memory.
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