CN116016075B - Phase discrimination preprocessing method, device, circuit, equipment and storage medium - Google Patents

Abstract

The embodiment of the application provides a phase discrimination preprocessing method, a device, a circuit, equipment and a storage medium, relating to the technical field of digital communication, wherein the scheme comprises the following steps: a first constellation diagram of a mixed signal is acquired, wherein the mixed signal is a signal obtained by mixing a modulating signal with a local carrier signal. And processing the vector points in the first constellation according to a second constellation so that the included angle between each vector point in the processed first constellation and the positive half axis of the I axis in the first constellation is the same, wherein the second constellation is used for reflecting a plurality of vector points of signal distribution of the mixed signal in IQ coordinates under the condition that the carrier wave of the modulated signal is the same as the local carrier wave. And taking the included angle between any vector point in the processed first constellation diagram and the positive half axis of the I axis in the processed first constellation diagram as the phase difference of the phase discrimination of the mixing signal. The scheme is used for solving the technical problems of square loss during phase discrimination pretreatment and huge calculated amount during high-order modulation.

Description

Phase discrimination preprocessing method, device, circuit, equipment and storage medium

Technical Field

The present application relates to the field of digital communications technologies, and in particular, to a method, an apparatus, a circuit, a device, and a storage medium for phase demodulation preprocessing.

Background

In modern digital communication, a local coherent carrier is recovered by coherently demodulating a modulated signal in a receiver, and dynamic tracking of carrier frequency and phase of the modulated signal input by the receiver is realized through a Costas loop (Costas loop), so that the phase or frequency of the local carrier is consistent with the carrier in the modulated signal. The phase detector contained within the costas loop is typically used to measure the phase error value of the loop where the signal to be input to the phase detector is typically a phase continuous signal. Whereas for phase modulated signals (e.g., BPSK, QPSK, 8 PSK) and quadrature amplitude modulated signals (e.g., 8QAM, 16 APSK), etc., phase discrimination preprocessing is required before phase discrimination. In the prior art, the phase discrimination preprocessing performs square operation on the BPSK signal and QPSK signal through N times of operation, however, noise energy accumulation caused by the N times of operation can cause loop signal-to-noise ratio loss, namely square loss; and the operation amount is huge when the high-order modulated signals are processed, so that the consumption of hardware resources and the calculation time delay of signal processing are caused.

Disclosure of Invention

The embodiment of the application provides a phase discrimination preprocessing method, a device, a circuit, equipment and a storage medium, which are used for solving the technical problems of square loss during phase discrimination preprocessing and huge calculated amount during high-order modulation.

In a first aspect, an embodiment of the present application provides a method for phase demodulation pretreatment, where the method includes: and acquiring a first constellation diagram of a mixed signal, wherein the mixed signal is a signal obtained by mixing a modulated signal with a local carrier signal, and the first constellation diagram is used for reflecting a plurality of vector points of signal distribution of the mixed signal in an IQ coordinate. And processing the vector points in the first constellation diagram according to a second constellation diagram so that the included angle between each vector point in the processed first constellation diagram and the positive half axis of the I axis is the same, wherein the second constellation diagram is used for reflecting a plurality of vector points of signal distribution of the mixed signal in the IQ coordinates under the condition that the carrier wave of the modulated signal is the same as the local carrier wave. And taking the included angle between any vector point in the processed first constellation diagram and the positive half axis of the I axis as the phase difference of the phase discrimination of the mixing signal.

The embodiment of the application provides a phase discrimination preprocessing method, wherein a first constellation diagram of a mixing signal is obtained, the mixing signal is a signal obtained by mixing a modulating signal with a local carrier signal, the first constellation diagram is used for reflecting a plurality of vector points of signal distribution of the mixing signal in an IQ coordinate, so that the distribution condition of the modulating signal in the constellation diagram can be intuitively obtained, and because the vector points in the second constellation diagram are datum points of corresponding vector points in the first constellation diagram, the included angle between the datum points in the second constellation diagram and the corresponding vector points in the first constellation diagram is a phase difference of phase discrimination of the mixing signal, the vector points in the first constellation diagram can be processed according to the second constellation diagram, so that the included angle between each vector point in the processed first constellation diagram and a positive half axis of an I axis is the same, and the square loss and the large calculated amount of high-order modulation during phase discrimination preprocessing can be solved.

In one possible implementation manner of the present application, the processing the vector points in the first constellation according to the second constellation so that the angles between the vector points in the processed first constellation and the positive half axis of the I-axis are the same includes: at least one first included angle between at least one first vector point in the second constellation and a positive half-axis of the I-axis in the second constellation is determined, respectively, the first vector point being located in a first quadrant of the second constellation and/or the positive half-axis of the I-axis. And adjusting one or more vector points in the first constellation diagram according to a first preset direction according to at least one first included angle, so that the included angle between any vector point in the first constellation diagram after processing and the positive half axis of the I axis in the first constellation diagram after processing is the same, wherein the first preset direction comprises a clockwise direction or a anticlockwise direction.

In one possible implementation manner of the present application, according to at least one first included angle, adjusting one or more vector points corresponding to the first constellation diagram according to a preset direction, so that the included angle between any vector point in the processed first constellation diagram and the positive half axis of the I axis is the same, including: according to at least one first included angle, one or more corresponding vector points in the first constellation diagram are adjusted according to a first preset direction to obtain a third constellation diagram, the third constellation diagram at least comprises two vector points, and the included angle between the two vector points in the third constellation diagram and the positive half axis of the I axis is different by pi. And adjusting at least one second vector point in the third constellation diagram to obtain the processed first constellation diagram, wherein the second vector point is positioned in the negative direction of the I axis in the third constellation diagram.

In one possible implementation manner of the present application, according to at least one first included angle, one or more vector points corresponding to the first constellation diagram are adjusted according to a first preset direction, so as to obtain a third constellation diagram, including: and adjusting vector points in the negative direction of the Q axis in the first constellation diagram to obtain a fourth constellation diagram, wherein the vector points in the fourth constellation diagram are in the positive direction of the Q axis in the fourth constellation diagram. And according to at least one first included angle, adjusting the vector point in the first quadrant in the fourth constellation diagram in the clockwise direction, and adjusting the vector point in the second quadrant in the fourth constellation diagram in the anticlockwise direction, so as to obtain a third constellation diagram.

In one possible implementation manner of the present application, according to at least one first included angle, one or more vector points corresponding to the first constellation diagram are adjusted according to a first preset direction, so as to obtain a third constellation diagram, including: and according to at least one first included angle, adjusting one or more corresponding vector points in the first constellation diagram according to a first preset sequence to obtain a fifth constellation diagram, wherein the vector points in the fifth constellation diagram are not overlapped with each other. And adjusting a third vector point in the fifth constellation diagram according to a second preset direction to obtain a third constellation diagram, wherein the second preset direction comprises a clockwise direction or a anticlockwise direction, and the distance between the third vector point and an I axis in the fifth constellation diagram is larger than the distance between the third vector point and a Q axis in the fifth constellation diagram.

In one possible implementation of the application, the modulated signal comprises at least a phase modulated signal and a quadrature amplitude modulated signal.

In a second aspect, embodiments of the present application provide a phase detection preprocessing apparatus, where the phase detection preprocessing apparatus may implement the method in the first aspect or any possible implementation manner of the first aspect, and thus may also implement the beneficial effect in the first aspect or any possible implementation manner of the first aspect. The means for phase-discriminating preprocessing may be a phase-discriminating preprocessing device, or may be means for supporting the phase-discriminating preprocessing device to implement the method of the first aspect or any possible implementation manner of the first aspect, for example, a chip or a control circuit applied in the phase-discriminating preprocessing device. The phase discrimination preprocessing device can realize the method through software, hardware or corresponding software executed through hardware.

As an example, an embodiment of the present application provides a phase-discriminating preprocessing apparatus, which is a phase-discriminating preprocessing device or a chip applied in the phase-discriminating preprocessing device, including: the system comprises an acquisition unit and a processing unit, wherein the acquisition unit is used for acquiring a first constellation diagram of a mixed signal, the mixed signal is a signal obtained by mixing a modulating signal with a local carrier signal, and the first constellation diagram is used for reflecting a plurality of vector points of signal distribution of the mixed signal in an IQ coordinate. The processing unit is used for processing the vector points in the first constellation diagram according to the second constellation diagram so that the included angle between each vector point in the processed first constellation diagram and the positive half axis of the I axis in the first constellation diagram is the same, and the second constellation diagram is used for reflecting a plurality of vector points of signal distribution of the mixed signal in the IQ coordinates under the condition that the carrier wave of the modulated signal is the same as the local carrier wave. The processing unit is further configured to use an included angle between any one of vector points in the processed first constellation diagram and a positive half axis of the I axis in the processed first constellation diagram as a phase difference of phase discrimination of the mixing signal.

In one possible implementation of the present application, the processing unit is further configured to determine at least one first included angle between at least one first vector point in the second constellation diagram and a positive half axis of the I-axis in the second constellation diagram, where the first vector point is located in a first quadrant of the second constellation diagram and/or the positive half axis of the I-axis, and adjust one or more vector points in the first constellation diagram according to a first preset direction according to the at least one first included angle, so that an included angle between any vector point in the first constellation diagram after processing and the positive half axis of the I-axis in the first constellation diagram after processing is the same, and the first preset direction includes a clockwise direction or a counterclockwise direction.

In one possible implementation manner of the present application, the processing unit is further configured to adjust, according to at least one first included angle and according to a first preset direction, one or more corresponding vector points in the first constellation diagram to obtain a third constellation diagram, where the third constellation diagram includes at least two vector points, and an included angle between the two vector points in the third constellation diagram and a positive half axis of the I-axis differs by pi, adjust at least one second vector point in the third constellation diagram, and obtain a processed first constellation diagram, where the second vector point is located in a negative direction of the I-axis in the third constellation diagram.

In one possible implementation manner of the present application, the processing unit is further configured to adjust a vector point in the first constellation diagram in a negative direction of the Q axis to obtain a fourth constellation diagram, adjust a vector point in the fourth constellation diagram in a first quadrant according to at least one first included angle in a clockwise direction, and adjust a vector point in the fourth constellation diagram in a second quadrant according to a counterclockwise direction to obtain a third constellation diagram.

In one possible implementation manner of the present application, the processing unit is further configured to adjust, according to at least one first included angle and according to a first preset sequence, one or more corresponding vector points in the first constellation diagram to obtain a fifth constellation diagram, where the vector points in the fifth constellation diagram do not overlap with each other, and adjust, according to a second preset direction, a third vector point in the fifth constellation diagram to obtain a third constellation diagram, where the second preset direction includes a clockwise direction or a counterclockwise direction, and a distance between the third vector point and an I axis in the fifth constellation diagram is greater than a distance between the third vector point and a Q axis in the fifth constellation diagram.

In a third aspect, embodiments of the present application provide a phase locked loop circuit comprising a phase discrimination preprocessing device for implementing a method of phase discrimination preprocessing as described in any one of the possible implementations of the first aspect to the first aspect.

In one possible implementation of the application, the phase-locked loop circuit further comprises a digitally controlled oscillator, a loop filter and a phase detector.

In a fourth aspect, an embodiment of the present application provides a phase-discriminating preprocessing device, including a memory, a processor and a computer program stored in said memory and executable on the processor, the phase-discriminating preprocessing device implementing a method of phase-discriminating preprocessing as described in any one of the possible implementations of the first aspect to the first aspect when the computer program is executed by the processor.

In a fifth aspect, embodiments of the present application provide a computer readable storage medium having stored therein a computer program or instructions which, when run on a computer, cause the computer to perform a method of phase-discriminating preprocessing as described in any one of the possible implementations of the first aspect to the first aspect.

In a sixth aspect, embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform a method of phase-discriminating preprocessing as described in the first aspect or in various possible implementations of the first aspect.

In a seventh aspect, embodiments of the present application provide an apparatus for phase-discriminating preprocessing for implementing various methods in various possible designs of the first aspect or any one of the first aspects. The phase-discriminating preprocessing means may be the above-mentioned phase-discriminating preprocessing device, or a device comprising the above-mentioned phase-discriminating preprocessing device, or a component (e.g., a chip) applied to the phase-discriminating preprocessing device.

It should be understood that the apparatus for phase detection preprocessing described in the seventh aspect includes a module, a unit, the module, and the unit that implement the corresponding methods described in the seventh aspect may be implemented by hardware, implemented by software, or implemented by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the functions described above.

In an eighth aspect, an embodiment of the present application provides a phase-discriminating pretreatment apparatus, where the phase-discriminating pretreatment apparatus includes: at least one processor. Wherein the processor executes computer-executable instructions or programs stored in the phase-discriminating preprocessing device when the phase-discriminating preprocessing device is running, to cause the phase-discriminating preprocessing device to perform the method as in any of the various possible designs of the first aspect described above. For example, the phase-discriminating preprocessing means may be a phase-discriminating preprocessing device or a component applied in the phase-discriminating preprocessing device.

It will be appreciated that the processor described in the eighth aspect may further include: a bus and a memory for storing code and data. Optionally, the at least one processor sense interface and the memory are coupled to each other.

In a ninth aspect, embodiments of the present application provide a chip comprising a processor for running a computer program or instructions to implement the method of phase-discriminating preprocessing described in the first aspect or in various possible implementations of the first aspect.

Drawings

Fig. 1 is a schematic flow chart of a phase discrimination pretreatment method according to an embodiment of the present application;

fig. 2 is a schematic flow chart of BPSK signal processing according to an embodiment of the application;

fig. 3 is a schematic flow chart of QPSK signal processing according to an embodiment of the present application;

fig. 4 is a schematic flow chart of 8PSK signal processing according to an embodiment of the present application;

fig. 5 is a schematic flow chart of 8QAM signal processing according to an embodiment of the present application;

fig. 6 is a schematic flow chart of 16QAM signal processing according to an embodiment of the present application;

fig. 7 is a schematic flow chart of 16APSK signal processing according to an embodiment of the present application;

fig. 8 is a schematic diagram of a phase-locked loop circuit according to an embodiment of the present application;

Fig. 9 is a schematic structural diagram of a phase detection preprocessing device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a phase detection pretreatment device according to an embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in this description is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

The phase-locked loop (Phase Locked Loop, PLL) is a negative feedback closed-loop control circuit for controlling the frequency and phase of an internal oscillation signal of a loop by receiving an external input signal, thereby realizing automatic tracking of the frequency and phase of the input signal and synchronizing the frequency and phase of the internal oscillation signal and the input signal, and is widely applied to the technical fields of demodulation technology, frequency synthesis and the like. Among other things, in demodulation techniques, phase-locked loops may be applied to carrier tracking loops, such as a costas loop.

In modern digital communications, the costas loop employs phase-locked loop technology, which has the ability to keep the frequency and phase of the local carrier consistent with the frequency and phase of the transmitted carrier of the modulated signal, i.e., by dynamically tracking the frequency and phase of the transmitted carrier of the modulated signal in the receiver, thereby demodulating the modulated signal.

The phase detector is generally used to measure the phase error of a loop, and a signal required to be input into the phase detector in the loop is generally a signal with continuous phase. For phase modulated signals and quadrature amplitude modulated signals, the carrier phase is suddenly changed due to the influence of symbol modulation, and the suddenly changed phase point influences the phase discrimination accuracy. Therefore, when the modulated signal is subjected to signal carrier phase extraction, the influence of symbol modulation on the phase needs to be eliminated, which is commonly called phase discrimination preprocessing. In the prior art, the phase discrimination preprocessing performs square operation on a Binary Phase Shift Keying (BPSK) signal and performs fourth-time operation on a Quadrature Phase Shift Keying (QPSK) (Quadrature Phase Shift Keying) signal through N times operation, however, loop signal-to-noise ratio loss, namely square loss, is caused by noise energy accumulation caused by the N times operation; and the operation amount is huge when the high-order modulated signals are processed, so that the consumption of hardware resources and the calculation time delay of signal processing are caused. Wherein the high order modulation signal comprises: an 8PSK (Phase Shift Keying) signal, an 8QAM (Quadrature Amplitude Modulation) signal, a 16QAM signal, a 16APSK (amplitude phase shift keying) signal.

Therefore, the scheme provided by the application is a method, a device, a circuit, equipment and a storage medium for phase discrimination pretreatment, and is used for solving the technical problems of square loss during phase discrimination pretreatment and huge calculation amount during high-order modulation. In order to illustrate the technical scheme of the application, the following description is made by specific examples.

In the embodiment of the present application, the specific structure of the execution subject of the phase discrimination preprocessing method is not particularly limited as long as communication can be performed by the phase discrimination preprocessing method according to the embodiment of the present application by running a program in which the code of the phase discrimination preprocessing method of the embodiment of the present application is recorded. For example, the execution body of a phase detection preprocessing method provided by the embodiment of the application may be a functional module in the phase detection preprocessing device, which can call a program and execute the program, or a device, such as a chip, applied in the phase detection preprocessing device. The application is not limited in this regard. The following embodiments will be described taking an execution subject of a phase discrimination preprocessing method as an example of a phase discrimination preprocessing apparatus.

As shown in fig. 1, fig. 1 shows a flow chart of a phase discrimination preprocessing method provided by an embodiment of the present application, including:

Step 110, the phase demodulation preprocessing device acquires a first constellation of the mixed signal.

The mixed signal is a signal obtained by mixing the modulated signal with the local carrier signal, and the first constellation diagram is used for reflecting a plurality of vector points of signal distribution of the mixed signal in an IQ coordinate.

It can be understood that in the phase-locked loop circuit, after the modulation signal is mixed with the local carrier signal in the I path and the Q path in the phase-locked loop circuit respectively for down-conversion, the frequency multiplication signal is filtered through low-pass filtering, and then the mixed signal required by the phase-discrimination preprocessing device can be obtained.

It should be explained that IQ coordinates are mainly applied to digital modulation signals. Where the I axis is the real part and the Q axis is the imaginary part, any vector point can be expressed in terms of (I+jQ). The amplitude and phase of the signals of the I path and the Q path are overlapped and mapped on the graph to form a constellation diagram (Constellation Diagram) of the signals.

Specifically, the distance between each vector point and the origin in the constellation diagram is used to represent an amplitude value of the mixed signal, and the included angle between each vector point and the I-axis is used to represent a phase value of the mixed signal. In other words, after the amplitude value and the phase value of the mixing signal are determined for any one mixing signal, the constellation of the mixing signal may be determined according to the amplitude value and the phase value of the mixing signal.

Illustratively, the phase detection preprocessing device represents the amplitude value and the phase value of each signal point in the mixed signal with a vector point in the constellation, thereby obtaining a first constellation of the mixed signal. The amplitude and phase magnitude of each signal point can be visually reflected by means of the first constellation diagram.

It will be appreciated that the constellation helps to define the amplitude and phase of the mixing signal, and that in particular in the case where in IQ coordinates a co-directional carrier (I-path carrier) and a quadrature carrier (Q-path carrier) are required to process the modulation signal to obtain the mixing signal, the amplitude and phase of a vector point in the mixing signal can be visually seen in the constellation.

As an example, the mixed signal is a BPSK signal, which is also called a bi-phase shift keying signal, and information is transferred by a change in phase. As shown in fig. 2 (a), the coordinates of the vector points in the second constellation of the BPSK signal are A2 (1, 0) and B2 (-1, 0).

And 120, the phase demodulation preprocessing equipment processes the vector points in the first constellation diagram according to the second constellation diagram, so that the included angle between each vector point in the processed first constellation diagram and the positive half axis of the I axis is the same.

The second constellation is used for reflecting a plurality of vector points of signal distribution of the mixed signal in the IQ coordinates under the condition that the carrier wave of the modulated signal is the same as the local carrier wave. In other words, the vector points of the second constellation are the reference points of the corresponding vector points in the first constellation.

It will be appreciated that in a phase locked loop circuit, the local carrier provided by the digitally controlled oscillator may or may not be the same as the carrier of the modulated signal.

As an example, in case that the carrier of the modulated signal is identical to the local carrier, there is no phase difference between the phase of the modulated signal received by the phase-locked loop circuit and the mixed signal after low-pass filtering. In this case, in the mixed signal, each vector point is represented in the constellation (i.e., the second constellation) as having no offset from the modulated signal.

As another example, in the case where the carrier of the modulated signal is not the same as the local carrier, there is a phase difference between the phase of the modulated signal received by the phase-locked loop circuit and the mixed signal after low-pass filtering. In this case, each vector point is represented in the constellation (i.e., the first constellation) as having an offset from the modulated signal in the mixed signal. In other words, in the case that the carrier of the modulated signal is different from the local carrier, any vector point in the first constellation of the mixed signal may find a corresponding vector point in the second constellation of the mixed signal as a reference point of any vector point in the first constellation. Thus, by comparing the angles at which the vector points in the first constellation are offset with respect to the second constellation, the phase difference of the modulated signals can be obtained.

And 130, the phase discrimination preprocessing equipment takes the included angle between any vector point in the processed first constellation diagram and the positive half axis of the I axis as the phase difference of the phase discrimination of the mixed signal.

The embodiment of the application provides a phase discrimination preprocessing method, wherein a phase discrimination preprocessing device acquires a first constellation diagram of a mixed signal, the mixed signal is a signal obtained by mixing a modulated signal with a local carrier signal, the first constellation diagram is used for reflecting a plurality of vector points of signal distribution of the mixed signal in an IQ coordinate, so that the distribution condition of the modulated signal in the constellation diagram can be intuitively obtained, and because the vector points in the second constellation diagram are datum points of corresponding vector points in the first constellation diagram, the included angle between the datum points in the second constellation diagram and the corresponding vector points in the first constellation diagram is a phase difference of phase discrimination of the mixed signal, the vector points in the first constellation diagram can be processed according to the second constellation diagram, so that the included angle between each vector point in the first constellation diagram after processing and a positive half axis of an I axis is the same, and the phase difference between any vector point in the first constellation diagram after processing and the positive half axis of the I axis is taken as the phase difference of phase discrimination of the mixed signal, thus the technical problem of huge calculation amount during phase discrimination preprocessing can be solved.

In one possible embodiment of the present application, the above step 120 may be implemented by: the phase detection preprocessing device respectively determines at least one first included angle between at least one first vector point in the second constellation diagram and a positive half axis of an I axis in the second constellation diagram. And the phase discrimination preprocessing equipment adjusts one or more vector points in the first constellation diagram according to at least one first included angle and a first preset direction so that the included angle between any vector point in the processed first constellation diagram and the positive half axis of the I axis is the same.

Wherein the first vector point is located in a first quadrant of the second constellation diagram and/or a positive half-axis of the I-axis, and the first preset direction comprises a clockwise direction or a counterclockwise direction.

It will be appreciated that in the case where the mixing signal is a BPSK signal, a QPSK signal, or the like, as shown in fig. 2 (a) or fig. 3 (a), white vector points A2, B2 in the (a) represent vector points of the mixing signal in the second constellation. The BPSK signal has a first vector point B2 in the second constellation, and correspondingly, a first angle is formed between a vector point in the second constellation. The QPSK signal has a first vector point A2 in the second constellation, and correspondingly, a first angle in the second constellation.

It can be appreciated that, since the included angle between any vector point in the processed first constellation diagram and the positive half axis of the I-axis is the same, all vector points in the processed first constellation diagram are located in the same quadrant, wherein the rotated vector point is covered by the vector point at the corresponding position. Specifically, the vector point distribution of the processed first constellation may refer to the graph (c) shown in fig. 2, where the vector point B1 is covered by the vector point A1, or refer to the graph (e) shown in any of fig. 3 to 6.

In a possible embodiment of the present application, the phase detection preprocessing device determines at least one first included angle between at least one first vector point in the second constellation diagram and a positive half axis of the I-axis, respectively, including: and the phase discrimination preprocessing equipment adjusts one or more vector points corresponding to the first constellation diagram according to at least one first included angle and a first preset sequence to obtain a third constellation diagram. And the phase discrimination preprocessing equipment adjusts at least one second vector point in the third constellation diagram to obtain a processed first constellation diagram.

The third constellation diagram at least comprises two vector points, and the included angle between the two vector points and the positive half axis of the I axis is different by pi. The second vector point is located in the negative direction of the I-axis.

It will be appreciated that one vector point in the third constellation exists with another vector point symmetrical about the origin. The second vector point in the third star map is located in the negative direction of the I-axis, in other words, the second vector point may be located in the second quadrant, or may be located in the third quadrant, or may be located in the negative half-axis of the I-axis. In other words, since the vector points in the third constellation are symmetrical about the origin, the vector points in the processed first constellation lie in the positive direction of the I-axis. As for the distribution of vector points in the third star map, reference may be made to the (b) map shown in fig. 2, or to the (d) maps shown in fig. 3 to 7.

As an example, a flow chart of BPSK signal processing is shown in fig. 2: (a) White vector points A2, B2 in the figure are vector points of the BPSK signal in the second constellation. According to the first vector point B2 located in the first quadrant in the second constellation diagram, the phase detection preprocessing device may determine a first included angle between the first vector point B2 and the positive half axis of the I axis, and adjust the corresponding vector points A1 and B1 in the first constellation diagram according to, for example, a counterclockwise direction, to obtain a third constellation diagram, as shown in the (B) diagram. The phase demodulation preprocessing equipment adjusts the second vector point A1 positioned in the third quadrant to the first quadrant to obtain a processed first constellation diagram shown in the figure (c). It should be explained that, since the first angle between the first vector point B2 and the positive half axis of the I-axis in the second constellation is 0 degrees, the corresponding vector points A1, B1 in the first constellation are rotated by 0 degrees.

It will be appreciated that the second vector point A1 is overlaid by the vector point B1 that is originally located at that position after being adjusted to the first quadrant. Since the vector point is rotated and then overlapped with the vector point at the position, the vector point at the position is covered by the vector point, which will not be described in detail in the following embodiments of the present application.

In one possible embodiment of the present application, the phase detection preprocessing device adjusts, according to at least one first included angle and according to a first preset direction, one or more vector points corresponding to the first constellation diagram to obtain a third constellation diagram, including: the phase discrimination preprocessing equipment adjusts vector points in the negative direction of the Q axis in the first constellation diagram to obtain a fourth constellation diagram. And the phase discrimination preprocessing equipment adjusts the vector point in the first quadrant in the fourth constellation diagram according to at least one first included angle in a clockwise direction, and adjusts the vector point in the second quadrant in the fourth constellation diagram according to a counterclockwise direction, so as to obtain a third constellation diagram.

The vector points in the fourth constellation diagram are all located in the positive direction of the Q-axis, and reference may be made to the diagrams shown in fig. 4, 6 or (b) in fig. 7.

As an example, a flow chart of 8PSK signal processing is shown in fig. 4: (a) The white vector points A2-H2 corresponding to the figures are vector points of the 8PSK signal in the second constellation. The phase detection preprocessing device determines that two first vector points A2 and B2 are located on a first quadrant in the second constellation diagram, so that two first included angles between the two vector points A2 and B2 and the positive half axis of the I axis are determined. The phase detection preprocessing device adjusts vector points E1-H1 in the negative direction of the Q axis in the first constellation diagram, so as to obtain a fourth constellation diagram with vector points in the positive direction of the Q axis, as shown in the (b) diagram. Referring to the diagrams (c) to (d) shown in fig. 3, according to the determined two first included angles, the phase discrimination preprocessing equipment adjusts corresponding vector points A1 and B1 in the first quadrant in a clockwise direction, so that the included angles between the corresponding vector points A1 and B1 in the first quadrant and the positive half axis of the I axis are equal; correspondingly, vector points C1 and D1 in the second quadrant in the fourth constellation diagram are adjusted in the anticlockwise direction, so that the included angles between the corresponding vector points C1 and D1 in the third quadrant and the negative half axis of the I axis are equal, and a third constellation diagram shown in the (D) diagram is obtained. The phase demodulation preprocessing equipment adjusts the second vector points D1, C1, E1 and F1 positioned in the third quadrant to the first quadrant to obtain a processed first constellation diagram shown in the figure (E). In the processed first constellation diagram shown in the (e), all vector points are located in the same quadrant, and an included angle between the vector point and a positive half axis of the I axis is a phase difference of phase discrimination of the mixing signal.

As an example, a flow chart of 16QAM signal processing is shown in fig. 6: (a) The white vector points A2-P2 corresponding to the figures are vector points of the 16QAM signal in the second constellation diagram. Four first vector points A2, B2, G2 and H2 are determined to be located on the first quadrant in the second constellation diagram, and included angles between the two first vector points A2 and G2 and the positive half axis of the I axis are the same, so that three first included angles between the four first vector points and the positive half axis of the I axis are determined. The phase detection preprocessing device adjusts vector points I1-P1 in the negative direction of the Q axis in the first constellation diagram, so as to obtain a fourth constellation diagram with vector points in the positive direction of the Q axis, as shown in the (b) diagram. Referring to the diagrams (c) to (d) shown in fig. 3, according to the determined three first included angles, the phase discrimination preprocessing device adjusts corresponding vector points A1, B1, G1, H1, I1, J1, O1 and P1 in the first quadrant according to the clockwise direction, so that the included angles between the corresponding vector points in the first quadrant and the positive half axis of the I axis are equal; correspondingly, vector points in the second quadrant in the fourth constellation diagram are adjusted in the anticlockwise direction, so that the included angles between corresponding vector points C1-F1 and K1-N1 in the third quadrant and the negative half axis of the I axis are equal, and a third constellation diagram shown in the diagram (d) is obtained. The phase discrimination preprocessing equipment adjusts the second vector points C1-F1 and K1-N1 positioned in the third quadrant to the first quadrant to obtain a processed first constellation diagram shown in the figure (e). In the processed first constellation diagram shown in the (e), all vector points are located in the same quadrant, and an included angle between the vector point and a positive half axis of the I axis is a phase difference of phase discrimination of the mixing signal.

As an example, a flow chart of 16APSK signal processing is shown in fig. 7: (a) The white vector points A2-P1 corresponding to the figures are vector points of the 16APSK signal in the second constellation. Four first vector points A2-C2 and M2 are located on the first quadrant in the second constellation diagram, and included angles between the two first vector points B2 and M2 and the positive half axis of the I axis are the same, so that three first included angles between the four first vector points and the positive half axis of the I axis are determined. The phase detection preprocessing device adjusts vector points G1-L1, O1 and P1 in the negative direction of the Q axis in the first constellation diagram, so as to obtain a fourth constellation diagram with vector points in the positive direction of the Q axis, as shown in the (b) diagram. Referring to the diagrams (C) to (d) shown in fig. 3, according to the determined three first included angles, the phase discrimination preprocessing equipment adjusts corresponding vector points A1-C1, J1-M1 and P1 in the first quadrant in a clockwise direction, so that the included angles between the corresponding vector points in the first quadrant and the positive half axis of the I axis are equal; correspondingly, vector points D1-I1, N1 and O1 in the second quadrant in the fourth constellation diagram are adjusted in the anticlockwise direction, so that the included angles between the corresponding vector points in the third quadrant and the negative half axis of the I axis are equal, and a third constellation diagram shown in the diagram (D) is obtained. The phase discrimination preprocessing equipment adjusts the second vector points D1-I1, N1 and O1 positioned in the third quadrant to the first quadrant to obtain a processed first constellation diagram shown in the figure (e). In the processed first constellation diagram shown in the (e), all vector points are located in one quadrant, and the included angle between the vector point and the positive half axis of the I-axis is the phase difference of the phase discrimination of the mixing signal.

In one possible embodiment of the present application, the phase detection preprocessing device adjusts, according to at least one first included angle and according to a first preset direction, one or more vector points corresponding to the first constellation diagram to obtain a third constellation diagram, including: and the phase discrimination preprocessing equipment adjusts one or more vector points corresponding to the first constellation diagram according to at least one first included angle and a first preset sequence to obtain a fifth constellation diagram. And the phase discrimination pretreatment equipment adjusts a third vector point in the fifth constellation according to the second preset direction to obtain a third constellation diagram.

Wherein the vector points in the fifth constellation do not overlap each other. The second preset direction includes clockwise or counterclockwise. The distance between the third vector point and the I-axis is greater than the distance between the Q-axes.

It will be appreciated that the vector points in the fifth constellation do not overlap each other, in other words, the phase discrimination preprocessing device adjusts the vector points of any one of the first constellations so that the vector points in the fifth constellation do not overlap each other.

It will be appreciated that assuming that the coordinates of any third vector point in the fifth constellation diagram are (I, Q), the distance between this third vector point and the I-axis is |q|, the distance between this third vector point and the Q-axis is |i|, and |i| is smaller than |q|.

As an example, a flow chart of QPSK signal processing is shown in fig. 3: (a) The white vector points corresponding to the figures are vector points A2-D2 of the QPSK signal in the second constellation. A first vector point A2 is determined in the second constellation diagram at the first quadrant, and a first angle between the vector point and the positive half-axis of the I-axis is determined. From the first angle of the first vector point A2 to the positive half-axis of the I-axis, reference is made to a fifth constellation as shown in fig. 3 (b) in a, for example, counter-clockwise direction. The vector point A1 in the second quadrant and the vector point C1 in the fourth quadrant in the fifth constellation diagram are third vector points. Referring to the diagrams (C) to (d) shown in fig. 3, the phase discrimination preprocessing device adjusts the third vector points A1 and C1 in the fifth constellation diagram according to, for example, a counterclockwise direction, so as to obtain a third constellation diagram shown in the diagram (d). The phase demodulation preprocessing equipment adjusts the second vector points A1 and B1 positioned in the third quadrant to the first quadrant to obtain a processed first constellation diagram shown in the (e) diagram. In the processed first constellation diagram shown in the (e), all vector points are located in the same quadrant, and an included angle between the vector point and a positive half axis of the I axis is a phase difference of phase discrimination of the mixing signal.

As another example, a flow chart of 8QAM signal processing is shown in fig. 5: (a) The white vector points A2-H2 corresponding to the figures are vector points of the 8QAM signal in the second constellation diagram. Two first vector points A2 and H2 are determined on the positive half axis of the first quadrant and the I axis in the second constellation diagram, so that a first included angle between the two vector points and the positive half axis of the I axis is determined. From the two first angles of these two first vector points with the positive half-axis of the I-axis, a fifth constellation is obtained, for example in a counter-clockwise direction, with reference to the one shown in fig. 3 (b). It will be appreciated that, since the angle between the first vector A2 and the positive half axis of the I-axis is 0 degree, among the vector points located on the outermost circle, the 0 degree is adjusted for the corresponding outermost vector points A1-D1. Vector points B1 and H1 in the second quadrant and vector points D1 and F1 in the fourth quadrant in the fifth constellation diagram are third vector points. Referring to the diagrams (c) to (D) shown in fig. 3, the phase discrimination preprocessing device adjusts the third vector points B1, D1, F1, H1 in the fifth constellation diagram according to, for example, the anticlockwise direction, to obtain a third constellation diagram shown in the diagram (D). The phase discrimination preprocessing equipment adjusts the second vector points B1, C1, E1 and H1 positioned in the third quadrant to the first quadrant to obtain a processed first constellation diagram shown in the figure (E). In the processed first constellation diagram shown in the (e), all vector points are located in the same quadrant, and an included angle between the vector point and a positive half axis of the I axis is a phase difference of phase discrimination of the mixing signal.

In one possible embodiment of the application, the modulated signal comprises at least a phase modulated signal and a quadrature amplitude modulated signal.

Wherein the phase modulation signal at least comprises a BPSK signal, a QPSK signal, an 8PSK signal and the like; the quadrature amplitude modulation signal includes at least an 8QAM signal, a 16APSK signal, and the like.

It will be appreciated that in the case where the modulated signal is a phase modulated signal, since the mixed signal obtained by mixing the modulated signal with the local carrier signal has one amplitude value, vector points reflected by the mixed signal in the constellation diagram are located on the same circle, and the distance between these vector points and the origin is the same, referring to the diagrams (a) shown in fig. 2 to 4. Therefore, in the first constellation diagram after processing in the (e) diagram shown in fig. 2 to 4, all vector points are located in the same quadrant, and the included angle between the vector points and the positive half axis of the I axis is the same. In the case where the modulation signal is a quadrature amplitude modulation signal, since the mixed signal obtained by mixing the modulation signal with the local carrier signal has a plurality of amplitude values, vector points reflected by the mixed signal in the constellation diagram are located on a plurality of circles, the distance between the vector point located on the same circle and the origin is the same, and the distances between the vector points located on different circles and the origin are different, as shown in fig. 5 to 7 (a). Therefore, in the processed first constellation diagram shown in fig. 5 to 7 (e), vector points of different amplitude values are located on different circles, and the included angles between all vector points and the positive half axis of the I-axis are the same.

In one possible embodiment of the present application, a phase-locked loop circuit as shown in fig. 8 includes: phase discrimination preprocessing device 300.

Optionally, the phase-locked Loop circuit further includes a digitally controlled oscillator 201 (Numerically Controlled Oscillator, NCO), a first Loop Filter 202 (LF), a second Loop Filter 203, a third Loop Filter 204, and a phase detector 205 (PD).

Wherein the phase detection preprocessing device 300 is respectively connected with the first loop filter 202, the second loop filter 203 and the phase detector 205; the phase discriminator 205 is connected to the phase discriminating preprocessing device 300 and the third loop filter 204, respectively; the digitally controlled oscillator 201 is connected to a first loop filter 202 and a second loop filter 203, respectively.

As an example, the digitally controlled oscillator 201 provides two mutually orthogonal local carrier signals, which are mixed with the received modulated signals to perform down-conversion; the modulated signal after frequency mixing and down-conversion passes through a first loop filter 202 and a second loop filter 203, and low-pass filtering is carried out to obtain a frequency mixing signal of a low-frequency part; the mixed signal of the low frequency part is preprocessed by the phase discrimination preprocessing device 300, and the phase difference of the mixed signal is discriminated; then phase-discriminating is performed by the phase discriminator 205 to obtain an error signal, and the obtained error signal is sent to the third loop filter 204; the signal output by the third loop filter 204 is used to control the digitally controlled oscillator 201 to form a closed loop, and by continuously adjusting, the loop can be locked, and the frequency and phase of the local carrier wave are synchronized with the frequency and phase of the transmission carrier wave of the modulated signal, thereby realizing demodulation of the modulated signal.

It will be appreciated that each device, such as the phase-discriminating preprocessing device 300, includes corresponding structures and/or software modules for performing each function in order to achieve the functions described above. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the present application may perform the division of the functional units according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated in one processing unit. The integrated units may be implemented in hardware or in software functional units. It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice.

The method according to the embodiment of the present application is described above with reference to fig. 1 to 8, and the apparatus for performing the method according to the embodiment of the present application is described below. It will be understood by those skilled in the art that the method and the apparatus may be combined and cited, and the apparatus for phase detection preprocessing provided in the embodiment of the present application may perform the steps performed by the phase detection preprocessing device in the method for phase detection preprocessing.

In case of an integrated unit, fig. 9 shows the apparatus for phase discrimination preprocessing involved in the above embodiment, which may be a phase discrimination preprocessing device or an apparatus applied in the phase discrimination preprocessing device, such as a chip or a processing circuit, and the apparatus for phase discrimination preprocessing may include: an acquisition unit 410, a processing unit 420.

In an alternative implementation, the phase detection preprocessing device may further include a storage unit for storing program codes and data of the phase detection preprocessing device.

The phase-discriminating preprocessing means is, for example, a phase-discriminating preprocessing device or a chip applied in the phase-discriminating preprocessing device. The obtaining unit 410 is configured to obtain a first constellation of a mixed signal, where the mixed signal is a signal obtained by mixing a modulated signal with a local carrier signal, and the first constellation is configured to reflect a plurality of vector points of signal distribution of the mixed signal in IQ coordinates. The processing unit 420 is configured to process the vector points in the first constellation according to a second constellation so that an included angle between each vector point in the processed first constellation and a positive half axis of an I-axis in the first constellation is the same, where the second constellation is used for reflecting a plurality of vector points where the mixed signal is distributed in IQ coordinates when a carrier of the modulated signal is the same as a local carrier. The processing unit 420 is further configured to use an angle between any one of the vector points in the processed first constellation diagram and a positive half axis of the I-axis in the processed first constellation diagram as a phase difference of the phase discrimination of the mixing signal.

In a possible implementation manner, the processing unit 420 is further configured to determine at least one first included angle between at least one first vector point in the second constellation diagram and a positive half axis of the I-axis in the second constellation diagram, where the first vector point is located in a first quadrant of the second constellation diagram and/or the positive half axis of the I-axis, and adjust one or more vector points in the first constellation diagram according to a first preset direction according to the at least one first included angle, so that an included angle between any vector point in the first constellation diagram after processing and the positive half axis of the I-axis in the first constellation diagram after processing is the same, and the first preset direction includes a clockwise direction or a counterclockwise direction.

In a possible implementation manner, the processing unit 420 is further configured to adjust, according to at least one first included angle, one or more corresponding vector points in the first constellation diagram according to a first preset direction, so as to obtain a third constellation diagram, where the third constellation diagram includes at least two vector points, and an included angle between the two vector points in the third constellation diagram and a positive half axis of the I axis differs by pi, adjust at least one second vector point in the third constellation diagram, so as to obtain a processed first constellation diagram, and the second vector point is located in a negative direction of the I axis in the third constellation diagram.

In a possible implementation manner, the processing unit 420 is further configured to adjust a vector point in the negative Q-axis direction in the first constellation diagram to obtain a fourth constellation diagram, adjust a vector point in the first quadrant in the fourth constellation diagram according to at least one first included angle in a clockwise direction, and adjust a vector point in the second quadrant in the fourth constellation diagram according to a counterclockwise direction to obtain a third constellation diagram.

In a possible implementation manner, the processing unit 420 is further configured to adjust, according to at least one first included angle and according to a first preset sequence, one or more corresponding vector points in the first constellation diagram to obtain a fifth constellation diagram, where the vector points in the fifth constellation diagram do not overlap with each other, and adjust, according to a second preset direction, a third vector point in the fifth constellation diagram to obtain a third constellation diagram, where the second preset direction includes a clockwise direction or a counterclockwise direction, and a distance between the third vector point and an I-axis in the fifth constellation diagram is greater than a distance between the third vector point and a Q-axis in the fifth constellation diagram.

The processing unit 420 may be a processor or controller, such as a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules and circuits described in connection with this disclosure. A processor may also be a combination that performs a computational function, such as a combination comprising one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so forth. The memory module may be a memory.

With further reference to fig. 10, fig. 10 is a schematic structural diagram of a phase detection preprocessing device 300 according to an embodiment of the present application. As shown in fig. 10, the phase discrimination preprocessing apparatus 300 of this embodiment includes: at least one processor 310 (only one processor is shown in fig. 10), a memory 320, and a computer program 330, such as a data processing program, stored in the memory 320 and executable on the at least one processor 310. The steps of any of the various method embodiments described above are implemented by processor 310 when executing computer program 330. The steps of the embodiments of the various data processing methods described above are implemented when the processor 310 executes the computer program 330. The processor 310, when executing the computer program 330, performs the functions of the modules/units in the apparatus embodiments described above, such as the functions of the acquisition unit 410 and the processing unit 420 shown in fig. 9.

Alternatively, the structure of the phase-discrimination preprocessing device 300 as shown in fig. 10 may further include a memory, which may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc-only memory (compact disc read-only memory, CD-ROM) or other optical disc storage, a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, including, but not limited to, compact discs, laser discs, digital versatile discs, blu-ray discs, etc. The memory may also be integrated with the processor.

The memory is used for storing computer executing instructions for executing the scheme of the application, and the processor is used for controlling the execution. The processor is configured to execute computer-executable instructions stored in the memory, thereby implementing a method for updating a virtual wall according to the embodiments of the present application described below.

Alternatively, the computer-executable instructions in the embodiments of the present application may be referred to as application program codes, which are not particularly limited in the embodiments of the present application.

In one aspect, a computer readable storage medium is provided having instructions stored therein that, when executed, perform the functions as performed by the phase detection preprocessing device 300 in fig. 10.

In one aspect, a computer program product is provided comprising instructions that when executed perform the functions as performed by the phase detection preprocessing device 300 of fig. 10.

In one aspect, embodiments of the present application provide a chip for use in the phase-discriminating preprocessing apparatus 300, the chip including at least one processor for executing instructions to implement the functions performed by the phase-discriminating preprocessing apparatus 300 as in fig. 10.

In the above embodiments, it may be implemented in whole or in part 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 programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user device, or other programmable apparatus. The computer program or instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program or instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired or wireless means. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that integrates one or more available media. The usable medium may be a magnetic medium, e.g., floppy disk, hard disk, tape; optical media, such as digital video discs (digital video disc, DVD); but also semiconductor media such as solid state disks (solid state drive, SSD).

Although the application is described herein in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the application has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the application. It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. A method of phase discrimination preprocessing, comprising:

acquiring a first constellation diagram of a mixed signal, wherein the mixed signal is a signal obtained by mixing a modulation signal with a local carrier signal, and the first constellation diagram is used for reflecting a plurality of vector points of signal distribution of the mixed signal in an IQ coordinate;

processing vector points in the first constellation according to a second constellation so that included angles between each vector point in the processed first constellation and a positive half axis of an I axis in the first constellation are the same, wherein the second constellation is used for reflecting a plurality of vector points of signal distribution of the mixed signal in IQ coordinates under the condition that a carrier wave of the modulated signal is the same as a local carrier wave;

and taking an included angle between any vector point in the processed first constellation diagram and a positive half axis of an I axis in the processed first constellation diagram as a phase difference of phase discrimination of the mixing signal.

2. The method of claim 1, wherein processing the vector points in the first constellation according to the second constellation such that the vector points in the processed first constellation are the same as the included angle between the positive half-axes of the I-axis in the processed first constellation comprises:

Determining at least one first included angle between at least one first vector point in the second constellation diagram and a positive half-axis of an I-axis in the second constellation diagram, respectively, the first vector point being located in a first quadrant of the second constellation diagram and/or the positive half-axis of the I-axis;

and according to at least one first included angle, one or more vector points in the first constellation diagram are adjusted according to a first preset direction, so that the included angle between any vector point in the processed first constellation diagram and the positive half axis of the I axis in the processed first constellation diagram is the same, and the first preset direction comprises a clockwise direction or a anticlockwise direction.

3. The method according to claim 2, wherein adjusting the corresponding one or more vector points in the first constellation according to the first preset direction according to at least one of the first included angles so that any vector point in the processed first constellation is the same as an included angle between a positive half axis of an I-axis in the processed first constellation includes:

according to at least one first included angle, one or more corresponding vector points in the first constellation diagram are adjusted according to the first preset direction, so that a third constellation diagram is obtained, the third constellation diagram at least comprises two vector points, and the included angle between the two vector points in the third constellation diagram and the positive half axis of the I axis is different by pi;

And adjusting at least one second vector point in the third constellation diagram to obtain the processed first constellation diagram, wherein the second vector point is positioned in the negative direction of the I axis in the third constellation diagram.

4. A method according to claim 3, wherein said adjusting, according to at least one of the first angles, the corresponding one or more vector points in the first constellation according to a first preset direction to obtain a third constellation includes:

adjusting vector points in the negative direction of the Q axis in the first constellation diagram to obtain a fourth constellation diagram, wherein the vector points in the fourth constellation diagram are in the positive direction of the Q axis in the fourth constellation diagram;

and according to at least one first included angle, adjusting vector points in a first quadrant in the fourth constellation diagram in a clockwise direction, and adjusting vector points in a second quadrant in the fourth constellation diagram in a counterclockwise direction, so as to obtain the third constellation diagram.

5. A method according to claim 3, wherein said adjusting, according to at least one of the first angles, the corresponding one or more vector points in the first constellation according to a first preset direction to obtain a third constellation includes:

According to at least one first included angle, adjusting one or more corresponding vector points in the first constellation diagram according to the first preset sequence to obtain a fifth constellation diagram, wherein the vector points in the fifth constellation diagram are not overlapped with each other;

and adjusting a third vector point in the fifth constellation diagram according to a second preset direction to obtain the third constellation diagram, wherein the second preset direction comprises a clockwise direction or a counterclockwise direction, and the distance between the third vector point and an I axis in the fifth constellation diagram is larger than the distance between the third vector point and a Q axis in the fifth constellation diagram.

6. The method according to any one of claims 1 to 5, wherein the modulated signal comprises at least a phase modulated signal and a quadrature amplitude modulated signal.

7. A phase discrimination preprocessing device, characterized by comprising:

the device comprises an acquisition unit, a first constellation diagram and a second constellation diagram, wherein the acquisition unit is used for acquiring a first constellation diagram of a mixed signal, the mixed signal is a signal obtained by mixing a modulation signal with a local carrier signal, and the first constellation diagram is used for reflecting a plurality of vector points of signal distribution of the mixed signal in an IQ coordinate;

a processing unit, configured to process vector points in the first constellation according to a second constellation, so that an included angle between each vector point in the processed first constellation and a positive half axis of an I axis in the first constellation is the same, where the second constellation is used to reflect a plurality of vector points of signal distribution of the mixed signal in IQ coordinates when a carrier of the modulated signal is the same as a local carrier;

The processing unit is further configured to use an included angle between any one of the vector points in the processed first constellation diagram and a positive half axis of an I axis in the processed first constellation diagram as a phase difference of the phase discrimination of the mixing signal.

8. A phase locked loop circuit comprising a phase discrimination pre-processing device for performing the method of any one of claims 1 to 6.

9. Phase detection preprocessing device comprising a memory and a processor, said memory having stored therein a computer program, characterized in that said processor is adapted to implement the method according to any one of claims 1 to 6 when said computer program is invoked and executed.

10. A computer readable storage medium storing a computer program, which when invoked and executed by a processor, performs the method of any one of claims 1 to 6.