CN112866155B

CN112866155B - Multidimensional signal modulation mode identification method and apparatus

Info

Publication number: CN112866155B
Application number: CN202110007676.3A
Authority: CN
Inventors: 田凤; 忻向军; 谭柯; 张琦; 刘博�; 田清华; 吴曼青; 王光全; 姚海鹏; 王拥军; 王楚宣
Original assignee: Beijing University of Posts and Telecommunications
Current assignee: Beijing University of Posts and Telecommunications
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2022-04-15
Anticipated expiration: 2041-01-05
Also published as: CN112866155A

Abstract

The embodiment of the invention provides a method and a device for identifying a multi-dimensional signal modulation mode, which relate to the technical field of communication, wherein the method comprises the following steps: receiving a modulation signal; determining a two-dimensional modulation mode used when a modulation signal is obtained through modulation; aiming at each polarization direction, mapping each signal point in the modulation signal to a two-dimensional plane corresponding to the polarization direction, comparing the signal point with constellation points in a two-dimensional constellation diagram corresponding to the determined two-dimensional modulation mode, and determining a constellation point subset to which the constellation point with the closest distance in the two-dimensional constellation diagram belongs as the constellation point subset corresponding to the signal point in the polarization direction; and identifying a multidimensional modulation mode used when the modulation signal is obtained through modulation according to the distribution rule of the constellation point subsets corresponding to the signal points in the polarization directions. By applying the scheme provided by the embodiment of the invention to identify the multi-dimensional signal modulation mode, the identification of the multi-dimensional modulation mode used when the modulation signal is obtained through modulation can be realized.

Description

Multidimensional signal modulation mode identification method and apparatus

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for identifying a multi-dimensional signal modulation scheme.

Background

In order to realize transmission of an original signal from a signal transmitting end to a signal receiving end, the signal transmitting end performs signal modulation on the signal before transmitting the original signal to obtain a modulated signal, and transmits the modulated signal to the signal receiving end. After receiving the modulated signal, the signal receiving end may perform signal demodulation on the modulated signal, thereby obtaining an original signal. The above-mentioned signal modulation and signal demodulation processes are opposite processes corresponding to each other.

With the development of communication technology, a communication process tends to a mixed form of multiple modulation modes, for example, a signal sending end may monitor a channel environment of a channel through a signal monitoring technology, such as a noise level of the channel, and select a modulation mode matched with the channel environment according to the current channel environment to modulate a signal, and then send the signal to a signal receiving end, and the communication process has certain flexibility. Signal monitoring techniques play a crucial role in the management and optimization of communication networks. However, since the modulation method used by the signal transmitting end for signal modulation may change, the signal receiving end does not determine the signal modulation method used by the signal transmitting end for signal transmission, and it is difficult to demodulate the received signal to obtain the original signal.

In addition, the signal receiving end may also receive other signals that do not determine the modulation scheme. Therefore, the signal receiving end needs to identify the modulation scheme used when generating the modulation signal, so as to demodulate the modulation signal by using the corresponding demodulation scheme.

Further, the multi-dimensional modulation scheme is a signal modulation scheme that performs two-dimensional modulation in a plurality of polarization directions, and is more complicated than the two-dimensional modulation scheme. In the prior art, the multidimensional modulation mode used when the modulation signal is obtained is difficult to identify.

Disclosure of Invention

An object of the embodiments of the present invention is to provide a method and an apparatus for identifying a modulation scheme of a multi-dimensional signal, so as to identify the multi-dimensional modulation scheme used when the modulation signal is obtained through modulation. The specific technical scheme is as follows:

in a first aspect, an embodiment of the present invention provides a method for identifying a multi-dimensional signal modulation scheme, where the method includes:

receiving a modulation signal;

determining a two-dimensional modulation mode used when the modulation signal is obtained through modulation;

for each polarization direction, mapping each signal point in the modulation signal to a two-dimensional plane corresponding to the polarization direction, comparing with a constellation point in a two-dimensional constellation diagram corresponding to the determined two-dimensional modulation mode, determining a constellation point subset to which a constellation point with the mapping point of each signal point closest to the two-dimensional constellation diagram belongs, as a constellation point subset corresponding to the signal point in the polarization direction, wherein the constellation point subset is: a subset is obtained by dividing the constellation points in the corresponding two-dimensional constellation diagram in a preset dividing mode;

and identifying a multidimensional modulation mode used when the modulation signal is obtained through modulation according to the distribution rule of the constellation point subsets corresponding to the signal points in the polarization directions.

In an embodiment of the present invention, the identifying, according to a distribution rule of constellation point subsets corresponding to each signal point in each polarization direction, a multidimensional modulation scheme used when the modulation signal is obtained through modulation includes:

obtaining a representation value for representing the distribution rule of the constellation point subsets corresponding to the signal points according to the distribution rule of the constellation point subsets corresponding to the signal points in each polarization direction;

and identifying the multidimensional modulation mode used when the modulation signal is obtained through modulation from the multidimensional diversity SP modulation mode, the multidimensional subset selection SSM modulation mode and the multidimensional grid coding TCM modulation mode according to the numerical relation between the characteristic value and the total characteristic value.

In an embodiment of the present invention, the obtaining the representation value for representing the distribution rule of the constellation point subset corresponding to each signal point according to the distribution rule of the constellation point subset corresponding to each signal point in each polarization direction includes:

and determining a first number of first signal points with the same constellation point subset in each polarization direction as the characterization value.

In an embodiment of the present invention, the total characterization value is a logarithm of adjacent signal points, where the adjacent signal points are two adjacent signal points in the modulation signal, and the obtaining a characterization value for characterizing a distribution rule of a constellation point subset corresponding to each signal point according to a distribution rule of the constellation point subset corresponding to each signal point in each polarization direction includes:

determining a second number of neighboring signal points for which the corresponding subset of constellation points in each polarization direction is identical to each other as the characterizing value.

In one embodiment of the present invention, the total characterization value is: a total number of categories of a multi-dimensional subset sequence corresponding to the signal point, the multi-dimensional subset sequence comprising: a multi-dimensional subset corresponding to each signal point included in the subset of signal points, the multi-dimensional subset being used to represent: the distribution rule of the constellation point subsets corresponding to the signal points in each polarization direction;

the obtaining a representation value for representing the distribution rule of the constellation point subset corresponding to each signal point according to the distribution rule of the constellation point subset corresponding to each signal point in each polarization direction includes:

determining a multidimensional subset corresponding to each signal point according to the distribution rule of the constellation point subsets corresponding to each signal point in each polarization direction to obtain a multidimensional subset sequence corresponding to the signal point subsets;

and counting the number of each multi-dimensional subset sequence, and determining the number of the types of the multi-dimensional subset sequences with the number larger than a second preset number as the characterization value.

In an embodiment of the present invention, the determining a two-dimensional modulation scheme used when the modulation signal is obtained through modulation includes:

mapping the signal points in the modulation signal into a Stokes space, and determining the space mapping points of the signal points in the Stokes space;

clustering each space mapping point to obtain a clustering result;

calculating a high-order accumulation amount aiming at a clustering center point in the obtained clustering result to obtain a calculation result;

and determining a two-dimensional modulation mode used when the modulation signal is obtained through modulation according to the calculation result.

In a second aspect, an embodiment of the present invention provides an apparatus for identifying a modulation scheme of a multi-dimensional signal, where the apparatus includes:

the signal receiving module is used for receiving the modulation signal;

a modulation mode determining module, configured to determine a two-dimensional modulation mode used when the modulation signal is obtained through modulation;

an interval determining module, configured to map, for each polarization direction, each signal point in the modulation signal to a two-dimensional plane corresponding to the polarization direction, compare the signal point with a constellation point in a two-dimensional constellation diagram corresponding to the determined two-dimensional modulation manner, determine a constellation point subset to which a constellation point closest to the mapping point of each signal point in the two-dimensional constellation diagram belongs, and use the constellation point subset as a constellation point subset corresponding to the signal point in the polarization direction, where the constellation point subset is: a subset is obtained by dividing the constellation points in the corresponding two-dimensional constellation diagram in a preset dividing mode;

and the modulation mode identification module is used for identifying a multidimensional modulation mode used when the modulation signal is obtained through modulation according to the distribution rule of the constellation point subsets corresponding to the signal points in the polarization directions.

In an embodiment of the present invention, the modulation scheme identifying module includes:

the characteristic value obtaining submodule is used for obtaining a characteristic value used for characterizing the distribution rule of the constellation point subsets corresponding to the signal points according to the distribution rule of the constellation point subsets corresponding to the signal points in each polarization direction;

and the modulation mode identification submodule is used for identifying the multi-dimensional modulation mode used when the modulation signal is obtained through modulation from a multi-dimensional diversity SP modulation mode, a multi-dimensional subset selection SSM modulation mode and a multi-dimensional grid coding TCM modulation mode according to the numerical relation between the representation value and the total representation value.

In an embodiment of the present invention, the total token value is a total number of signal points, and the token value obtaining submodule is specifically configured to:

In an embodiment of the present invention, the total token value is a logarithm of adjacent signal points, where the adjacent signal points are two adjacent signal points in the modulation signal, and the token value obtaining submodule is specifically configured to:

the characterization value obtaining submodule is specifically configured to:

In an embodiment of the present invention, the modulation scheme determining module is specifically configured to:

clustering each space mapping point to obtain a clustering result;

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 multi-dimensional signal modulation mode identification scheme provided by the embodiment of the invention, the two-dimensional modulation mode used when the modulation signal is obtained through modulation is determined, so that the two-dimensional constellation diagram corresponding to the two-dimensional modulation mode and the constellation point subset to which the constellation point in the two-dimensional constellation diagram belongs are determined. And aiming at each polarization direction, mapping the signal points in the modulation signals to a two-dimensional plane corresponding to the polarization direction, and comparing the signal points with the constellation points in the two-dimensional constellation diagram corresponding to the determined two-dimensional modulation mode, thereby determining the constellation point subset corresponding to each signal point. And identifying a multidimensional modulation mode used when the modulation signal is obtained through modulation according to the corresponding constellation points of the signal points in different polarization directions.

As can be seen from the above, because the multidimensional modulation modes used in generating the modulation signal are different, the positions of the mapping points obtained by mapping the signal points in the modulation signal onto the two-dimensional constellation map are different in each polarization direction, and the distribution rules of the constellation point subsets corresponding to the signal points are different. Therefore, according to the distribution rule that the distribution conditions of the constellation point subsets corresponding to the signal points in different polarization directions conform to, the multidimensional modulation mode used when the modulation signal is obtained through modulation can be identified.

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. 1 is a schematic flowchart of a first method for identifying a modulation mode of a multi-dimensional signal according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a first two-dimensional constellation diagram provided in an embodiment of the present invention;

fig. 3 is a schematic diagram of a second two-dimensional constellation diagram provided in an embodiment of the present invention;

FIG. 4 is a diagram illustrating a first mapping interval according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating a second mapping interval provided in an embodiment of the invention;

fig. 6 is a schematic flowchart of a second method for identifying a modulation mode of a multi-dimensional signal according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a constellation point subset value provided in an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a first multi-dimensional signal modulation scheme identification apparatus according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a second multi-dimensional signal modulation scheme identification apparatus according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of an electronic device provided in 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.

In order to identify a multi-dimensional modulation mode used when the modulation signal is obtained through modulation, the embodiment of the invention provides a multi-dimensional signal modulation mode identification method and a multi-dimensional signal modulation mode identification device.

In an embodiment of the present invention, a method for identifying a modulation scheme of a multi-dimensional signal is provided, where the method includes:

a modulated signal is received.

And determining a two-dimensional modulation mode used when the modulation signal is obtained through modulation.

For each polarization direction, mapping each signal point in the modulation signal to a two-dimensional plane corresponding to the polarization direction, comparing with a constellation point in a two-dimensional constellation diagram corresponding to the determined two-dimensional modulation mode, determining a constellation point subset to which a constellation point with the mapping point of each signal point closest to the two-dimensional constellation diagram belongs, as a constellation point subset corresponding to the signal point in the polarization direction, wherein the constellation point subset is: and the constellation points in the corresponding two-dimensional constellation map are divided into subsets by adopting a preset division mode.

The following describes a method and an apparatus for identifying a multi-dimensional signal modulation scheme according to an embodiment of the present invention with reference to specific embodiments.

Referring to fig. 1, an embodiment of the present invention provides a flowchart of a first method for identifying a modulation mode of a multi-dimensional signal, and the method may be implemented through the following steps S101 to S104.

S101: a modulated signal is received.

Specifically, the modulation signal may be an optical signal received through an optical fiber.

S102: and determining a two-dimensional modulation mode used when the modulation signal is obtained through modulation.

Specifically, the modulated signal may be subjected to digital signal processing to obtain an equalized signal, and then the equalized signal may be subjected to two-dimensional modulation mode identification.

In addition, the modulation signal may be demultiplexed to obtain a demultiplexed signal, and then the demultiplexed signal may be subjected to two-dimensional modulation mode identification.

If the modulation signal is a modulation signal modulated by a multidimensional modulation method, the two-dimensional modulation methods used in the respective polarization directions of the multidimensional modulation are the same.

For example, the two-dimensional Modulation scheme may be 16QAM (Quadrature Amplitude Modulation), 8PSK (phase-shift keying), or the like.

In the embodiment of the present invention, the above step S102 may be implemented by the following steps a to D.

Step A: and mapping the signal points in the modulation signal into a Stokes space, and determining the space mapping points of the signal points in the Stokes space.

And B: and clustering the mapping points in each space to obtain a clustering result.

Specifically, algorithms in the prior art, such as a subtractive clustering algorithm, a K-Means clustering algorithm, a mean shift clustering algorithm, and the like, may be used to cluster the mapping points in each space, which is not limited in the embodiments of the present invention.

And C: and calculating the high-order accumulation amount aiming at the cluster center point in the obtained clustering result to obtain a calculation result.

Step D: and determining a two-dimensional modulation mode used when the modulation signal is obtained through modulation according to the calculation result.

Specifically, the two-dimensional modulation format used for the multi-dimensional signal may be determined by comparing the signal characteristic of the modulated signal obtained as the calculation result with the signal characteristic of a sample signal of a two-dimensional modulation scheme used when the signal is obtained by known modulation.

The calculation result can be included in a pre-trained two-dimensional modulation mode identification model, so as to determine the two-dimensional modulation mode used when the modulation signal is obtained through modulation.

In the step a, the signal points in the modulation signal are mapped to the Stokes space, so that the steps a to D may be referred to as a modulation identification mode based on the Stokes space.

In addition, the two-dimensional modulation scheme used when the modulation signal is obtained by modulation may be determined by a recognition scheme based on information entropy, a recognition scheme based on a direct current component, and the like in the related art, which is not limited in the embodiment of the present invention.

S103: and for each polarization direction, mapping each signal point in the modulation signal to a two-dimensional plane corresponding to the polarization direction, comparing the signal point with a constellation point in a two-dimensional constellation diagram corresponding to the determined two-dimensional modulation mode, and determining a constellation point subset to which a constellation point with the closest distance to the mapping point of each signal point in the two-dimensional constellation diagram belongs as a constellation point subset corresponding to the signal point in the polarization direction.

Wherein, the constellation point subset is: and the constellation points in the corresponding two-dimensional constellation map are divided into subsets by adopting a preset division mode.

Specifically, the number of the polarization directions corresponding to the commonly used multidimensional modulation method is 2, and the two-dimensional constellation diagram is also located in a two-dimensional plane corresponding to each polarization direction.

In an embodiment of the present invention, a preset number of signal points may be randomly selected and mapped onto the two-dimensional constellation corresponding to the polarization direction, and a constellation point subset corresponding to the selected signal point is determined. For example, the number of the preset signal points may be 5000, 7000, and the like. The selected signal points represent all signal points in the modulation signal, and on the basis of meeting the identification requirement of the multi-dimensional signal modulation mode, the number of the signal points which need to be processed when the multi-dimensional modulation mode used for obtaining the modulation signal is identified and modulated can be reduced, so that the calculation resources are saved.

Specifically, the determined two-dimensional modulation modes are different, the two-dimensional constellation maps are different, and each two-dimensional modulation mode corresponds to one two-dimensional constellation map.

Fig. 2 is a schematic diagram of a first two-dimensional constellation diagram provided in the embodiment of the present invention.

The figure shows a two-dimensional constellation diagram corresponding to a 16QAM modulation mode, wherein each point in the diagram is a constellation point in the two-dimensional constellation diagram, an x axis in the diagram corresponds to a real part of the constellation point, and a y axis in the diagram corresponds to an imaginary part of the constellation point.

Fig. 3 is a schematic diagram of a second two-dimensional constellation diagram provided in the embodiment of the present invention.

The figure shows a two-dimensional constellation diagram corresponding to an 8PSK modulation mode, and like the embodiment shown in fig. 2, each point in the diagram is a constellation point in the two-dimensional constellation diagram, and an x axis in the diagram corresponds to a real part of the constellation point, and a y axis in the diagram corresponds to an imaginary part of the constellation point.

The constellation point subsets in different two-dimensional constellation diagrams are divided in different modes, and each two-dimensional constellation diagram corresponds to one of the constellation point subsets. However, the constellation point subsets in different two-dimensional constellation diagrams all satisfy the same partition rule, that is, for one two-dimensional constellation diagram, the partition rule that the minimum euclidean distance between constellation points in the same constellation point subset is the largest is satisfied.

In an embodiment of the present invention, a mapping interval in which a signal point is mapped to a mapping point on a two-dimensional constellation map may be determined, so as to determine a constellation point subset corresponding to the signal point. The mapping interval is as follows: and each mapping interval comprises a constellation point, and the distance between any point in the mapping interval and the constellation point contained in the mapping interval is less than the distance between any point in the mapping interval and other constellation points.

Therefore, the mapping interval where the mapping point of the signal point is located is determined, so that the constellation point closest to the mapping point of the signal point can be determined, and the constellation point subset corresponding to the determined constellation point is determined as the constellation point subset corresponding to the signal point.

Fig. 4 is a schematic diagram of a first mapping interval according to an embodiment of the present invention.

The mapping intervals in the two-dimensional constellation diagram corresponding to the 16QAM modulation scheme are shown in the figure, and correspond to the constellation diagram shown in fig. 2, where a gray portion constitutes one mapping interval, a black portion constitutes another mapping interval, and constellation points included in the same mapping interval belong to the same constellation point subset.

Fig. 5 is a schematic diagram of a second mapping interval according to an embodiment of the present invention.

The figure shows mapping intervals in a two-dimensional constellation diagram corresponding to an 8PSK adjustment mode, which correspond to the constellation diagram shown in fig. 3, where a gray portion constitutes one mapping interval, a black portion constitutes another mapping interval, and constellation points included in the same mapping interval belong to the same constellation point subset.

In an embodiment of the present invention, a preset subset sequence number may be set for each constellation point subset, and the constellation point subset corresponding to each signal point is recorded in a sequence number string including the subset sequence number, where the subset sequence number may be represented in a form of a number, a character, or the like.

For example, the subset number of the constellation point subset a may be set to 0, and the subset number of the constellation point subset B may be set to 1, so that if the constellation point subsets corresponding to the signal point a in different polarization directions are a and B, respectively, the sequence number character string corresponding to the signal point a may be recorded as {0,1 }.

S104: and identifying a multidimensional modulation mode used when the modulation signal is obtained through modulation according to the distribution rule of the constellation point subsets corresponding to the signal points in the polarization directions.

Specifically, the multidimensional modulation modes used when the modulation signal is obtained through modulation are different, and the distribution rules of the constellation point subsets corresponding to each signal point in each polarization direction are different.

For example, if the multidimensional modulation scheme is a Set-Partitioning (SP) modulation scheme, the constellation point subsets corresponding to different polarization directions for each signal point in the modulated signal obtained by modulation are the same.

Therefore, according to the distribution rule of the constellation point subsets corresponding to each signal point in each polarization direction, the multidimensional modulation mode used when the modulation signal is obtained through modulation can be identified.

In one embodiment of the present invention, the step S104 can be realized through the steps S104A-S104B, which will not be described in detail herein.

Referring to fig. 6, a flowchart of a second method for identifying a modulation mode of a multi-dimensional signal according to an embodiment of the present invention is shown, and compared with the embodiment shown in fig. 1, the foregoing step S104 can be implemented by the following steps S104A-S104B.

S104A: and obtaining a representation value for representing the distribution rule of the constellation point subsets corresponding to the signal points according to the distribution rule of the constellation point subsets corresponding to the signal points in each polarization direction.

Specifically, the distribution rules of the constellation point subsets corresponding to the signal points are different due to different multidimensional modulation modes, and the characteristic values capable of representing the distribution rules are different, so that the expected identified multidimensional modulation modes are different, and the characteristic values to be obtained are different.

In the embodiment of the present invention, the above-mentioned characterization value can be obtained through step E, step F or steps G to H, which will not be described in detail herein.

S104B: and identifying the multidimensional modulation mode used when the modulation signal is obtained through modulation from the multidimensional diversity SP modulation mode, the multidimensional subset selection SSM modulation mode and the multidimensional grid coding TCM modulation mode according to the numerical relation between the characteristic value and the total characteristic value.

For different multidimensional modulation modes, the total eigenvalue is different, the mode of identifying the multidimensional modulation mode is different according to the numerical relationship between the eigenvalue and the total eigenvalue, and the description is given after the description of the step E, the step F, and the steps G to H, which is not detailed herein.

As can be seen from the above, because the multidimensional modulation methods used when the modulation signal is obtained through modulation are different, and the distribution rules of the constellation point subsets corresponding to each signal point in the modulation signal are different, the multidimensional modulation method used when the modulation signal is obtained through modulation can be identified based on the characterization values that characterize the distribution rules of the constellation point subsets corresponding to each signal point.

In an embodiment of the present invention, for the SP modulation mode, the above-mentioned characteristic value can be obtained through the following step E.

Step E: and determining a first number of first signal points with the same constellation point subset in each polarization direction as the characteristic value.

Specifically, since the constellation point subsets corresponding to different polarization directions of each signal point in the modulated signal obtained by modulation based on the SP modulation method are the same, if it is desired to identify whether the multi-dimensional modulation method is the SP modulation method, it is necessary to determine a first number of first signal points having the same constellation point subset corresponding to each polarization direction, as the characteristic value, to determine whether the multi-dimensional modulation method used when the modulated signal is obtained is the SP modulation method.

In the case where the constellation point subsets corresponding to the respective signal points are recorded in the form of sequence number strings including subset sequence numbers, the number of signal points having the same subset sequence number included in the sequence number string may be determined as the first number.

In addition, for SSM (Subset Switch Modulation), the above-described characteristic value can be obtained by the following step F.

Step F: a second number of adjacent signal points for which the corresponding subset of constellation points in each polarization direction is identical to each other is determined as the characterizing value.

The adjacent signal points are two adjacent signal points in the modulation signal.

Specifically, since the constellation point subsets corresponding to each polarization direction of adjacent signal points in the modulated signal obtained by modulation based on the SSM modulation scheme are identical to each other, if it is desired to identify whether the multi-dimensional modulation scheme is the SSM modulation scheme, it is necessary to determine a second number of adjacent signal points, which are identical to each other, of the constellation point subsets corresponding to each polarization direction, as the characteristic value, to determine whether the multi-dimensional modulation scheme used when the modulated signal is obtained by modulation is the SSM modulation scheme.

In the case where the constellation point subsets corresponding to the respective signal points are recorded in the form of sequence number character strings including subset sequence numbers, the number of adjacent signal points having the same sequence number character string may be determined as the second number.

In addition, the characteristic value can be obtained through the following steps G to H for a TCM (Trellis Code Modulation) Modulation scheme.

Step G: and determining the multidimensional subsets corresponding to each signal point according to the distribution rule of the constellation point subsets corresponding to each signal point in each polarization direction to obtain multidimensional subset sequences corresponding to the signal point subsets.

Wherein the subset of signal points is: the signal points in the modulation signal are divided into a set containing a first preset number of signal points.

Specifically, according to a state transition diagram of a convolutional encoder used for TCM modulation, the first preset number may be 3, and the signal points in the signal point subset are sequentially adjacent to each other.

In addition, the multidimensional subset sequence includes: a multi-dimensional subset of signal points corresponding to the signal points contained in the subset of signal points. The above multidimensional subset is used to represent: and the distribution rule of the constellation point subsets corresponding to the signal points in each polarization direction.

The multidimensional subsets corresponding to the signal points may be represented in the form of serial number strings, and the multidimensional subset sequence may be a set of serial number strings.

The multidimensional subsets may be expressed in the form of multidimensional numbers, where there is a preset corresponding relationship between the multidimensional numbers and the distribution of the constellation point subsets corresponding to the signal points in each polarization direction, and each multidimensional number corresponds to one distribution. The multi-dimensional serial number may be expressed in the form of numbers, characters, and the like.

For example, if a signal point corresponds to the constellation point subset a in one polarization direction and corresponds to the constellation point subset B in the other polarization direction, the value of the multidimensional sequence number is 1; if the signal point corresponds to the constellation point subset a in one polarization direction and corresponds to the constellation point subset a in the other polarization direction, the value of the multidimensional sequence number is 2, and the like.

Step H: and counting the number of each multi-dimensional subset sequence, and determining the number of the types of the multi-dimensional subset sequences with the number larger than a second preset number as the characterization value.

Because the values of the constellation point subsets corresponding to adjacent signal points in different polarization directions in the modulation signal obtained based on the TCM modulation mode have a certain rule and are not completely random, because the TCM uses convolutional coding to encode the subset selection bits, and the state transition path corresponding to the convolutional coder is known, the type of the multidimensional subset sequence has a certain limitation, and the number of the types of the multidimensional subset sequence can be used as the characteristic value to determine whether the multidimensional modulation mode used when the modulation signal is obtained through modulation is the TCM modulation mode.

Referring to fig. 7, an embodiment of the present invention provides a diagram of values of a multidimensional subset.

Where s1-s4 respectively indicate states of convolutional encoders used for TCM modulation, 00, 10, 01, and 11 respectively indicate values of convolutional encoder register states, and a connecting line in the figure indicates that the values of the states of the convolutional encoders can be shifted from the left side of the connecting line to the right side of the connecting line without being disturbed by noise or the like. The state transition of the convolutional encoder affects the values of the multidimensional subsets corresponding to the signal points obtained by modulation, and the thick solid line, the thin solid line, the thick dotted line and the thin dotted line in the figure represent different state transition paths and respectively correspond to the values of different multidimensional subsets. For example, the value of the multidimensional subset corresponding to the thick solid line is 1, the value of the multidimensional subset corresponding to the thin solid line is 2, the value of the multidimensional subset corresponding to the thick dotted line is 3, and the value of the multidimensional subset corresponding to the thin dotted line is 4.

As can be seen from the figure, three state transitions exist between s1 and s4, and the values of the corresponding output 3 multidimensional subsets, that is, the possible number of the categories of the multidimensional subset sequence is 32: (111) (114), (143), (142), (134), (131), (122), (123), (241), (244), (213), (212), (221), (224), (232), (233), (341), (344), (313), (312), (324), (321), (332), (333), (434), (431), (422), (423), (411), (414), (443), (442). And in the case of using no TCM modulation, the total number of categories of the multidimensional subset sequence should be 4³64 kinds of

The arrangement rule shown in fig. 7 is only a case corresponding to a convolutional encoder, and this is not limited in the embodiment of the present invention.

Specifically, because the modulation signal is affected by noise during transmission, a signal value of a signal point in the received modulation signal may change, a constellation point closest to a mapping point of the signal point in a two-dimensional constellation may change, which may cause a constellation point subset corresponding to the signal point to change, and a multi-dimensional subset sequence corresponding to the signal point subset may change. Since the above variation is random, the multi-dimensional subset sequence with small probability may be caused by noise, and is not representative. Only the number of kinds of the representative multi-dimensional subset sequences larger than the second preset number may be counted as the above-mentioned characterization value.

For example, the second predetermined number may be 5, 10, etc.

In an embodiment of the present invention, when it is identified whether the multidimensional modulation scheme used when the modulation signal is obtained through modulation is an SP modulation scheme, the characterization value is a first number of first signal points having the same constellation point subset in each polarization direction, and the total characterization value may be a total number of the signal points.

If the multidimensional modulation mode used when the modulation signal is obtained through modulation is an SP modulation mode, the constellation point subsets corresponding to most signal points in each polarization direction should be the same, the characterization value should be close to a total characterization value, and an absolute value of a ratio or a difference between the characterization value and the total characterization value may be calculated to represent a numerical relationship between the characterization value and the total characterization value.

For example, a ratio between the characteristic value and the total characteristic value may be calculated, and if the ratio is greater than a first preset ratio, the multidimensional modulation method used when the modulation signal is obtained through modulation is identified as an SP modulation method, and the first preset ratio may be 0.8, 0.85, and the like.

In another embodiment of the present invention, in the case of identifying whether the multidimensional modulation scheme used when the modulation signal is obtained by modulation is the SSM modulation scheme, the characterization value is a second number of adjacent signal points whose constellation point subsets corresponding to each polarization direction are identical to each other. The total token value may be the logarithm of the adjacent signal points. The adjacent signal points are two adjacent signal points in the modulation signal.

Since there is no other signal point located at and adjacent to the rear end of the last signal point for the other signal points, and there is another signal point located at and adjacent to the rear end of the last signal point for the other signal points, the logarithm of the adjacent signal points included in the modulation signal is the total number of signal points minus 1.

If the multidimensional modulation method used when the modulation signal is obtained by modulation is an SSM modulation method, the constellation point subsets corresponding to most adjacent signal points in each polarization direction should be the same as each other, the characterization value should be close to the total characterization value, and the absolute value of the ratio or difference between the characterization value and the total characterization value may be calculated to represent the numerical relationship between the characterization value and the total characterization value.

For example, a ratio between the characteristic value and the total characteristic value may be calculated, and if the ratio is greater than a second preset ratio, the multidimensional modulation mode used when the modulation signal is obtained through modulation is identified as an SSM modulation mode, and the second preset ratio may be 0.5, 0.6, and the like.

In another embodiment of the present invention, when identifying whether the multidimensional modulation scheme used when the modulation signal is obtained by modulation is a TCM modulation scheme, the characterization value is a number of categories of multidimensional subset sequences, the number of categories being greater than a second preset number, and the total characterization value may be: and the signal point corresponds to the total number of the types of the multidimensional subset sequence. The multidimensional subset sequence comprises: and a multi-dimensional subset corresponding to each signal point contained in the signal point subset. The above multidimensional subset is used to represent: and the distribution rule of the constellation point subsets corresponding to the signal points in each polarization direction.

If the multidimensional modulation mode used when the modulation signal is obtained by modulation is a TCM modulation mode, values of the multidimensional subsets affect each other, each multidimensional subset cannot be randomly selected, and a multidimensional subset sequence of a part of types corresponding to the total number of types should not appear in the modulation signal. The token should not be close to the total token, and the absolute value of the ratio or difference between the token and the total token may be calculated to represent the numerical relationship between the token and the total token.

For example, when the signal point subset includes 3 signal points and the multidimensional signal modulation scheme is a four-dimensional signal modulation scheme, two different values exist in the constellation point subset corresponding to each signal point in one polarization direction, so that 4 different values exist in the multidimensional subsets corresponding to each signal point in two polarization directions, and the total characterization value is 4³＝64。

A ratio between the characteristic value and the total characteristic value may be calculated, and if the ratio is smaller than a third preset ratio, the multidimensional modulation mode used when the modulation signal is obtained through modulation is identified as a TCM modulation mode, and the third preset ratio may be 0.5, 0.6, and the like.

Corresponding to the foregoing multi-dimensional signal modulation mode identification method, referring to fig. 8, an embodiment of the present invention further provides a schematic structural diagram of a first multi-dimensional signal modulation mode identification apparatus, where the apparatus includes:

a signal receiving module 801, configured to receive a modulated signal;

a modulation mode determining module 802, configured to determine a two-dimensional modulation mode used when the modulation signal is obtained through modulation;

an interval determining module 803, configured to map, for each polarization direction, each signal point in the modulation signal to a two-dimensional plane corresponding to the polarization direction, compare the signal point with a constellation point in a two-dimensional constellation diagram corresponding to the determined two-dimensional modulation manner, and determine a constellation point subset to which a constellation point closest to the mapping point of each signal point in the two-dimensional constellation diagram belongs, as a constellation point subset corresponding to the signal point in the polarization direction, where the constellation point subset is: a subset is obtained by dividing the constellation points in the corresponding two-dimensional constellation diagram in a preset dividing mode;

a modulation mode identification module 804, configured to identify, according to a distribution rule of a constellation point subset corresponding to each signal point in each polarization direction, a multidimensional modulation mode used when the modulation signal is obtained through modulation.

Referring to fig. 9, a schematic structural diagram of a second multi-dimensional signal modulation scheme identifying apparatus according to an embodiment of the present invention is shown, and compared with the embodiment shown in fig. 8, the modulation scheme identifying module 804 includes:

the characteristic value obtaining submodule 804A is configured to obtain a characteristic value for characterizing a distribution rule of a constellation point subset corresponding to each signal point according to the distribution rule of the constellation point subset corresponding to each signal point in each polarization direction;

and the modulation mode identification submodule 804B is configured to identify a multi-dimensional modulation mode used when the modulation signal is obtained by modulation, from among a multi-dimensional diversity SP modulation mode, a multi-dimensional subset selection SSM modulation mode, and a multi-dimensional trellis coded TCM modulation mode, according to a numerical relationship between the characteristic value and the total characteristic value.

In an embodiment of the present invention, the total token value is a total number of signal points, and the token value obtaining sub-module 804A is specifically configured to:

As can be seen from the above description, since the constellation point subsets corresponding to different polarization directions of each signal point in the modulated signal obtained by the SP modulation method are the same, if it is desired to identify whether the multi-dimensional modulation method is the SP modulation method, it is necessary to determine a first number of first signal points having the same constellation point subsets corresponding to the respective polarization directions, as the characteristic value, to determine whether the multi-dimensional modulation method used when the modulated signal is obtained is the SP modulation method.

In an embodiment of the present invention, the total token value is a logarithm of adjacent signal points, where the adjacent signal points are two adjacent signal points in the modulation signal, and the token value obtaining sub-module 804A is specifically configured to:

As can be seen from the above description, since the constellation point subsets corresponding to each polarization direction of adjacent signal points in the modulated signal obtained by the SSM modulation method are identical to each other, if it is desired to identify whether the multi-dimensional modulation method is the SSM modulation method, it is necessary to determine a second number of adjacent signal points corresponding to each polarization direction, where the constellation point subsets are identical to each other, as the characteristic value to determine whether the multi-dimensional modulation method used when the modulated signal is obtained is the SSM modulation method.

the above-mentioned token value obtaining sub-module 804A is specifically configured to:

As can be seen from the above, in a modulated signal obtained based on a TCM modulation method, values of constellation point subsets corresponding to adjacent signal points in different polarization directions have a certain rule and are not completely random, since the TCM uses convolutional coding to encode subset selection bits, a state transition path corresponding to a convolutional encoder is known, the type of the multidimensional subset sequence has a certain limitation, and the type number of the multidimensional subset sequence can be used as the characteristic value to determine whether the multidimensional modulation method used when the modulated signal is obtained is the TCM modulation method.

In an embodiment of the present invention, the modulation scheme determining module 802 is specifically configured to:

clustering each space mapping point to obtain a clustering result;

The embodiment of the present invention further provides an electronic device, as shown in fig. 10, which includes a processor 1001, a communication interface 1002, a memory 1003 and a communication bus 1004, wherein the processor 1001, the communication interface 1002 and the memory 1003 complete mutual communication through the communication bus 1004,

a memory 1003 for storing a computer program;

the processor 1001 is configured to implement the method and apparatus for identifying the modulation scheme of the multi-dimensional signal when executing the program stored in the memory 1003.

When the electronic device provided by the embodiment of the invention is applied to identify the signal modulation mode, due to the fact that the multi-dimensional modulation modes used in the generation of the modulation signal are different, the positions of mapping points obtained by mapping signal points in the modulation signal to a two-dimensional constellation diagram are different in each polarization direction, and the distribution rules of constellation point subsets corresponding to the signal points are different. Therefore, according to the distribution rule that the distribution conditions of the constellation point subsets corresponding to the signal points in different polarization directions conform to, the multidimensional modulation mode used when the modulation signal is obtained through modulation can be identified.

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 also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components.

In 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, when executed by a processor, implements the steps of any one of the above-mentioned methods for identifying a modulation scheme of a multi-dimensional signal.

When the computer program stored in the computer-readable storage medium provided in this embodiment is applied to identify a signal modulation mode, because multidimensional modulation modes used in generating a modulation signal are different, positions of mapping points obtained by mapping signal points in the modulation signal onto a two-dimensional constellation map are different in each polarization direction, and distribution rules of constellation point subsets corresponding to the signal points are different. Therefore, according to the distribution rule that the distribution conditions of the constellation point subsets corresponding to the signal points in different polarization directions conform to, the multidimensional modulation mode used when the modulation signal is obtained through modulation can be identified.

In another embodiment of the present invention, there is also provided a computer program product containing instructions, which when run on a computer, causes the computer to perform the steps of any one of the above-mentioned multi-dimensional signal modulation scheme identification methods.

When the computer program product provided by this embodiment is executed to identify a signal modulation mode, because multidimensional modulation modes used in generating a modulation signal are different, positions of mapping points obtained by mapping signal points in the modulation signal onto a two-dimensional constellation diagram are different in each polarization direction, and distribution rules of constellation point subsets corresponding to the signal points are different. Therefore, according to the distribution rule that the distribution conditions of the constellation point subsets corresponding to the signal points in different polarization directions conform to, the multidimensional modulation mode used when the modulation signal is obtained through modulation can be identified.

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

1. A multi-dimensional signal modulation mode identification method is characterized by comprising the following steps:

receiving a modulation signal;

identifying a multidimensional modulation mode used when the modulation signal is obtained through modulation according to the distribution rule of the constellation point subsets corresponding to the signal points in each polarization direction, wherein the multidimensional modulation mode comprises the following steps:

2. The method according to claim 1, wherein the total characterization value is a total number of signal points, and the obtaining a characterization value for characterizing a distribution rule of a constellation point subset corresponding to each signal point according to the distribution rule of the constellation point subset corresponding to each signal point in each polarization direction includes:

3. The method according to claim 1, wherein the total characterization value is a logarithm of adjacent signal points, wherein the adjacent signal points are two signal points adjacent to each other in the modulation signal, and the obtaining a characterization value for characterizing a distribution rule of a constellation point subset corresponding to each signal point according to a distribution rule of the constellation point subset corresponding to each signal point in each polarization direction comprises:

4. The method of claim 1, wherein the total characterization value is: a total number of categories of a multi-dimensional subset sequence corresponding to the signal point, the multi-dimensional subset sequence comprising: a multi-dimensional subset of signal points corresponding to respective ones of the subsets of signal points, the multi-dimensional subset representing: the distribution rule of the constellation point subsets corresponding to the signal points in each polarization direction;

5. The method according to any of claims 1-4, wherein the determining the two-dimensional modulation scheme used when the modulation signal is obtained comprises:

clustering each space mapping point to obtain a clustering result;

6. A multi-dimensional signal modulation scheme identifying apparatus, the apparatus comprising:

the signal receiving module is used for receiving the modulation signal;

a modulation mode identification module, configured to identify, according to a distribution rule of a constellation point subset corresponding to each signal point in each polarization direction, a multidimensional modulation mode used when the modulation signal is obtained through modulation, where the modulation mode identification module includes:

7. 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 one of claims 1 to 5 when executing a program stored in the memory.

8. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, which computer program, when being executed by a processor, carries out the method steps of any one of the claims 1-5.