CN118054995A

CN118054995A - Channel modulation mode detection method and device

Info

Publication number: CN118054995A
Application number: CN202410101557.8A
Authority: CN
Inventors: 敖惠波
Original assignee: Weizhun Beijing Electronic Technology Co ltd
Current assignee: Weizhun Beijing Electronic Technology Co ltd
Priority date: 2024-01-25
Filing date: 2024-01-25
Publication date: 2024-05-17

Abstract

The application provides a channel modulation mode detection method and device. The method comprises the following steps: hard demodulation is carried out on the modulated data to be detected according to each modulation mode in the alternative modulation mode group, so that demodulation bit sequences corresponding to each modulation mode are obtained, and a first demodulation sequence set is formed; modulating sequences in the first demodulation sequence set according to a corresponding debugging mode to obtain a modulation sequence set; acquiring error characteristic values corresponding to all modulation modes according to the modulation data to be detected, the modulation sequence set and the characteristic value correction factors corresponding to all the modulation modes; and selecting a modulation mode corresponding to the minimum error characteristic value as a modulation mode of the modulation data to be detected. The technical scheme of the embodiment of the application can improve the efficiency of the detection process of the channel modulation mode.

Description

Channel modulation mode detection method and device

Technical Field

The present application relates to the field of computer technologies, and in particular, to a method and an apparatus for detecting a channel modulation mode.

Background

There are various modulation schemes related to dedicated channels in the standards such as WCDMA (Wideband Code Division Multiple Access ), LTE (Long Term Evolution, long term evolution) and NR (New Radio, new air interface) set by 3GPP (3 rd Generation Partnership Project, third generation partnership project). In the signal detection processing process, the modulation mode of the channel to be detected needs to be detected according to the existing information.

The existing channel modulation mode detection technology generally carries out statistics of an energy histogram on the balanced signal, and judges the number of points where the actual observation constellation points fall in each domain according to the characteristics of the domain where the peak value of the standard energy distribution histogram of each modulation mode is located, thereby judging the modulation mode.

The detection method has complicated steps, so that the detection process efficiency of the modulation mode is lower.

Disclosure of Invention

In view of this, the embodiment of the application provides a method and a device for detecting a channel modulation mode, so as to solve the technical problem of low efficiency of a detection process of the modulation mode in the prior art.

In a first aspect of an embodiment of the present application, a method for detecting a channel modulation mode is provided, where the method includes: hard demodulation is carried out on the modulated data to be detected according to each modulation mode in the alternative modulation mode group, so that demodulation bit sequences corresponding to each modulation mode are obtained, and a first demodulation sequence set is formed; modulating sequences in the first demodulation sequence set according to a corresponding debugging mode to obtain a modulation sequence set; acquiring error characteristic values corresponding to all modulation modes according to the modulation data to be detected, the modulation sequence set and the characteristic value correction factors corresponding to all the modulation modes; and selecting a modulation mode corresponding to the minimum error characteristic value as a modulation mode of the modulation data to be detected.

In a second aspect of the embodiment of the present application, there is provided a channel modulation mode detection apparatus, including: the demodulation module is used for respectively carrying out hard demodulation on the modulation data to be detected according to each modulation mode in the alternative modulation mode group to obtain demodulation bit sequences corresponding to each modulation mode, and forming a first demodulation sequence set; the modulation module is used for modulating sequences in the first demodulation sequence set according to a corresponding debugging mode to obtain a modulation sequence set; the acquisition module is used for acquiring error characteristic values corresponding to the modulation modes according to the modulation data to be detected, the modulation sequence set and the characteristic value correction factors corresponding to the modulation modes; the selecting module is used for selecting a modulation mode corresponding to the minimum error characteristic value as the modulation mode of the modulation data to be detected.

In a third aspect of the embodiments of the present application, there is provided an electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the above method when executing the computer program.

In a fourth aspect of the embodiments of the present application, there is provided a readable storage medium storing a computer program which, when executed by a processor, implements the steps of the above method.

Compared with the prior art, the embodiment of the application has the beneficial effects that: according to the technical scheme provided by the embodiment of the application, the original modulated data to be detected and the error characteristic value of the demodulated data obtained after the secondary demodulation are obtained by carrying out hard demodulation on the modulated data to be detected according to different modulation modes, and the modulation mode is determined according to the error characteristic value, so that the detection efficiency of the channel modulation mode can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flow chart of a method for detecting a channel modulation mode according to an embodiment of the present application;

fig. 2 is a flow chart of another method for detecting a channel modulation mode according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a channel modulation mode detection device according to an embodiment of the present application;

Fig. 4 is a schematic structural diagram of an electronic 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.

The technical scheme of the invention can be applied to detection of any one of a Binary PHASE SHIFT KEYING (Binary phase shift keying), a Quadrature PHASE SHIFT KEYING (QPSK) modulation mode, a 16QAM modulation mode which is Quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM) of 16 phase and amplitude combinations, a 64QAM modulation mode which is QAM of 64 phase and amplitude combinations or a 256QAM which is QAM of 256 phase and amplitude combinations.

The channel modulation scheme detection scheme according to the embodiment of the present application will be described in detail with reference to the accompanying drawings.

Fig. 1 is a diagram of a channel modulation method according to an embodiment of the present application. The method provided by the embodiment of the application can be executed by any electronic device with computer processing capability, such as a terminal or a server. As shown in fig. 1, the channel modulation scheme detection method includes:

step S101, hard demodulation is carried out on the modulated data to be detected according to each modulation mode in the alternative modulation mode group, so as to obtain demodulation bit sequences corresponding to each modulation mode, and a first demodulation sequence set is formed.

Specifically, the alternative modulation scheme group includes at least any one of the following modulation schemes: binary phase shift keying, quadrature amplitude modulation of 16 phase and amplitude combinations, quadrature amplitude modulation of 64 phase and amplitude combinations, and quadrature amplitude modulation of 256 phase and amplitude combinations.

Step S102, modulating sequences in the first demodulation sequence set according to a corresponding debugging mode to obtain a modulation sequence set.

Step S103, obtaining error characteristic values corresponding to the modulation modes according to the modulation data to be detected, the modulation sequence set and the characteristic value correction factors corresponding to the modulation modes.

Step S104, selecting a modulation mode corresponding to the minimum error characteristic value as the modulation mode of the modulation data to be detected.

According to the technical scheme, the modulation mode is simply and reliably detected by demodulating and secondarily modulating the modulation data to be detected and introducing the correction factor based on the errors of the primary modulation data and the secondary modulation data, and the detection scheme of the modulation mode is simple, the operation amount is small, and meanwhile, the false detection rate is small.

Before step S101, before hard demodulation is performed on the modulated data to be detected according to each modulation mode in the alternative modulation mode group, channel estimation and channel equalization processing may also be performed on the modulated data to be detected.

Channel estimation refers to estimating the characteristics of a channel, and the existing method is blind channel estimation and pilot-based channel estimation, and generally has higher accuracy of pilot-based channel estimation, so that the method is applied to actual engineering scenes; after the channel estimation is obtained, a proper information transmission mode can be selected, so that the influence of the channel in the signal transmission process is reduced to a certain extent. Channel equalization generally refers to signal recovery at a receiving end, and also has blind equalization and equalization based on a training sequence, wherein the blind equalization has important significance because the blind equalization does not need the training sequence, saves bandwidth and can not send the training sequence in certain scenes; the equalization algorithm actually processes the received signal so that the signal is easily distinguishable.

The data amplitude and the phase of the modulated data to be detected which are subjected to channel estimation and channel equalization are subjected to normalization processing, and the repeated channel estimation and joint detection are not needed, so that the hard decision of the modulated data to be detected can be conveniently carried out.

In step S101, when the to-be-detected modulated data are respectively hard-demodulated according to each modulation mode in the alternative modulation mode group, the to-be-detected modulated data may be respectively hard-demodulated according to each modulation mode in the alternative modulation mode group to obtain bit sequences corresponding to each modulation mode, so as to form a second demodulation sequence set, and hard-decision is performed on sequences in the second demodulation sequence set according to the corresponding debug mode.

Further, when the sequences in the second demodulation sequence set are subjected to hard decision according to the corresponding debugging mode, a decision area in which the sequences in the second demodulation sequence set fall can be determined according to the mapping relation of the constellation diagram of the corresponding debugging mode, and a code element corresponding to the decision area is used as an element of the demodulation bit sequence.

In the related art, taking a QAM modulation mode as an example, in the modulation process, a signal is divided into two paths, one path is i, the other path is q, and the two paths of signals are orthogonal. The amplitude of any one i and the amplitude of any one q are combined to map a corresponding constellation point on the polar graph, so that each constellation point represents a mapping, and various possible data state combinations of i and q are finally mapped on the constellation graph.

Determining a judging area in which a sequence in the second demodulation sequence set falls according to the mapping relation of the constellation diagram of the corresponding debugging mode, namely judging elements in the sequence in the second demodulation sequence set to the judging area of the corresponding constellation diagram according to the vector characteristics and the Hamming distance of the sequence in the second demodulation sequence set, and taking a code element corresponding to the judging area as an element of a demodulation bit sequence. The hard decision process is a process of calculating a hamming distance, and classifying the elements in the sequences in the second demodulation sequence set according to the hamming distance, where the hamming distance is the sum of absolute values of the abscissa and the ordinate of the elements in the sequences in the second demodulation sequence set.

In step S103, according to the modulation data to be detected and the modulation sequence set, an average vector error of each sequence in the modulation data to be detected and the modulation sequence set may be obtained; and obtaining an error characteristic value according to the average vector error and the corresponding characteristic value correction factor to form an error characteristic value set.

Further, when the average vector error of each sequence in the modulation data to be detected and the modulation sequence set is obtained, the root mean square of the difference between the element of the modulation data to be detected and the corresponding element of the current sequence in the modulation sequence set can be obtained as the average vector error of the modulation data to be detected and the current sequence.

In the embodiment of the present application, the modulation modes in the alternative modulation mode group may include any one of the following: binary phase shift keying, quadrature amplitude modulation of 16 phase and amplitude combinations, quadrature amplitude modulation of 64 phase and amplitude combinations, and quadrature amplitude modulation of 256 phase and amplitude combinations.

Further, the modulation scheme in the alternative modulation scheme group is not limited to the above, and for example, it may also include quadrature amplitude modulation of 32 symbols and quadrature amplitude modulation of 128 symbols. In one embodiment of the present application, the modulation schemes in the alternative modulation scheme set may include binary phase shift keying, quadrature amplitude modulation of 16 phase and amplitude combinations, quadrature amplitude modulation of 64 phase and amplitude combinations, quadrature amplitude modulation of 256 phase and amplitude combinations, quadrature amplitude modulation of 32 symbols, and quadrature amplitude modulation of 7 modulation schemes of 128 symbols. The modulation schemes in the alternative modulation scheme group may also include any 6 modulation schemes, any 5 modulation schemes, any 4 modulation schemes, any 5 modulation schemes, and any 2 modulation schemes among binary phase shift keying, quadrature amplitude modulation of 16 phase and amplitude combinations, quadrature amplitude modulation of 64 phase and amplitude combinations, quadrature amplitude modulation of 256 phase and amplitude combinations, quadrature amplitude modulation of 32 symbols, and quadrature amplitude modulation of 7 modulation schemes of 128 symbols.

In practical applications, several kinds of possible modulation schemes of a channel are often known, and when detecting a modulation scheme, only one kind needs to be determined among the several kinds of modulation schemes. Therefore, the technical schemes of step S101 to step S104 can be applied, and the channel modulation scheme can be detected according to the type of the modulation scheme known to the signal.

Specifically, step S101 may be applied to each modulation mode to obtain a hard demodulation sequence when different modulation modes are applied to the to-be-detected modulation data, and step S102 may be applied to the hard demodulation sequence when different modulation modes are applied to the to-be-detected modulation data to obtain modulation data corresponding to the different hard demodulation sequences. In step S103, according to the different modulation data and the error of the modulation data to be detected obtained in step S102, the error characteristic value when different modulation modes are applied can be obtained. In step S104, the different error feature values obtained in step S103 are compared, and the smallest error feature value is obtained, and the modulation mode corresponding to the error feature value is the modulation mode of the modulated data to be detected.

The following details the modulation mode detection procedure according to the embodiment of the present application, taking five modulation modes including binary phase shift keying, quadrature amplitude modulation of 16 phase and amplitude combinations, quadrature amplitude modulation of 64 phase and amplitude combinations, and quadrature amplitude modulation of 256 phase and amplitude combinations as examples:

For the modulated data sequences X (1, the..n.), demodulation is performed according to the modulation modes of BPSK, QPSK, 16QAM, 64QAM, 256QAM, respectively, and the demodulated sequences A0 (1, the..n.), B0 (1, the.. 2*N), C0 (1, the.. 4*N), D0 (1, the.. 6*N), and E0 (1, the.. 8*N) are correspondingly obtained. The modulated data sequence X (1,) N is the modulated data to be detected. The demodulated sequences A0 (1, N), B0 (1, 2*N), C0 (1, 4*N), D0 (1, 6*N), E0 (1, 8*N) are hard-decided according to the corresponding modulation scheme, the desired sequence A1 (1..the., N), B1 (1..the., 2*N), C1 (1..the., 4*N), D1 (1..the., 6*N), E1 (1..the., 8*N) was obtained. For the sequences A1 (1..once., N), B1 (1..once., 2*N), C1 (1..once., 4*N), D1 (1..once., 6*N), E1 (1..once., 8*N) are modulated according to the corresponding modulation scheme, the desired sequence A2 (1..the., N), B2 (1..the., N), C2 (1..the., N), D2 (1..the., N), E2 (1..the., N) was obtained. Average vector error EvmA of A2 sequence corresponding to modulation scheme BPSK, average vector error EvmB of B2 sequence corresponding to modulation scheme QPSK, average vector error EvmC of C2 sequence corresponding to modulation scheme 16QAM, average vector error EvmD of D2 sequence corresponding to modulation scheme 64QAM, and average vector error EvmE of E2 sequence corresponding to modulation scheme 256QAM are calculated for modulation data sequence X.

And obtaining a corresponding error characteristic value according to the average vector error and the corresponding characteristic value correction factor. Specifically, an error eigenvalue facterA = EvmA × QmBpsk corresponding to the BPSK modulation scheme, where QmBpsk is a correction factor of the error eigenvalue in the BPSK modulation scheme. Error eigenvalue facterB = EvmB × QmBpsk corresponding to the modulation scheme QPSK, where QmBpsk is a correction factor of the error eigenvalue in the QPSK modulation scheme. Error eigenvalues facterC = EvmC × QmQ16 corresponding to modulation scheme 16QAM, where QmQ is a correction factor for error eigenvalues in 16QAM modulation scheme. Error eigenvalues facterD = EvmD × QmQ64 corresponding to modulation scheme 64QAM, where QmQ is a correction factor for the error eigenvalues in the modulation scheme of 64 QAM. Error eigenvalues facterE = EvmE × QmQ256 corresponding to the modulation scheme 256QAM, where QmQ is a correction factor for the error eigenvalues in the 256QAM modulation scheme.

In the embodiment of the present application, the correction factor QmBpsk of the error feature value, the correction factor QmBpsk of the error feature value, the correction factor QmQ of the error feature value, the correction factor QmQ64 of the error feature value, and the correction factor QmQ256 of the error feature value may be set according to empirical data.

After the corresponding error characteristic value is obtained, selecting the modulation mode corresponding to the minimum error characteristic value from the error characteristic value facterA, the error characteristic value facterB, the error characteristic value facterC, the error characteristic value facterD and the error characteristic value facterE as a detection result of the modulated data to be detected. For example, if the error eigenvalue facterD is the smallest, the modulation scheme 64QAM corresponding to the error eigenvalue facterD is the modulation scheme of the modulated data to be detected.

In the scheme, the average vector error of the modulation data sequence and the secondary modulation sequence is obtained according to the root mean square of the difference value of the corresponding elements of the modulation data sequence and the secondary modulation sequence. Taking the calculation process of the average vector error EvmA of the A2 sequence corresponding to the modulation data sequence X and the modulation scheme BPSK as an example, the average vector error EvmA of the A2 sequence corresponding to the modulation data sequence X and the modulation scheme BPSK may be calculated according to the following formula (1):

（1）

Where n +1 is the number of elements in the modulated data sequence, For modulating the nth element of the data sequence X,/>The n-th element of the sequence of the secondary modulation data sequence A2, k is an integer, and k is less than or equal to n.

Average vector error EvmB to average vector error EvmE can also be obtained from a formula similar to formula (1). For example, the average vector error EvmB may be calculated according to the following equation (2):

（1）

Where n +1 is the number of elements in the modulated data sequence, For modulating the nth element of the data sequence X,/>The n-th element of the secondary modulation data sequence B2 is k which is an integer and is less than or equal to n.

As shown in fig. 2, in the channel modulation scheme detection method according to an embodiment of the present application, the channel modulation scheme is one of four modulation schemes, and the channel modulation scheme detection method includes the steps of:

Step S211, hard demodulation is performed on the modulated data to be detected according to the four modulation modes, so as to obtain four demodulation bit sequences corresponding to the four modulation modes.

Step S212, the four demodulation bit sequences are modulated according to the corresponding debugging modes respectively, and four secondary modulation data sequences are correspondingly obtained.

Step S213, four average vector errors corresponding to the four modulation modes are obtained according to the modulation data to be detected and the four secondary modulation data sequences.

Step S214, obtaining error characteristic values corresponding to the four modulation modes according to the four average vector errors and characteristic value correction factors corresponding to the four modulation modes.

Step S215, selecting a modulation mode corresponding to the minimum error characteristic value as the modulation mode of the modulation data to be detected.

In the channel modulation mode detection method of the embodiment of the application, the original modulated data to be detected and the error characteristic value of the demodulated data obtained after the secondary demodulation are obtained by carrying out hard demodulation on the modulated data to be detected according to different modulation modes and determining the modulation mode according to the error characteristic value, so that the detection efficiency of the channel modulation mode can be improved.

The following are examples of the apparatus of the present application that may be used to perform the method embodiments of the present application. The channel modulation scheme detection apparatus described below and the channel modulation scheme detection method described above may be referred to correspondingly to each other. For details not disclosed in the embodiments of the apparatus of the present application, please refer to the embodiments of the method of the present application.

Fig. 3 is a schematic diagram of a channel modulation mode detection apparatus according to an embodiment of the present application. As shown in fig. 3, the channel modulation scheme detection apparatus includes:

The demodulation module 301 is configured to hard demodulate the to-be-detected modulated data according to each modulation mode in the alternative modulation mode group, to obtain a demodulated bit sequence corresponding to each modulation mode, and form a first demodulation sequence set.

The modulating module 302 is configured to modulate the sequences in the first demodulation sequence set according to a corresponding debug mode, so as to obtain a modulation sequence set.

The obtaining module 303 is configured to obtain error feature values corresponding to each modulation mode according to the to-be-detected modulation data, the modulation sequence set, and feature value correction factors corresponding to each modulation mode.

The selecting module 304 is configured to select a modulation mode corresponding to the minimum error feature value as a modulation mode of the modulated data to be detected.

The channel modulation mode detection device of the embodiment of the application can further comprise a preprocessing module, which is used for carrying out channel estimation and channel equalization processing on the modulated data to be detected before dividing the modulated data to be detected into a first number of first modulation arrays according to the first modulation mode.

When the demodulation module 301 performs hard demodulation on the to-be-detected modulated data according to each modulation mode in the alternative modulation mode group, the to-be-detected modulated data may be subjected to hard demodulation according to each modulation mode in the alternative modulation mode group, so as to obtain bit sequences corresponding to each modulation mode, form a second demodulation sequence set, and perform hard decision on sequences in the second demodulation sequence set according to corresponding debug modes.

Further, when the demodulation module 301 performs hard decision on the sequences in the second demodulation sequence set according to the corresponding debug mode, a decision region in which the sequences in the second demodulation sequence set fall may be determined according to a mapping relationship of a constellation diagram of the corresponding debug mode, and a symbol corresponding to the decision region may be used as an element of the demodulation bit sequence.

When determining a decision region in which a sequence in the second demodulation sequence set falls according to the mapping relationship of the constellation diagram of the corresponding debug mode, the demodulation module 301 decides elements in the sequence in the second demodulation sequence set to the decision region of the corresponding constellation diagram according to the vector features and hamming distances of the sequence in the second demodulation sequence set, and takes a symbol corresponding to the decision region as an element of a demodulation bit sequence. The hard decision process is a process of calculating a hamming distance and classifying elements in sequences in the second demodulation sequence set according to the hamming distance.

The obtaining module 303 may obtain average vector errors of each sequence in the modulation data to be detected and the modulation sequence set according to the modulation data to be detected and the modulation sequence set; and obtaining an error characteristic value according to the average vector error and the corresponding characteristic value correction factor to form an error characteristic value set.

Further, the modulation scheme in the alternative modulation scheme group is not limited to the above, and for example, it may also include quadrature amplitude modulation of 32 symbols and quadrature amplitude modulation of 128 symbols. In one embodiment of the present application, the modulation schemes in the alternative modulation scheme set may include binary phase shift keying, quadrature amplitude modulation of 16 phase and amplitude combinations, quadrature amplitude modulation of 64 phase and amplitude combinations, quadrature amplitude modulation of 256 phase and amplitude combinations, quadrature amplitude modulation of 32 symbols and quadrature amplitude modulation of 128 symbols, 7 modulation schemes, or any 6 modulation schemes, any 5 modulation schemes, any 4 modulation schemes, any 5 modulation schemes, and any 2 modulation schemes among the 7 modulation schemes.

In practical applications, several kinds of possible modulation schemes of a channel are often known, and when detecting a modulation scheme, only one kind needs to be determined among the several kinds of modulation schemes. Therefore, the channel modulation scheme detection device can detect the channel modulation scheme according to the type of modulation scheme known to the signal.

In the embodiment of the present application, the correction factor of the error feature value may be set according to empirical data.

（1）

Since each functional module of the channel modulation scheme detection apparatus according to the exemplary embodiment of the present application corresponds to a step of the exemplary embodiment of the channel modulation scheme detection method, for details not disclosed in the apparatus embodiment of the present application, please refer to the embodiment of the channel modulation scheme detection method according to the present application.

According to the channel modulation mode detection device provided by the embodiment of the application, the original modulated data to be detected and the error characteristic value of the demodulated data obtained after the secondary demodulation are obtained by performing hard demodulation on the modulated data to be detected according to different modulation modes, and the modulation mode is determined according to the error characteristic value, so that the detection efficiency of the channel modulation mode can be improved.

Fig. 4 is a schematic diagram of an electronic device 4 according to an embodiment of the present application. As shown in fig. 4, the electronic apparatus 4 of this embodiment includes: a processor 401, a memory 402 and a computer program 403 stored in the memory 402 and executable on the processor 401. The steps of the various method embodiments described above are implemented by processor 401 when executing computer program 403. Or the processor 401, when executing the computer program 403, performs the functions of the modules in the above-described device embodiments.

The electronic device 4 may be a desktop computer, a notebook computer, a palm computer, a cloud server, or the like. The electronic device 4 may include, but is not limited to, a processor 401 and a memory 402. It will be appreciated by those skilled in the art that fig. 4 is merely an example of the electronic device 4 and is not limiting of the electronic device 4 and may include more or fewer components than shown, or different components.

The Processor 401 may be a central processing unit (Central Processing Unit, CPU) or may be other general purpose Processor, digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like.

The memory 402 may be an internal storage unit of the electronic device 4, for example, a hard disk or a memory of the electronic device 4. The memory 402 may also be an external storage device of the electronic device 4, such as a plug-in hard disk, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD) or the like, which are provided on the electronic device 4. Memory 402 may also include both internal storage units and external storage devices of electronic device 4. The memory 402 is used to store computer programs and other programs and data required by the electronic device.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit.

The integrated modules may be stored in a readable storage medium if implemented in the form of software functional units and sold or used as a stand-alone product. Based on such understanding, the present application may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, and the computer program may be stored in a readable storage medium, where the computer program may implement the steps of the method embodiments described above when executed by a processor. The computer program may comprise computer program code, which may be in source code form, object code form, executable file or in some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the content of the computer readable medium can be appropriately increased or decreased according to the requirements of the jurisdiction's jurisdiction and the patent practice, for example, in some jurisdictions, the computer readable medium does not include electrical carrier signals and telecommunication signals according to the jurisdiction and the patent practice.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. A method for detecting a channel modulation scheme, the method comprising:

Respectively performing hard demodulation on the modulated data to be detected according to each modulation mode in the alternative modulation mode group to obtain demodulation bit sequences corresponding to each modulation mode, and forming a first demodulation sequence set;

Modulating sequences in the first demodulation sequence set according to a corresponding debugging mode to obtain a modulation sequence set;

Acquiring error characteristic values corresponding to all the modulation modes according to the modulation data to be detected, the modulation sequence set and the characteristic value correction factors corresponding to all the modulation modes;

And selecting a modulation mode corresponding to the minimum error characteristic value as the modulation mode of the modulation data to be detected.

2. The method of claim 1, wherein obtaining the error feature value corresponding to each modulation scheme according to the to-be-detected modulation data, the modulation sequence set, and the feature value correction factor corresponding to each modulation scheme comprises:

acquiring average vector errors of the modulation data to be detected and each sequence in the modulation sequence set;

And obtaining an error characteristic value according to the average vector error and the corresponding characteristic value correction factor to form an error characteristic value set.

3. The method of claim 2, wherein obtaining the average vector error for each sequence in the set of modulation sequences and the modulated data to be detected comprises:

And acquiring root mean square of difference values of elements of the modulation data to be detected and corresponding elements of a current sequence in the modulation sequence set as the average vector error of the modulation data to be detected and the current sequence.

4. The method of claim 1, wherein the set of alternative modulation schemes comprises at least any one of the following modulation schemes:

Binary phase shift keying, quadrature amplitude modulation of 16 phase and amplitude combinations, quadrature amplitude modulation of 64 phase and amplitude combinations, and quadrature amplitude modulation of 256 phase and amplitude combinations.

5. The method of claim 1, wherein hard demodulating the modulated data to be detected according to each modulation scheme in the set of alternative modulation schemes comprises:

Respectively performing hard demodulation on the modulation data to be detected according to each modulation mode in the alternative modulation mode group to obtain bit sequences corresponding to each modulation mode, and forming a second demodulation sequence set;

And carrying out hard decision on sequences in the second demodulation sequence set according to a corresponding debugging mode.

6. The method of claim 5, wherein hard-deciding the sequences in the second set of demodulation sequences according to the corresponding debug mode comprises: determining a judgment region in which a sequence in the second demodulation sequence set falls according to the mapping relation of the constellation diagram of the corresponding debugging mode;

And taking the code element corresponding to the judging area as an element of the demodulation bit sequence.

7. The method of claim 1, wherein before hard demodulating the modulated data to be detected according to each modulation scheme in the set of alternative modulation schemes, the method further comprises:

and carrying out channel estimation and channel equalization processing on the modulated data to be detected.

8. A channel modulation scheme detection apparatus, the apparatus comprising:

The demodulation module is used for respectively carrying out hard demodulation on the to-be-detected modulation data according to each modulation mode in the alternative modulation mode group to obtain demodulation bit sequences corresponding to each modulation mode to form a first demodulation sequence set;

The modulation module is used for modulating sequences in the first demodulation sequence set according to a corresponding debugging mode to obtain a modulation sequence set;

The acquisition module is used for acquiring error characteristic values corresponding to the modulation modes according to the modulation data to be detected, the modulation sequence set and the characteristic value correction factors corresponding to the modulation modes;

And the selecting module is used for selecting a modulation mode corresponding to the minimum error characteristic value as the modulation mode of the modulation data to be detected.

9. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 7 when the computer program is executed.

10. A readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any one of claims 1 to 7.