A method and apparatus for information transmission in a wired network

Abstract

This invention discloses a method and apparatus for information transmission in a wired network. The apparatus includes: an information modulation module, a power line coupling module, a power line, a power line decoupling module, and an information demodulation module. The information modulation module is used to modulate the information to be transmitted, converting it into a high-frequency modulated signal suitable for transmission on the power line. The power line coupling module connects the information modulation module and the power line, and is used to couple the high-frequency modulated signal onto the power line for transmission. The power line is used to transmit the high-frequency modulated signal. The power line decoupling module connects the power line and the information demodulation module, and is used to decouple the high-frequency modulated signal on the power line to the information demodulation module. The information demodulation module is used to demodulate the decoupled high-frequency modulated signal to restore the information to be transmitted.

Description

Technical Field

[0001] This invention relates to the fields of industrial data processing, information transmission and strategy optimization, and specifically to an information transmission method and apparatus for a wired network. Background Technology

[0002] In existing information transmission networks, twisted-pair cable, as a commonly used transmission medium, is widely applied in various data communication scenarios. However, with the rapid development of information technology, the amount of data transmission is constantly increasing, and the requirements for transmission rate and distance are also rising. The transmission capabilities of traditional twisted-pair cable have gradually revealed many shortcomings. When transmitting high-frequency signals, twisted-pair cable experiences severe signal attenuation, which limits further increases in transmission rate. When the transmission rate reaches a certain level, the signal will become distorted due to attenuation, leading to an increased data transmission error rate. Furthermore, twisted-pair cable has a limited transmission distance. For long-distance transmission, it is necessary to frequently set up repeater equipment to enhance the signal, which not only increases system costs but also reduces system stability and reliability.

[0003] Meanwhile, power lines are widely distributed in modern society, covering almost all buildings and areas. Utilizing power lines for information transmission would make full use of existing power infrastructure, avoiding the need to lay extensive new transmission cables and significantly reducing construction costs. Furthermore, power line communication also needs to address the issue of multi-user information transmission. How to distinguish signals from different users on power lines and avoid mutual interference is also a pressing problem to be solved.

[0004] Therefore, researching a technology that utilizes power lines to transmit information in order to solve the problem of insufficient transmission capacity of traditional twisted-pair cables is of great practical significance. Summary of the Invention

[0005] This invention primarily addresses the problem of insufficient transmission capacity of traditional twisted-pair cables by utilizing power lines for information transmission. This invention discloses a method and apparatus for information transmission in wired networks.

[0006] In a first aspect, the present invention discloses an information transmission device for a wired network, comprising: an information modulation module, a power line coupling module, a power line, a power line decoupling module, and an information demodulation module;

[0007] The information modulation module is used to modulate the information to be transmitted to obtain a high-frequency modulated signal; the information to be transmitted includes a sequence of information to be transmitted for each user;

[0008] The power line coupling module connects the information modulation module and the power line, and is used to couple high-frequency modulation signals onto the power line for transmission.

[0009] The power lines are used to transmit high-frequency modulated signals;

[0010] The power line decoupling module connects the power line and the information demodulation module, and is used to decouple the high-frequency modulation signal on the power line to the information demodulation module.

[0011] The information demodulation module is used to demodulate the decoupled high-frequency modulated signal and restore the information to be transmitted.

[0012] The information modulation module modulates the information to be transmitted to obtain a high-frequency modulated signal, including:

[0013] The information to be transmitted is processed to obtain modulation parameter information;

[0014] The information to be transmitted is modulated using modulation parameter information to obtain a high-frequency modulated signal.

[0015] The process of processing the modulation parameters of the information to be transmitted to obtain modulation parameter information includes:

[0016] Obtain the sampling time interval T of the information to be transmitted;

[0017] The frame duration T is calculated by combining the sampling time interval T and the information to be transmitted. f and time scaling factor θ;

[0018] Based on frame time length T f The pulse duration T is calculated using the time scaling factor θ. s T s =T f / θ;

[0019] For each user's information sequence to be transmitted, user characteristics are calculated to obtain the modulation pulse energy and modulation factor for each user.

[0020] Using modulation factor, modulation pulse energy, and frame time length T f and pulse duration T s The modulation parameter information is then constructed.

[0021] The frame duration T is calculated by combining the sampling time interval T and the information to be transmitted. f And the time scaling factor θ, including:

[0022] A transmission matrix is ​​constructed by using the sequence of information to be transmitted for each user in the information to be transmitted as a row vector;

[0023] The norm, trace, and rank of the transfer matrix are calculated.

[0024] The variance of the mean of all row vectors of the transmission matrix is ​​statistically obtained;

[0025] The frame time length T is obtained by calculating the sampling time interval T, norm value, trace value, and rank value. f ;

[0026] The transmission matrix is ​​decomposed to obtain a left decomposition matrix, an eigenvalue matrix, and a right decomposition matrix;

[0027] Extract the diagonal elements of the feature matrix to obtain the feature vector;

[0028] Linear fitting is performed on the elements and element index values ​​of the feature vector to obtain an approximate polynomial;

[0029] Using the mean of each row vector of the left decomposition matrix as the independent variable, the approximation polynomial is input to obtain the corresponding output vector;

[0030] The ratio of the maximum absolute value to the minimum absolute value of all elements in the output vector is determined as the time scaling factor θ.

[0031] The frame time length T f The calculation expression is:

[0032]

[0033] Where N is the row dimension of the transmission matrix, α, β, and γ are the norm, trace, and rank, respectively, ρ is the variance of the mean of all row vectors of the transmission matrix, and L2() represents the second-order Legendre function.

[0034] The process of performing user feature calculations on the transmission information sequence for each user to obtain the modulation pulse energy and modulation factor for each user includes:

[0035] Statistical processing is performed on the information sequence to be transmitted for each user to obtain a statistical information set for each user; the statistical information set includes the mean, variance, median, range, and frequency domain fluctuation value of the information sequence to be transmitted; the frequency domain fluctuation value is the square root of the variance of the first derivative of the FFT sequence of the information sequence to be transmitted divided by the variance of the information sequence to be transmitted.

[0036] The modulation pulse energy of each user is calculated by performing a set of statistical information on the statistical information set of each user.

[0037] A transmission matrix is ​​constructed by using the sequence of information to be transmitted for each user in the information to be transmitted as a row vector;

[0038] Factor calculations are performed on the transmission matrix to obtain the modulation factor for each user.

[0039] The expression for calculating the modulation pulse energy is:

[0040]

[0041] in, Let E0 be the modulation pulse energy of the k-th user, and E1 be the standard energy value. k a2 k a3 k a4 k a5 k These represent the mean, variance, median, range, and frequency domain fluctuation of the k-th information sequence to be transmitted, respectively. T2() represents the second-order polynomial of the second-kind Chebyshev polynomial, and E0 is the preset energy standard value.

[0042] The expression for the factor calculation is:

[0043]

[0044] Where δ(k) is the modulation factor of the k-th user, y kj Let y be the element in the k-th row and j-th column of the transfer matrix. j Let M be the variance of the j-th column of the transmission matrix, where M is the column dimension of the transmission matrix and also the length of the information sequence to be transmitted.

[0045] The process of modulating the information to be transmitted using modulation parameter information to obtain a high-frequency modulated signal includes:

[0046] The lowest frequency f for obtaining power line information transmission L and the highest frequency f U ;

[0047] Based on each user's modulation factor and minimum frequency f L highest frequency f U and T s Construct the pulse solution model for each user;

[0048] The pulse solution model for each user is solved to obtain the modulation pulse waveform for each user;

[0049] By using the modulation pulse waveform of each user, the information sequence to be transmitted by each user is pulse-modulated to obtain the modulation signal of each user;

[0050] The modulation parameter information is subjected to OFDM modulation to obtain the modulation head signal;

[0051] A high-frequency modulated signal is constructed using the modulator signal and the modulated signals of all users.

[0052] The expression for the impulse solution model of the k-th user is:

[0053]

[0054] h(t) = 2f U sinc(2f U t)-2f L sinc(2f L t),

[0055] Where t is the time variable, τ is the time shift variable, h(t) is the intermediate function, sinc is the singer function, δ(k) is the modulation factor of the k-th user, and p k (t) represents the modulation pulse waveform of the k-th user to be solved.

[0056] The beneficial effects of this invention are as follows:

[0057] This invention modulates the information to be transmitted through an information modulation module, converting it into a high-frequency modulated signal suitable for transmission on power lines. This process not only takes into account the transmission characteristics of power lines, but also performs personalized modulation parameter processing for each user's information sequence to be transmitted, thereby improving the signal transmission performance and anti-interference capability on power lines.

[0058] In the demodulation process, this invention's information demodulation module accurately reconstructs the information sequence to be transmitted for each user by precisely demodulating the high-frequency modulated signal. In particular, by utilizing each user's time-hop sequence to determine the position of the modulated data and identifying the corresponding data to be transmitted based on the data modulation time shift, this unique demodulation method further improves the accuracy and reliability of multi-user information transmission and effectively avoids mutual interference between signals from different users. Furthermore, in the modulation parameter processing, this invention obtains precise frame time length and time scaling factor through comprehensive calculation of parameters such as the sampling time interval, the norm, trace, and rank of the transmission matrix, providing a scientific basis for signal modulation and demodulation and further optimizing signal transmission performance. Attached Figure Description

[0059] Figure 1 This is a diagram showing the composition of the device of the present invention. Detailed Implementation

[0060] To better understand the content of this invention, an embodiment is provided here.

[0061] Figure 1 This is a diagram showing the composition of the device of the present invention.

[0062] In a first aspect, the present invention discloses an information transmission device for a wired network, comprising: an information modulation module, a power line coupling module, a power line, a power line decoupling module, and an information demodulation module;

[0063] The information modulation module is used to modulate the information to be transmitted and convert it into a high-frequency modulation signal suitable for transmission on power lines; the information to be transmitted includes a sequence of information to be transmitted for each user;

[0064] The power line coupling module connects the information modulation module and the power line, and is used to couple high-frequency modulation signals onto the power line for transmission.

[0065] Power lines are used to transmit high-frequency modulated signals;

[0066] The power line decoupling module connects the power line and the information demodulation module, and is used to decouple the high-frequency modulation signal on the power line to the information demodulation module.

[0067] The information demodulation module is used to demodulate the decoupled high-frequency modulated signal and restore the information to be transmitted.

[0068] The information modulation module modulates the information to be transmitted, converting it into a high-frequency modulated signal suitable for transmission over power lines, including:

[0069] The information to be transmitted is processed to obtain modulation parameter information;

[0070] The information to be transmitted is modulated using modulation parameter information to obtain a high-frequency modulated signal;

[0071] The information demodulation module demodulates the decoupled high-frequency modulated signal to restore the information to be transmitted, including:

[0072] From the high-frequency modulation signal, obtain the modulation head signal corresponding to the modulation parameter information;

[0073] The modulation head signal is demodulated using OFDM to obtain modulation parameter information;

[0074] Using the modulation parameter information, the high-frequency modulation signal is demodulated to obtain the information sequence to be transmitted for each user;

[0075] The information to be transmitted is obtained by using the sequence of information to be transmitted from all users;

[0076] The demodulation process of the high-frequency modulated signal involves using the time-hopping sequence of each user to determine the position of the modulated data, and then determining the corresponding data to be transmitted based on the data modulation time shift of the modulated data. The correspondence between the user's data modulation time shift and the data to be transmitted is stored in the information modulation module and the information demodulation module.

[0077] The power line coupling module includes a first high-frequency transformer and a first coupling capacitor; the first high-frequency transformer is used to transmit the high-frequency modulation signal from the information modulation module to the first coupling capacitor; the first coupling capacitor is connected between the first high-frequency transformer and the power line, so as to couple the high-frequency modulation signal to the power line, while preventing the power signal on the power line from entering the information transmission device.

[0078] The power line decoupling module includes a second high-frequency transformer and a second coupling capacitor. The second coupling capacitor is connected between the second high-frequency transformer and the power line to couple the high-frequency modulation signal from the power line to the second high-frequency transformer, while preventing the power signal on the power line from entering the information transmission device. The second high-frequency transformer is used to couple the high-frequency modulation signal to the information demodulation module.

[0079] The process of processing the modulation parameters of the information to be transmitted to obtain modulation parameter information includes:

[0080] Obtain the sampling time interval T of the information to be transmitted;

[0081] The frame duration T is calculated by combining the sampling time interval T and the information to be transmitted. f and time scaling factor θ;

[0082] Based on frame time length T f The pulse duration T is calculated using the time scaling factor θ. s T s =T f / θ;

[0083] For each user's information sequence to be transmitted, user characteristics are calculated to obtain the modulation pulse energy and modulation factor for each user.

[0084] Using modulation factor, modulation pulse energy, and frame time length T f and pulse duration t s The modulation parameter information is then constructed.

[0085] The frame duration T is calculated by combining the sampling time interval T and the information to be transmitted. f And the time scaling factor θ, including:

[0086] A transmission matrix is ​​constructed by using the sequence of information to be transmitted for each user in the information to be transmitted as a row vector;

[0087] The norm, trace, and rank of the transfer matrix are calculated.

[0088] The variance of the mean of all row vectors of the transmission matrix is ​​statistically obtained;

[0089] The frame time length T is obtained by calculating the sampling time interval T, norm value, trace value, and rank value. f ;

[0090] The frame time length t f The calculation expression is:

[0091]

[0092] Where N is the row dimension of the transmission matrix, α, β, and γ are the norm, trace, and rank, respectively, ρ is the variance of the mean of all row vectors of the transmission matrix, and L2() represents the second-order Legendre function.

[0093] The frame time length T f The calculation expression integrates multiple information components, including the norm α, trace β, rank γ of the transmission matrix, and the variance ρ of the means of all row vectors. Different matrix eigenvalues ​​reflect different characteristics of the information to be transmitted. By incorporating these eigenvalues ​​into the calculation, the overall characteristics of the information to be transmitted can be described more comprehensively and accurately. For example, the norm reflects the overall size of the matrix elements, the trace is related to the sum of the matrix's eigenvalues, the rank reflects the linear independence of the matrix, and the variance reflects the dispersion of the row vector means. The frame duration T calculated by combining these information components... f It can better adapt to the actual situation of the information to be transmitted and avoid inaccuracies caused by the limitations of a single feature.

[0094] The frame time length T f The expression incorporates the sampling time interval T and the row dimension N of the transmission matrix, allowing the frame duration to be adaptively adjusted based on the sampling characteristics of the information to be transmitted and the number of users. In practical applications, different sampling frequencies and user scales will have different impacts on information transmission. By combining T and N in the calculation, the frame duration can be made more consistent with actual transmission requirements, improving the efficiency and stability of information transmission.

[0095] The transmission matrix is ​​decomposed to obtain a left decomposition matrix, a characteristic matrix, and a right decomposition matrix;

[0096] Extract the diagonal elements of the feature matrix to obtain the feature vector;

[0097] Linear fitting is performed on the elements and element index values ​​of the feature vector to obtain an approximate polynomial;

[0098] Using the mean of each row vector of the left decomposition matrix as the independent variable, the approximation polynomial is input to obtain the corresponding output vector;

[0099] The ratio of the maximum absolute value to the minimum absolute value of all elements in the output vector is determined as the time scaling factor θ.

[0100] By decomposing the transmission matrix, extracting eigenvectors, and performing linear fitting to obtain an approximating polynomial, the output vector is calculated using the mean of the row vectors in the left decomposition matrix, ultimately determining the time scaling factor. This method delves into the intrinsic characteristics of the transmission matrix, capturing hidden patterns and regularities within the transmitted information. The eigenvectors reflect the essential characteristics of the matrix, while the approximating polynomial obtained through linear fitting effectively models and predicts these characteristics. The time scaling factor calculated in this way more accurately reflects the temporal characteristics of the transmitted information, providing more precise parameters for subsequent pulse duration calculations.

[0101] The decomposition process is calculated using the following expression:

[0102] Y = UAV,

[0103] Where U is the left decomposition matrix, Y is the transfer matrix, A is the characteristic matrix, V is the right decomposition matrix, U and V are both orthogonal matrices, and A is a diagonal matrix;

[0104] The decomposition process can be implemented using the singular value decomposition algorithm.

[0105] The linear fitting process involves using the element index of the characteristic vector as the known independent variable and the element value of the feature vector as the known dependent variable. A curve to be approximated is constructed using the known independent and dependent variables. The curve to be approximated is then fitted using the function approximation method to obtain the approximation polynomial.

[0106] The variance of the mean of all row vectors is obtained by taking the variance of the mean of all row vectors.

[0107] The singular values ​​of the transmission matrix are obtained through a singular value calculation algorithm;

[0108] The process of modulating the information to be transmitted using modulation parameter information to obtain a high-frequency modulated signal includes:

[0109] The lowest frequency f for obtaining power line information transmission L and the highest frequency f U ;

[0110] Based on each user's modulation factor and minimum frequency f L highest frequency f U and T s Construct the pulse solution model for each user;

[0111] The pulse solution model for each user is solved to obtain the modulation pulse waveform for each user;

[0112] By using the modulation pulse waveform of each user, the information sequence to be transmitted by each user is pulse-modulated to obtain the modulation signal of each user;

[0113] The modulation parameter information is subjected to OFDM modulation to obtain the modulation head signal;

[0114] A high-frequency modulated signal is constructed using the modulator head signal and the modulated signals of all users;

[0115] The process of constructing a high-frequency modulated signal using the modulator signal and the modulated signals of all users can be achieved by arranging the modulator signal and the modulated signals of all users in a serial order. In the serial arrangement, the modulator signal is in the first position, and the modulated signals of all users are sorted from front to back according to the user number.

[0116] The expression for the impulse solution model of the k-th user is:

[0117]

[0118] h(t) = 2f U sin c(2f U t)-2f L sin c(2f L t),

[0119] Where t is the time variable, τ is the time shift variable, h(t) is the intermediate function, sin c is the sigma function, δ(k) is the modulation factor of the k-th user, and p k (t) represents the modulation pulse waveform of the k-th user to be solved;

[0120] The modulation signal for the k-th user is:

[0121]

[0122] Among them, S (k) (t) represents the modulation signal of the k-th user, with a pulse width of T. s , A (k) This represents the amplitude of the k-th user. The modulation pulse energy for the k-th user, T represents the j-th element of the time-hopping sequence of the k-th user. c This represents the unit time shift of a time-skipping sequence. This represents the data modulation time shift of the j-th data to be transmitted by the k-th user. δi Let M be the i-th time shift, and M be the length of the information sequence to be transmitted.

[0123] The time-hopping sequence for each user is generated using a pseudo-random data generation method and is pre-stored in the information modulation module and information demodulation module before information transmission.

[0124] The process of performing user feature calculations on the transmission information sequence for each user to obtain the modulation pulse energy and modulation factor for each user includes:

[0125] Statistical processing is performed on the information sequence to be transmitted for each user to obtain a statistical information set for each user; the statistical information set includes the mean, variance, median, range, and frequency domain fluctuation value of the information sequence to be transmitted; the frequency domain fluctuation value is the square root of the variance of the first derivative of the FFT sequence of the information sequence to be transmitted divided by the variance of the information sequence to be transmitted.

[0126] The modulation pulse energy of each user is calculated by performing a set of statistical information on the statistical information set of each user.

[0127] A transmission matrix is ​​constructed by using the sequence of information to be transmitted for each user in the information to be transmitted as a row vector;

[0128] Factor calculations are performed on the transmission matrix to obtain the modulation factor for each user.

[0129] The expression for calculating the modulation pulse energy is:

[0130]

[0131] in, Let E0 be the modulation pulse energy of the k-th user, and E1 be the standard energy value. k a2 k a3 k a4 k a5 k These are the mean, variance, median, range, and frequency domain fluctuation of the k-th information sequence to be transmitted, respectively. T2() represents the second-order polynomial of the second-kind Chebyshev polynomial, and E0 is the preset energy standard value.

[0132] The expression for calculating the modulation pulse energy considers multiple characteristic parameters, such as the mean, variance, median, range, and frequency domain fluctuation, for each user's information sequence to be transmitted, thus achieving personalized modulation pulse energy allocation. Different users' information may have different characteristics; by comprehensively considering these characteristic parameters, appropriate modulation pulse energy can be allocated to each user, improving the quality and reliability of information transmission. For example, for users with large data fluctuations, the modulation pulse energy can be appropriately increased to ensure accurate information transmission.

[0133] The use of second-order polynomials of the second kind of Chebyshev polynomials enhances the robustness of modulation pulse energy calculation. Chebyshev polynomials possess excellent approximation and anti-interference capabilities, enabling accurate calculation of modulation pulse energy even in the presence of noise and interference. They can effectively handle characteristics such as frequency domain fluctuations, making the calculated modulation pulse energy results more stable and reliable.

[0134] The expression for the factor calculation is:

[0135]

[0136] Where δ(k) is the modulation factor of the k-th user, y kj Let y be the element in the k-th row and j-th column of the transfer matrix. j Let M be the variance of the j-th column of the transmission matrix, where M is the column dimension of the transmission matrix and also the length of the information sequence to be transmitted.

[0137] The modulation factor can adaptively adjust according to the specific characteristics of the information to be transmitted. When the elements of the transmission matrix change, the modulation factor also changes accordingly, allowing the modulation process to better adapt to changes in information. This adaptive adjustment mechanism can improve the flexibility and reliability of information transmission, ensuring efficient and accurate transmission in different information transmission scenarios.

[0138] A second aspect of this invention discloses a method for transmitting information over a wired network, implemented using the aforementioned information transmission device, comprising:

[0139] The information modulation module is used to modulate the information to be transmitted, converting it into a high-frequency modulated signal suitable for transmission on power lines; the information to be transmitted includes a sequence of information to be transmitted for each user;

[0140] The power line coupling module is used to couple high-frequency modulated signals onto the power line for transmission.

[0141] High-frequency modulated signals are transmitted using power lines;

[0142] The power line decoupling module is used to decouple the high-frequency modulation signal on the power line to the information demodulation module.

[0143] The information demodulation module is used to demodulate the decoupled high-frequency modulated signal and restore the information to be transmitted.

[0144] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. An information transmission device for a wired network, characterized in that, include: Information modulation module, power line coupling module, power line, power line decoupling module and information demodulation module; The information modulation module is used to modulate the information to be transmitted to obtain a high-frequency modulated signal, including: processing the modulation parameters of the information to be transmitted to obtain modulation parameter information; The information to be transmitted is modulated using modulation parameter information to obtain a high-frequency modulated signal; the information to be transmitted includes a sequence of information to be transmitted for each user; The power line coupling module connects the information modulation module and the power line, and is used to couple high-frequency modulation signals onto the power line for transmission. The power lines are used to transmit high-frequency modulated signals; The power line decoupling module connects the power line and the information demodulation module, and is used to decouple the high-frequency modulation signal on the power line to the information demodulation module. The information demodulation module is used to demodulate the decoupled high-frequency modulated signal and restore the information to be transmitted. The process of processing the modulation parameters of the information to be transmitted to obtain modulation parameter information includes: Obtain the sampling time interval T of the information to be transmitted; The frame duration T is calculated by combining the sampling time interval T and the information to be transmitted. f and time scaling factor θ; Based on frame time length T f The pulse duration T is calculated using the time scaling factor θ. s T s =T f / θ; For each user's information sequence to be transmitted, user characteristics are calculated to obtain the modulation pulse energy and modulation factor for each user. Using modulation factor, modulation pulse energy, and frame time length T f and pulse duration T s The modulation parameter information is then constructed. The frame duration T is calculated by combining the sampling time interval T and the information to be transmitted. f And the time scaling factor θ, including: A transmission matrix is ​​constructed by using the sequence of information to be transmitted for each user in the information to be transmitted as a row vector; The norm, trace, and rank of the transfer matrix are calculated. The variance of the mean of all row vectors of the transmission matrix is ​​statistically obtained; The frame time length T is obtained by calculating the sampling time interval T, norm value, trace value, and rank value. f ; The transmission matrix is ​​decomposed to obtain a left decomposition matrix, an eigenvalue matrix, and a right decomposition matrix; Extract the diagonal elements of the feature matrix to obtain the feature vector; Linear fitting is performed on the elements and element index values ​​of the feature vector to obtain an approximate polynomial; Using the mean of each row vector of the left decomposition matrix as the independent variable, the approximation polynomial is input to obtain the corresponding output vector; The ratio of the maximum absolute value to the minimum absolute value of all elements in the output vector is determined as the time scaling factor θ.

2. The information transmission device for a wired network as described in claim 1, characterized in that, The frame time length T f The calculation expression is: Where N is the row dimension of the transmission matrix, α, β, and γ are the norm, trace, and rank, respectively, ρ is the variance of the mean of all row vectors of the transmission matrix, and L2() represents the second-order Legendre function.

3. The information transmission device for a wired network as described in claim 1, characterized in that, The process of performing user feature calculations on the transmission information sequence for each user to obtain the modulation pulse energy and modulation factor for each user includes: Statistical processing is performed on the information sequence to be transmitted for each user to obtain a statistical information set for each user; the statistical information set includes the mean, variance, median, range, and frequency domain fluctuation value of the information sequence to be transmitted; the frequency domain fluctuation value is the square root of the variance of the first derivative of the FFT sequence of the information sequence to be transmitted divided by the variance of the information sequence to be transmitted. The modulation pulse energy of each user is calculated by performing a set of statistical information on the statistical information set of each user. A transmission matrix is ​​constructed by using the sequence of information to be transmitted for each user in the information to be transmitted as a row vector; Factor calculations are performed on the transmission matrix to obtain the modulation factor for each user.

4. The information transmission device for a wired network as described in claim 3, characterized in that, The expression for calculating the modulation pulse energy is: in, Let E0 be the modulation pulse energy of the k-th user, and E1 be the standard energy value. k a2 k a3 k a4 k a5 k These represent the mean, variance, median, range, and frequency domain fluctuation of the k-th information sequence to be transmitted, respectively. T2() represents the second-order polynomial of the second-kind Chebyshev polynomial, and E0 is the preset energy standard value.

5. The information transmission device for a wired network as described in claim 3, characterized in that, The expression for the factor calculation is: Where δ(k) is the modulation factor of the k-th user, y kj Let y be the element in the k-th row and j-th column of the transfer matrix. j Let M be the variance of the j-th column of the transmission matrix, where M is the column dimension of the transmission matrix and also the length of the information sequence to be transmitted.

6. The information transmission device for a wired network as described in claim 1, characterized in that, The process of modulating the information to be transmitted using modulation parameter information to obtain a high-frequency modulated signal includes: The lowest frequency f for obtaining power line information transmission L and the highest frequency f U ; Based on each user's modulation factor and minimum frequency f L highest frequency f U and T s Construct the pulse solution model for each user; The pulse solution model for each user is solved to obtain the modulation pulse waveform for each user; By using the modulation pulse waveform of each user, the information sequence to be transmitted by each user is pulse-modulated to obtain the modulation signal of each user; The modulation parameter information is subjected to OFDM modulation to obtain the modulation head signal; A high-frequency modulated signal is constructed using the modulator signal and the modulated signals of all users.

7. The information transmission device for a wired network as described in claim 6, characterized in that, The expression for the impulse solution model for the k-th user is: h(t)=2f U sin c(2f U t)-2f L sin c(2f L t), Where t is the time variable, τ is the time shift variable, h(t) is the intermediate function, sin c is the sigma function, δ(k) is the modulation factor of the k-th user, and p k (t) represents the modulation pulse waveform of the k-th user to be solved.

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