32 results about "Symbol period" patented technology

The invention relates to the technical field of digital demodulation, in particular to a digital demodulation method suitable for deep ultraviolet light communication, which comprises the following steps of: adopting multiple delay processing with half code element width, and respectively carrying out double extraction processing on a discrete sampling signal which is not subjected to delay processing and a plurality of delay sampling signals to obtain a plurality of delay extraction signals; in this way, the key sampling time in the coverage code element period can be ensured, and a basis is provided for subsequent accurate synchronization; a plurality of delay extraction signals are respectively input into corresponding equalization processing units, a preset local training sequence is loaded to each equalization processing unit to obtain a plurality of equalization filtering signals, and the plurality of equalization filtering signals and the preset local training sequence are respectively subjected to related judgment processing, so that the inter-symbol interference is inhibited, and meanwhile, the equalization processing efficiency is improved. The synchronization signal can be quickly screened out, so that the problem that inter-symbol interference and synchronization are difficult to consider in a traditional demodulation method is solved, and the demodulation efficiency and reliability are remarkably improved.

Methods, systems, and devices for wireless communications are described. A forwarding device (e.g., a reconfigurable intelligent surface (RIS)) may transmit a capability message indicating one or more timing parameters associated with a time duration for the forwarding device to switch a set of forwarding elements from forwarding in a first direction to forwarding in a second direction. The forwarding device may receive, based on the indicated one or more timing parameters, one or more control messages that instructs the forwarding device to forward signal energy in the first direction during a first symbol period and to forward signal energy in the second direction during a second symbol period. The first symbol period may be different from the second symbol period. The forwarding device may include a primary array including a first set of forwarding elements and a secondary array including a second set of forwarding elements.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) and a base station may communicate using demodulation reference signal enhancements for control channel repetitions. The UE and the base station may identify a configuration to use to receive or transmit a set of repetitions of control information on a downlink control channel, each repetition of the set of repetitions including one or more symbol periods for an instance of the repeated control information. The base station may transmit, and the UE may receive, a first set of demodulation reference signals in accordance with a first set of parameter values, a second set of demodulation reference signals in accordance with a second set of parameter values, and instances of the control information during the set of repetitions. The UE may decode the control information based on the received signals and configuration.

This invention discloses a pre-equalization compensation method for a terminal in a TDD-OFDM direct conversion system with known transmitter IQI and nonlinear parameters. The method includes: the base station cyclically sending P different training sequences to the terminal; the terminal using a sliding window least squares-based channel state information tracking algorithm to track and estimate the channel state information, where δ is a threshold representing the correlation of the channel within adjacent symbol periods; and pre-equalization compensation performed directly at the terminal. Using the pre-equalization compensation algorithm, a modified data sequence can be obtained and sent to the base station. This invention considers three factors in wireless communication systems: I-path and Q-path imbalance caused by the non-ideal nature of analog components in RF transceivers, power amplifier nonlinearity, and multipath channels. It enables distributed processing within the cell, effectively reducing the demodulation burden on the base station and has wider applicability than traditional compensation methods.

The application discloses a decoding method, device and readable storage medium, and belongs to the technical field of communication. The method comprises the following steps: a decoding end determines a coding coefficient vector according to a received signal and a new space-time block code (NSTBC) codebook; the decoding end determines the power sum of the sending symbols on the sending antenna in the first two symbol periods according to the received signal; and the decoding end decodes original coding input symbols in a current symbol period according to the coding coefficient vector, a differential space-time block code (DSTBC) coding mode, the NSTBC codebook and the power sum of the sending symbols on the sending antenna in the first two symbol periods, wherein the first two symbol periods are two adjacent symbol periods before the current symbol period.

The invention discloses a multi-user detection method and device based on an expansion factor graph and a graph attention network, and the method comprises the steps: carrying out the multi-time oversampling of an asynchronous uplink signal of a receiving end, obtaining a plurality of sampling observations in each symbol period, and constructing the expansion factor graph based on the sampling observations; performing feature extraction on the oversampling receiving signal, and taking a real part and an imaginary part as deep neural network input to obtain node features; and a graph attention network is introduced into the expansion factor graph to carry out information interaction and model training, and a model obtained by training is utilized to judge signals received by each user, so that multi-user joint detection is realized. According to the method, the oversampling signal is modeled into the expansion factor graph structure, and the graph attention mechanism is introduced, so that effective detection of the multi-user signal in the asynchronous SCMA system is realized, and the problems of high multi-user detection complexity and insufficient asynchronous interference resistance in an uplink asynchronous SCMA scene are solved.

A method (200) for generating coded scattered SSB signal (108A) for enhanced initial access. The method (200) includes receiving, at a digitally controllable scatterer, DCS, device (104), a synchronization signal block, SSB, signal (108), transmitted from a base station, BS (110), of a wireless communications network. The method (200) further includes generating at least one coded scattered SSB signal (108A) by taking the received SSB signal at the DCS (104) as an input, the coded scattered SSB signal (108A) being scattered via a DCS generated beam, wherein a start of a DCS coding used to generate the coded scattered SSB signal (108A) at the DCS device (104) is a function of the time of arrival of the received SSB signal at the DCS (104), wherein a DCS code period of the DCS coding is a function of a symbol period of the received SSB signal at the DCS (104), wherein the SSB signal (108) and the coded scattered SSB signal (108A) are orthogonal or semi-orthogonal.

The invention discloses an information transmission method and device, communication equipment and a readable storage medium, and belongs to the technical field of communication. The information transmission method comprises the following steps: a first device performs chirp spread spectrum CSS modulation on bit information to be transmitted to obtain a CSS modulation signal; transmitting the CSS modulation signal; a CSS symbol in the CSS modulation signal satisfies at least one of the following items: representing different bit information through different starting frequency sweeping frequency points in the CSS symbol; the number n of bits carried by one CSS symbol and the number N of initial frequency sweeping frequency points or initial frequency sweeping frequency points used for modulation in the CSS symbol meet the following condition: 2n = N; the number N of initial frequency sweeping frequency points used for modulation in the CSS symbols meets the condition that N is smaller than or equal to M, and M represents the number of frequency points or the number of frequencies in a CSS frequency sweeping range or a CSS frequency sweeping bandwidth; for the CSS symbol with the initial frequency sweeping frequency point, the frequency sweeping frequency point or the frequency sweeping frequency in the symbol period of the CSS symbol and the frequency sweeping time meet at least one of the following items: a linear function relation and a nonlinear function relation.

Provided is a decoding method using polarization time block coding (PTBC) and a decoding device for performing the decoding method. The decoding method includes branching received symbols consecutively received according to a symbol period into two paths, delaying a first received symbol corresponding to a first path between the two paths by the symbol period in which the received symbols are received, performing a complex conjugate operation on a second received symbol corresponding to a second path between the two paths, compensating for channel distortion of the first received symbol delayed by the symbol period and the second received symbol on which the complex conjugate operation is performed, through an equalizer in the decoding device, and restoring a transmission symbol by performing phase restoration on the first received symbol and the second received symbol for which the channel distortion is compensated for, through a phase compensator in the decoding device.

This invention discloses a decoding method, apparatus, module, and computer-readable storage medium. The decoding method includes obtaining an initial symbol period and calculating a sampling interval based on the initial symbol period. It involves sampling the transition edges of the encoded data within the sampling interval, calculating the actual symbol period based on the sampling interval, updating the value of the sampling interval based on the actual symbol period, and continuing to sample the transition edges of the encoded data within the updated sampling interval. Finally, it involves decoding the encoded data based on the sampling results. The decoding method, apparatus, module, and computer-readable storage medium of this invention can dynamically adjust the sampling interval for each symbol. For Manchester encoding affected by noise, even when the period is inaccurate or the duty cycle is not 50%, it can still successfully identify symbols, improving the decoding success rate.

The invention discloses an infrared transmitting device and method, an infrared receiving device and an infrared communication system, and relates to the technical field of infrared communication. The infrared transmitting device comprises a first processor used for modulating to-be-transmitted information with a preset bit length to obtain N first digital signals and outputting the N first digital signals in a target symbol period in sequence according to a target sequence, the preset bit length is larger than 1 bit length, N is an integer larger than 1 and smaller than or equal to Nmax, and N is an integer larger than 1 and smaller than or equal to Nmax; the Nmax is determined according to the target symbol period; the first control circuit is used for outputting a first control signal according to the first digital signal; and the infrared transmitter is used for transmitting an infrared signal under the control of the first control signal. According to the infrared communication device, the information to be sent is converted into the N infrared signals sent in the target symbol period, so that information sending with the preset bit length can be realized, and the spectrum utilization rate and the data transmission rate of infrared communication are improved.

The invention provides a data encryption system and method based on microwave transmission, and relates to the technical field of data encryption methods, and the method comprises the steps: constructing a Lorenz chaos model through employing a single-variable time delay method, carrying out the iterative updating of a chaos variable value in the Lorenz chaos model through employing a fourth-order Runge-Kutta method, and simulating and generating an unpredictable continuous chaos trajectory; symbol periods of the chaotic trajectory are set, and a key stream corresponding to each symbol period is generated; and calculating the phase deviation of the current symbol period by adopting modular operation, calculating the frequency deviation of the current symbol period by adopting a dynamic frequency modulation method, and generating a microwave carrier signal. The key stream based on the Lorenz chaos model has initial value sensitivity and long-term unpredictability, and an independent dynamic key is generated in each symbol period, so that the global security is not influenced; through modular operation and dynamic frequency modulation, an encrypted signal has noise-like spectrum characteristics and time-varying characteristics.

Methods, systems, and devices for wireless communication at a remote user equipment (UE) are described. A remote UE may identify a quasi-colocation relationship between one or more control regions of resources during a time interval and a set of data regions of the resources during the time interval. In some examples, the set of data regions may include at least a first data region for a first relay UE and a second data region for a second relay UE. The remote UE may identify, according to the quasi-colocation relationship, one or more symbol periods for one or more automatic gain control measurements. The remote UE performs the one or more automatic gain control measurements on signals received in the one or more symbol periods and receive a first data message in the first data region and a second data message in the second data region.

The invention discloses a GFSK (Gaussian Frequency Shift Keying) signal bit synchronization method and device based on software radio, and relates to the technical field of wireless communication, the method comprises the following steps: sampling GFSK modulation signals at a plurality of sampling points in each code element period, carrying out differential demodulation on the GFSK modulation signals at each sampling point, and carrying out bit synchronization on the GFSK modulation signals at each sampling point; the method comprises the following steps of: extracting an accumulated phase parameter of a GFSK (Gaussian Frequency Shift Keying) modulation signal at a current sampling point, and then positioning a sampling moment corresponding to a sampling point with an optimal signal-to-noise ratio in a single code element period as an optimal sampling moment according to the accumulated phase parameters of the GFSK modulation signal at different sampling points in a plurality of code element periods, so as to complete bit synchronization. The method is simpler in structure, smaller in calculation complexity and calculation amount, less in hardware resource occupation, low in requirements for a multiplier and a memory, capable of reducing power consumption and suitable for being implemented on a software radio platform while the performance basically meets actual requirements.

The application provides a frequency offset estimation error correction method for UWB, which comprises the following steps: a receiver performs correlation operation on a preamble and a local template, sets an energy window, extracts a plurality of data in a first window as a first valid interval signal, and slides the window at intervals of a symbol period T_sym to extract a plurality of data in a second window as a second valid interval signal; conjugate multiplication is performed on sampling points at the same index positions of the first and second valid interval signals respectively, and the conjugate multiplication results in all intervals are accumulated to obtain an initial phase difference estimation value; according to a linear segmented CFO estimation and a correction error model, in combination with historical phase difference estimation data, a phase correction factor is introduced to correct the initial phase difference estimation value to obtain a corrected phase difference estimation value; the corrected phase difference estimation value is used to calculate a phase difference radian value by using an atan2 function; and the phase difference radian value is used as a phase rotation step to perform phase compensation on subsequent data.

This invention relates to the field of wireless communication technology, specifically disclosing a soft-decision method for GFSK signals based on multi-sampling point adaptive weighting. The method includes: extracting phase change features from the I / Q signal and performing three-level anti-interference processing to obtain an optimized phase difference sequence; performing frequency offset correction and symbol synchronization on the optimized phase difference sequence based on a predefined local ZC preamble sequence and a local gold code sequence in the frame structure; selecting three sampling points (middle, left, and right) from eight times the oversampling points in each symbol period; performing interference compensation on the data from the three sampling points and then weighting and fusing them to obtain a weighted fused sequence; constructing a reference sequence based on the local gold code sequence, and calculating the log-likelihood ratio between the reference sequence and the weighted fused sequence bit by bit as the soft decision value; and performing subsequent decoding based on the soft decision value. This invention can stably reduce the bit error rate and maximize the system coding gain in low signal-to-noise ratio and multipath interference scenarios.

The invention provides an embedded carrier phase recovery soft decision decoding method and system. The method comprises the following steps: calculating a symbol log-likelihood ratio and a soft symbol expectation according to a received signal; dynamically tracking time-varying phase noise by using Kalman filtering, and performing phase correction on a received signal based on soft symbol expectation; optimizing the log-likelihood ratio through the phase correction signal; using a Chase-2 decoder to generate extrinsic information, and using the extrinsic information to update the log-likelihood ratio and the soft symbol expectation so as to form closed loop iteration; and outputting a decoding result until a convergence condition is met. According to the method, the system robustness in a high-dynamic phase noise scene can be remarkably improved, and the bit error rate is reduced through collaborative optimization of phase recovery and decoding; and meanwhile, rapid convergence is realized with low complexity, high-order modulation and various FEC codes are compatible, and an existing coherent optical communication system can be adapted without increasing hardware cost.

The application discloses a kind of amplitude-phase difference modulation and demodulation method for MIMO system.The method is mapped in amplitude and the phase difference of adjacent symbol on source bit data at transmitting end, then according to known CSI information, SVD decomposition is carried out to channel matrix, and the optimal channel capacity power distribution is carried out using singular value matrix control signal amplitude, so that all effective channels in the same symbol period transmit the same symbol, finally, all transmitting symbols are obtained according to precoding scheme and transmitted through radio frequency chain.After synchronization is carried out to the received signal at receiving end, amplitude and phase difference value are obtained and phase wrap is demodulated, signal power of different receiving antennas is estimated, MRC is combined to amplitude and phase difference, and finally, source bit data is obtained by reflection mapping.The method combines the advantages of traditional DPSK modulation and ASK modulation, can flexibly adjust modulation index to adapt to different conditions, and the optimal energy efficiency can be obtained at transmitting end, and the complexity can also be reduced at receiving end.

The invention discloses a pulse modulation system and method based on a neural network, and the method comprises the steps: firstly processing an input symbol bit stream through a pulse position modulation module, extracting a position-related symbol bit through an MLP, converting the position-related symbol bit into a normalized current value, and transmitting the normalized current value into a pulse neural network; controlling the occurrence time of a pulse time domain and outputting a pulse position vector by utilizing a membrane potential accumulation characteristic and a time-varying discharge threshold value of linear decline in a symbol period; extracting phase correlation symbol bits through a pulse phase modulation module, distributing the phase correlation symbol bits to positive and negative parallel channels, adjusting the phase based on a pulse position vector, and generating a pulse vector with position and phase characteristics; and finally, expanding the discrete vector into a continuous time domain pulse signal by a transposed convolutional layer. According to the invention, the limitation of hardware adaptability and expansibility of a traditional pulse modulation system is overcome, and an efficient and flexible scheme compatible with various pulse modulation variants is provided for the field of Internet of Things and wireless communication.

Disclosed are a long-range radio communication method and device based on a spreading factor index, the method including: within one symbol period, dividing a plurality of information bits into index bits and modulated bits; mapping the index bits into a spreading factor sequence, and generating first chirp signals corresponding to various spreading factors (SFs); and converting the modulated bits to decimal numbers associated with the various SFs, modulating the decimal numbers into carrying signals, multiplying the carrying signals by the first chirp signals associated with the SFs to obtain second chirp signals associated with the various SFs, and superposing the second chirp signals to obtain a transmitted signal. According to the disclosure, by combining different SFs, an additional dimension is created to carry more information bits, so as to achieve the effect of increasing a data rate.

The application provides a low-orbit satellite spread spectrum orthogonal frequency division multiplexing frequency offset estimation method based on a carrier loop, and belongs to the technical fields of satellite communication and signal processing. The method comprises the following steps: a receiver divides an integral frame sequence into multiple accumulation blocks with the same structure in time sequence; phase rotation factors of residual carriers corresponding to each symbol period in a current accumulation block are calculated respectively; carrier stripping values and carrier correlation values of each subcarrier in each symbol period in the current accumulation block are calculated in turn respectively; accumulation correlation values corresponding to each subcarrier in the current accumulation block are calculated respectively; the carrier loop state of the current accumulation block is judged according to the index of the current accumulation block, and the carrier frequency control word of the next accumulation block is calculated; the processing of all accumulation blocks is iterated, and the average value of all carrier frequency control words obtained after the carrier loop converges is taken as the frequency offset estimation value of the integral frame sequence. The application can provide high-precision and continuous stable frequency observation values.

The invention provides an optical-electric hybrid ultra-low time delay communication method and system, and relates to the technical field of communication, and the method comprises the steps: outputting a global synchronous clock signal with clock jitter less than 1ppm, dynamically dividing micro time slot resources in an orthogonal frequency division multiplexing symbol period, and generating a dynamically adjusted micro time slot resource distribution result; calculating an optimal phase offset matrix of the metasurface intelligent reflecting surface through a depth deterministic strategy gradient algorithm to obtain an optimized electromagnetic wave propagation path; generating a global optimization check matrix by aggregating the locally trained lightweight error correction model gradient of each node to obtain a compensated data stream; and constructing a causal graph model dynamic pruning high-entropy path to minimize causal entropy, through multi-agent reinforcement learning, taking time delay-energy efficiency as a game target to decide an optimal modulation order and a subcarrier switching strategy, and obtaining an optimized stable communication link. According to the invention, high-reliability and low-delay communication basic support is provided for high-precision intelligent manufacturing.

The application provides a microwave transmission data encryption system and method, relates to the technical field of data encryption methods, and comprises the steps of constructing a Lorenz chaotic model by using a single-variable time delay method, iteratively updating chaotic variable values in the Lorenz chaotic model by using a fourth-order Runge-Kutta method, and simulating and generating unpredictable continuous chaotic trajectories; the symbol period of the chaotic trajectory is set, and the key stream corresponding to each symbol period is generated; the phase offset of the current symbol period is calculated by using a modulo operation, the frequency offset of the current symbol period is calculated by using a dynamic frequency modulation method, and a microwave carrier signal is generated. The key stream based on the Lorenz chaotic model has initial value sensitivity and long-term unpredictability, independent dynamic keys are generated in each symbol period, and the global security is not affected; through the modulo operation and the dynamic frequency modulation, the encrypted signal has both noise-like spectrum characteristics and time-varying characteristics.

The present application relates to the field of wireless communication, and especially relates to a low complexity concatenated modulation method for multi-mode symbol serial number modulation, a physical layer security transmission method and a computer readable storage medium. The low complexity concatenated modulation method for multi-mode symbol serial number modulation forms a concatenated multi-mode symbol serial number modulation mode. When processing an OFDM symbol period block, all frequency domain subcarriers are first divided into subblocks, each subblock is taken as a basic modulation unit, high-dimensional serial number modulation of one subblock is reduced to low-dimensional serial number modulation of two micro-subblocks in two-level concatenated serial number modulation, and the calculation complexity of modulation and demodulation at the transmitting and receiving ends is greatly reduced. Furthermore, in the physical layer security transmission, the dimension size of the first modulated micro-subblock is taken as a physical layer security transmission parameter, and dynamic change will make the same group of information bits get different output results after multi-level serial number modulation, reduce the cracking possibility, and realize the physical layer security transmission.

The invention relates to the technical field of information and communication, and particularly provides a sampling frequency offset compensation method, a processor, a system and a storage medium, and the method comprises the steps: obtaining a plurality of OFDM symbols in real time; determining a sampling frequency offset estimation value based on the plurality of pilot frequency subcarriers in each OFDM symbol; normalizing the sampling frequency offset estimation value into a first phase rotation correction value corresponding to a unit OFDM symbol period, and calculating a second phase rotation correction value corresponding to the current symbol period when the mth OFDM symbol period arrives, so as to superpose the second phase rotation correction value into a corresponding equalization phase factor, generating a total phase rotation correction factor for a single subcarrier in m OFDM symbol periods; and performing reverse phase rotation on the target subcarrier frequency domain signal based on the total phase rotation correction factor. According to the method and the device, the compensation amount of the receiving end of the OFDM system is accurately matched with the actually experienced frequency offset cumulant, so that effective compensation of the sampling frequency offset between the communication nodes is realized.

The application provides a data encoding method, a data decoding method, an electronic device and a medium, wherein the data encoding method is applied to a first terminal and includes: for each frequency point in a plurality of frequency points, constructing an orthogonal code word corresponding to data to be transmitted in a single symbol period based on a target matrix, wherein each data to be transmitted is transmitted by using the plurality of frequency points; combining the orthogonal code word in a plurality of symbol periods to obtain an extended dimension state matrix, wherein the extended dimension state matrix includes a plurality of orthogonal bases; encoding the data to be transmitted to obtain an information bit stream to be transmitted; establishing a corresponding relationship between the information bit stream and the orthogonal bases, and transmitting the information bit stream in a preset wireless channel based on the corresponding relationship. Through the extended dimension communication in the application, the spectrum utilization is higher and the anti-interference performance is better than that of the spectrum spreading communication scheme and the index modulation scheme in the prior art.

The invention discloses a self-adaptive identification method for a Bluetooth signal modulation mode, which comprises the following steps of: firstly, processing a received radio frequency signal, and detecting and extracting a burst signal from the radio frequency signal by means of energy detection and the like; estimating and compensating the carrier frequency offset of the signal based on the phase characteristic of the lead code part of the burst signal to obtain a corrected signal; first-level classification of low-power-consumption Bluetooth (BLE) and classic Bluetooth (BR / EDR) type signals is realized by analyzing modulation index related characteristics of the corrected signals; second-level fine classification of BLE 1M / 2M or BR / EDR is completed on the basis of symbol period or synchronization sequence correlation, so that a specific modulation mode is identified; and according to an identification result, automatically selecting a demodulation algorithm matched with the identification result to carry out data analysis. According to the invention, the automatic and accurate identification of the modulation mode and the adaptive selection of the demodulation algorithm are realized, and the automation level, efficiency and reliability of the Bluetooth test are obviously improved.

The invention discloses a phase coded signal key parameter estimation method under an FRI sampling condition, and the method comprises the steps: carrying out the preset frequency sampling processing of a received phase coded signal through an FRI sampling structure, and obtaining a discrete sequence; by taking the discrete sequence as input, calculating a carrier frequency estimated value of a phase-coded signal through wavelet transform and gradient descent search; on the basis of the carrier frequency estimation value, calculating a symbol period estimation value of the phase-coded signal for the discrete sequence through wavelet transform and spectrum refinement analysis; and based on the discrete sequence, the carrier frequency estimation value and the symbol period estimation value, through annihilation filtering and box differential filtering, calculating a delay amount estimation value of the phase-coded signal. According to the method, through fusion of an FRI sampling structure, wavelet transform, gradient descent and spectrum refinement, the requirements of the system for the sampling rate and hardware resources are reduced, the calculation complexity is effectively controlled, and the estimation precision and robustness are improved.

The present application relates to low-orbit satellite communication technical field, provide a kind of symbol polarity search method based on cross entropy optimization, comprising: initialization symbol polarity probability distribution, according to symbol period is divided into K symbols to receive signal matrix, determine the correlation result matrix of receive signal matrix and local code word.Based on current symbol polarity probability distribution, randomly generate candidate symbol sequence, calculate the fitness of each candidate symbol sequence and correlation result matrix.Select the fitness of the first second number of candidate symbol sequence to form target set.According to target set, optimize symbol polarity probability distribution by cross entropy until meeting convergence condition, output symbol polarity estimation result.According to the correlation peak position and amplitude of the highest fitness, determine code phase and carrier phase respectively.Through cross entropy, symbol polarity search can not only obtain symbol polarity information, but also estimate code phase and carrier phase.

The invention discloses an industrial field bus communication method and system based on two-dimensional pulse modulation, and belongs to the technical field of industrial automation communication. The method comprises the following steps of: defining to divide a symbol period into a preamble and a data sub-time slot; the preamble time slot sends a first pulse with a fixed width; the data sub-slot sends a second pulse selected from a plurality of predefined width levels to characterize a multi-bit binary symbol; a communication frame containing a mode indicator is constructed, and the indicator is encoded by at least one symbol and used for indicating a subsequent data segment to adopt traditional one-dimensional modulation or two-dimensional modulation of the invention; and the master device schedules communication with the new and old slave devices accordingly. The system comprises a master device and a slave device. According to the invention, by fusing two dimension bearing information of pulse position and width in a single symbol, the efficiency of a physical layer is multiplied, and meanwhile, lossless compatibility with stock traditional pulse bus equipment and smooth network upgrading are realized through a dynamic frame and hybrid scheduling mechanism.