209results about How to "Improve spectral efficiency" patented technology

The invention relates to a 6G conduction signal fusion method, device and system for space-air-ground integration. The method comprises the following steps: generating a conduction fusion signal at a transmitting end; modulating the conduction fusion signal from a time delay-Doppler domain to a time delay-time domain, and performing parallel-serial conversion to obtain a time domain conduction fusion signal; quickly capturing a satellite at a receiving end; after a satellite is captured, a received time domain conduction fusion signal is converted and restored to obtain an accurately estimated fractional Doppler value and fractional time delay, a channel matrix is reconstructed, data demodulation is performed by using the channel matrix, and navigation message information of the captured satellite is obtained; doppler positioning is carried out by using the fractional Doppler value and satellite information to obtain coarse positioning estimation of a receiver; and according to the four groups of navigation message information and the four groups of pseudo-ranges, Doppler positioning correction values are calculated to correct coarse positioning estimation of the receiver, and 6G conduction signal fusion transmission is realized. The method can improve the signal spectrum efficiency and the satellite utilization rate.

The invention discloses an adaptive modulation mode method for a terminal radio station, which comprises the following steps: acquiring original signal data of a receiving antenna, extracting feature points through time-frequency transformation and energy spectrum analysis, and carrying out noise reduction processing to obtain preprocessed signal data; extracting frequency, amplitude and phase features from the preprocessed signal data to generate feature matrix data; fusing the feature matrix data with historical channel feature data to obtain channel feature data; interference feature analysis is carried out based on the channel feature data, and interference feature data and interference confidence data are obtained through probability statistical modeling; performing multi-objective optimization in combination with the modulation strategy data to generate modulation parameter data and reliability index data; and performing resource optimization allocation according to the network state data and the service priority data, and outputting resource allocation data and time slot allocation data. The adaptive capacity and the resource utilization efficiency of the communication system in a complex electromagnetic environment are improved.

The invention provides a communication perception integrated beamforming method and system for suppressing distance-angle side lobes, and the method comprises the steps: enabling a base station to communicate with a plurality of users under a digital beamforming ISAC architecture, and carrying out the detection of an air target in a self-transmitting and self-receiving mode at the same time; determining a sensing channel model and a communication channel model to obtain a communication receiving signal at each user position and a sensing receiving signal scattered back to the base station from the target; calculating to obtain the SINR of each user; a distance-angle-Doppler three-dimensional perception fuzzy function based on a digital beam forming ISAC architecture is obtained; extracting an expression of an integral sidelobe of a distance-angle dimension; according to the communication index, the sensing index and the integral sidelobe value in the preset distance-angle sidelobe area, a beam forming matrix of the ISAC system is designed in a joint optimization mode; auxiliary variables are introduced to convert the problem of optimizing the beam forming matrix into the problem of optimizing a covariance matrix of the beam forming matrix, and a feasible solution of the joint design problem is obtained.

The invention discloses a terahertz vortex phase plate based on a dumbbell-shaped metasurface. A plurality of metasurface units arranged on the same plane; the metasurface unit comprises a top basic unit metal structure layer, a middle dielectric layer and a substrate metal reflecting surface layer; the top basic unit metal structure layer is of a dumbbell-shaped structure, and the area is smaller than that of the middle dielectric layer and the base metal reflecting surface layer; the positions of all layers of the multiple metasurface units are correspondingly arranged, the phase distribution of the arranged multiple top layer basic unit metal structure layers on the plane meets the vortex beam phase distribution, and a metasurface array with the target topological charge is formed; the metasurface array is a terahertz wave incident plane. On the basis of improving the working efficiency, the metasurface technology and the geometric phase principle are combined, the whole-column arrangement of the terahertz vortex phase plate and the generation of terahertz vortex light beams with different topological charges are completed by designing a reflection type basic unit structure, and then the phase coverage corresponding to the specified topological charges is realized.

The invention discloses a rate division multiple access communication network total rate optimization method and system, and belongs to the technical field of communication. The method comprises the following steps: constructing a downlink rate segmentation multiple access communication system model based on an intelligent reflecting surface; the communication system model comprises a base station, an intelligent reflecting surface and a user side; grouping users in the user side, and constructing a hierarchical rate segmentation multiple access model based on user grouping; the hierarchical rate segmentation multiple access model comprises a corresponding relation between the user group and information flow generated by the base station; and according to the hierarchical rate segmentation multiple access model and the intelligent reflecting surface, assisting downlink communication between the base station and the user side. According to the method and the device, the layered rate division multiple access model is constructed by grouping the users, and the system performance is improved by combining the intelligent reflecting surface passive beam forming and the rate division multiple access active beam forming, so that the problems of spectrum resource shortage and signal interference can be solved, and the spectrum efficiency is greatly improved.

The invention discloses a 4G FDD stock terminal direct connection satellite-oriented time synchronization method, which comprises the following steps: firstly, a base station delays a starting point of a preamble sequence detection window and enlarges the window size, the base station receives a preamble sequence in the enlarged window and detects the size of time delay by decoding the preamble sequence, and after the base station determines the size of the time delay, the base station delays the starting point of the preamble sequence detection window; according to the method, time delay is divided into an integer part tau i and a decimal part tau f by taking milliseconds as a unit, terminals are divided into two types according to whether the decimal time delay is greater than 0.66 ms or not, so that an uplink frame structure of a base station is modified, the base station determines an uplink subframe scheduling strategy according to the uplink frame structure, the decimal part tau f of the time delay is used for determining a TA value, and the TA value is used for scheduling the uplink subframe. The integer part tau i is used for delaying receiving of uplink information, and the scheduling strategy is applied to subsequent receiving and transmitting of Msg3, downlink HARQ and other uplink information; the stock 4G terminal is directly connected with the satellite under the condition that only the base station side protocol is modified and the terminal side protocol is not changed, so that the 4G communication system supports larger time delay, and meanwhile, the upgrading cost of an operator and a user is reduced.

The invention provides a signal sending method, a signal receiving method, a communication device and a storage medium, relates to the technical field of wireless communication, and can improve the farthest sensing distance and avoid the requirement of hardware isolation. The method comprises the following steps: generating a communication and inductance integrated signal; the time domain resources of the sensing integrated signal sequentially comprise a first time domain resource, a second time domain resource and a third time domain resource; and sending the sensing integrated signal on the second time domain resource.

The invention discloses a millimeter wave large-scale MIMO (Multiple Input Multiple Output) hybrid precoding design method for URLLC (Uniform Resource Logical Link Control), which comprises the following steps: network side equipment adopts a hybrid precoding architecture, adopts a short packet to transmit a signal, measures the transmission performance according to a finite block length information theory; the method comprises the following steps: establishing a URLLC-oriented millimeter wave large-scale MIMO hybrid precoding optimization model based on performance measurement criteria such as maximization and rate or maximum and minimum fairness under multi-user communication business service requirements, transmission total power constraints and feasible phase set constraints of phase shifters with different resolutions; the reconstruction optimization problem enables the augmented Lagrange problem to have a decomposable structure, and the hybrid precoding optimization problem is solved through double iteration; the augmented Lagrange problem is rapidly solved in the inner layer iteration to update the original optimization variable, and the dual variable and the penalty factor are adaptively updated in the outer layer iteration. The system performance can be effectively improved, and the implementation cost and energy consumption of the system are reduced.

The invention provides a data transmission method and device and a storage medium, relates to the technical field of communication, and is used for supporting data transmission of various different waveform types. The method comprises the steps that a parameter set is selected from N parameter sets, the parameter set comprises a first indication and a second indication, the first indication is used for indicating an execution mode of first inverse Fourier transform, and the second indication is used for indicating an execution mode of second inverse Fourier transform; and performing data transmission based on the selected group of parameter sets.

The invention discloses a power line communication repeater arrangement method and device and a medium, and relates to the technical field of communication, and the method comprises the steps: building an uplink model and a downlink model based on a power line communication system model and a signal propagation model through employing a frequency division multiplexing technology, and then carrying out the verification through employing a cyclic redundancy check algorithm; when the verification result is that the relay node needs to be started, calculating current channel state data and inputting the current channel state data into a preset channel state prediction model to obtain channel state data at the next moment; performing initial power random allocation based on the channel state data at the next moment to obtain initial signal source power and multiple initial user power; the method comprises the following steps: constructing a constraint function by taking communication quality guarantee as a target, constructing an optimization target function by taking the minimum total power as a target, and then sequentially carrying out initial power optimization solution and relay node position optimization solution by adopting a heuristic algorithm to obtain the optimization position of each relay node. According to the invention, the relay deployment position is optimized, so that the power consumption is reduced while the communication quality is ensured.

The invention provides a communication and inductance integrated waveform generation, sensing and communication processing method and a communication system, and belongs to the technical field of radar detection. At least one communication sub-signal and at least one sensing sub-carrier are acquired; performing direct-current bias processing on each communication sub-signal, and coding each sensing sub-carrier based on the biased communication sub-signal to obtain a single-carrier flux-sensing integrated waveform; and performing frequency conversion processing on each single-carrier flux-inductance integrated waveform, and based on the single-carrier flux-inductance integrated waveforms subjected to frequency division multiplexing combination frequency conversion, overlapping the frequency spectrums of the adjacent single-carrier flux-inductance integrated waveforms to obtain a multi-subcarrier flux-inductance integrated waveform. Direct-current bias processing is carried out on communication sub-signals, unique phases of sensing sub-signals can be reserved, communication and sensing can share the same time-frequency resource and software and hardware equipment conveniently, high communication rate and high sensing precision are achieved, frequency domain resources can be effectively saved through frequency conversion processing and frequency spectrum overlapping of multiple sets of single-carrier-wave-flux-sensing integrated waveforms, and the communication efficiency is improved. And spectrum efficiency is improved.

The invention belongs to the technical field of wireless communication and terminals, and relates to a signal generation method and device and a communication system. The method comprises the following steps: carrying out DFT (Discrete Fourier Transform) pre-coding or LS (Least Squares) optimization on waveforms to be processed with different phases to obtain frequency domain signals corresponding to the waveforms to be processed; wherein the to-be-processed waveform is generated by processing a to-be-approximated binary keying signal OOK waveform generated based on a low-power wake-up LP-WUS signal; and obtaining a target frequency domain signal with the same frequency domain bandwidth as the LP-WUS signal based on the frequency domain signal. According to the method and the device, a plurality of to-be-processed waveforms with different phases can be generated according to the to-be-approximated OOK waveform corresponding to the LP-WUS signal, and frequency domain repeated mapping is performed on the to-be-processed waveforms with different phases, so that the frequency diversity gain of the LP-WUS signal is improved, the LP-WUS signal has relatively high anti-fading capability, and the detection rate and the detection accuracy of the LP-WUS signal are improved.

The invention relates to an unmanned aerial vehicle communication and sensing integrated trajectory and beam forming joint optimization method. According to the method, firstly, an unmanned aerial vehicle communication sensing environment is constructed, in the environment, an unmanned aerial vehicle sends superposed signals by using a non-orthogonal multiple access technology, then a bit rate model and a sensing power model are established, and a target function is constructed according to the bit rate model and the sensing power model; and finally, unmanned aerial vehicle flight parameter constraints are set, and under the constraints, the optimal solution of the target function is solved by adopting the improved particle swarm optimization. Compared with the prior art, the method has the advantages that weighted sum maximization of communication user throughput and effective target sensing power is achieved, the spectrum utilization rate is improved, the system application scene is expanded, and the accuracy of unmanned aerial vehicle communication and sensing integrated trajectory and beam forming joint optimization solution is improved.

The invention discloses a downlink spectrum efficiency and energy efficiency joint optimization method for a cellular-removed large-scale MIMO system, and the method mainly comprises the steps: obtaining an expression of downlink spectrum efficiency and energy efficiency of the system based on the cellular-removed large-scale MIMO system, and defining an expression of resource efficiency; according to the method, a resource efficiency maximization optimization problem is established, then a continuous convex approximation technology is utilized to convert an original problem into standard geometric programming, finally, an obtained geometric programming problem is solved based on golden search method iteration, and an optimal downlink transmission power distribution scheme is obtained. According to the invention, the downlink transmission power is optimized by using the channel statistical information, the spectrum efficiency and the energy efficiency of the decellular large-scale MIMO system are improved at the same time, the compromise between the spectrum efficiency and the energy efficiency is effectively realized, and the utilization rate of wireless resources in the decellular large-scale MIMO system is improved.

The invention relates to a high-bandwidth cluster control method and system based on a digital communication network, and the method comprises the following steps: carrying out the timestamp marking of real-time state data, and obtaining timestamp-marked state data; performing distributed state estimation on the timestamp marking state data to obtain cluster cooperation situation information; based on the cluster cooperation situation information, carrying out adaptive routing calculation on each device in the cluster to obtain a network resource scheduling strategy; performing channel multiplexing mapping on a preset digital communication network based on the network resource scheduling strategy through a preset space-time coding technology to obtain a channel multiplexing mapping matrix; and carrying out resource scheduling distribution and control on each device in the cluster based on the channel multiplexing mapping matrix to obtain a cluster control strategy, thereby solving the technical problem that the overall performance of the cluster is influenced because enough time precision cannot be provided when the large-scale data is processed in the prior art.

The invention discloses an incoherent chaos communication method and device based on deep learning, and relates to the field of data processing, and the method comprises the steps: obtaining a chaos receiving signal to be demodulated, carrying out the power spectrum density estimation, obtaining a PSD sequence, inputting the PSD sequence into a trained chaos receiving signal demodulation model, receiving the PSD sequence through an input layer, enabling the PSD sequence to pass through a first BiLSTM layer, and carrying out the demodulation of the chaos receiving signal through a second BiLSTM layer; a first time domain feature of the PSD sequence is extracted and then passes through a self-attention layer to obtain a first intermediate feature, the first intermediate feature passes through a first Dropout layer to obtain a second intermediate feature, the second intermediate feature passes through a second BiLSTM layer to extract a second time domain feature of the PSD sequence and then passes through a second Dropout layer to obtain a third intermediate feature; and inputting the third intermediate feature into a full connection layer and a Softmax layer for feature integration to obtain a probability distribution vector, and performing maximum likelihood judgment on the probability distribution vector through a classification layer to obtain an estimated binary information bit. The problem that an existing chaotic communication system is low in spectrum efficiency is solved.

The invention belongs to the technical field of channel allocation, and particularly relates to a full-duplex D2D (Device-to-Device) communication channel allocation algorithm based on novel graph coloring, which comprises the following steps of: constructing a bidirectional interference graph containing all potential interference links; expressing a channel allocation problem as an interference minimization graph coloring problem; distributing N independent communication channels for all cellular user equipment; a greedy graph coloring algorithm is adopted, and single colors are distributed to the D2D vertexes which are not colored one by one; if the number of D2D vertexes in a certain color set is increased or decreased, the interference level is evaluated again; and traversing each color, allocating a single color to the remaining D2D vertexes, terminating the algorithm after all D2D vertexes are traversed, and generating a conflict-free channel allocation scheme. According to the invention, the channel allocation can be optimized, and the interference in the system can be effectively managed and reduced, so that the access rate of the user and the overall spectrum efficiency are improved.

The invention discloses a flexibly configured time delay Doppler domain OTFS index modulation method, system and program product. The system comprises a transmitting end and a receiving end, wherein the transmitting end comprises an IQ mapping module capable of dynamically configuring grid activation ratio and modulation order. At a transmitting end, binary sequences of in-phase components and quadrature components are mapped respectively, the in-phase components and the quadrature components of sub-blocks are constructed, and sub-block level dynamic grid activation ratio and modulation order configuration are obtained. At a receiving end, an improved message passing detection algorithm is adopted to obtain an activated time delay Doppler domain grid position and a modulation symbol. According to the invention, through dynamic subcarrier activation and modulation order configuration, changing channel conditions and transmission requirements can be adapted; an information bit sequence is reasonably mapped into sub-blocks of in-phase and orthogonal components, so that effective information transmission under different configurations is ensured, and meanwhile, relatively low mapping complexity is maintained; the detection complexity is reduced by an improved messaging detector while maintaining good BER performance.

The invention discloses an OTFS-based high-reliability secure transmission method, which comprises the following steps of: sequentially carrying out LDPC (Low Density Parity Check) coding, QAM (Quadrature Amplitude Modulation) mapping, SVD (Singular Value Decomposition) pre-coding, inverse symplectic finite Fourier transform, Hisenberg transform, R-CP (Reverse-CP) addition, D / A (Digital-to-Analog) transform and up-conversion on an information source sequence of a transmitting end to obtain a transmitting sequence, and transmitting the transmitting sequence through a wireless channel; after a receiving end of a legal user obtains a receiving sequence, down-conversion, A / D conversion, R-CP removal, Wigner conversion, symplectic finite Fourier transform, SVD decoding, single-tap equalizer processing, QAM demapping and LDPC decoding are carried out to obtain an information sink sequence. Through a precoding technology based on an OTFS equivalent matrix and an error control coding technology based on LDPC, high-reliability physical layer secure transmission is realized in a high-dynamic communication scene, the total throughput and the spectrum efficiency of a system are improved, the peak-to-average power ratio and the transmission bit error rate of the system are reduced, and meanwhile, overhigh calculation complexity and time-frequency resource overhead are not brought.

The embodiment of the invention provides a wireless communication method, terminal equipment, network equipment and a computer readable storage medium, the terminal equipment indicates the type or capability set of the terminal equipment through two pieces of information at different stages, so that the network equipment can formulate different optimization schemes for transmission at different stages, and the spectrum efficiency is improved. The wireless communication method comprises the following steps: the terminal equipment indicates a first type of the terminal equipment through first information, and indicates a second type of the terminal equipment through second information; or, the terminal device indicates the first capability set of the terminal device through the first information, and indicates the second capability set of the terminal device through the second information; wherein the first information comprises a channel and / or a signal, and the second information comprises a channel and / or a signal.

The invention discloses a non-orthogonal multiple access system transmission method based on dual-frequency index modulation. According to the method, firstly, M-QAM modulation and dual-frequency index modulation of a specific system are respectively carried out on an input multi-user bit stream signal at a signal processing end of a base station, then OFDM-DFIM (Orthogonal Frequency Division Multiplexing-Distributed Frequency Index Modulation) modulation signals are generated by utilizing an orthogonal frequency division multiplexing technology, finally, channel conditions of all users are compared, power is allocated to all the users, and the signals are transferred to a time domain to be sent after superposition. Therefore, same-frequency simultaneous superposition transmission of signals of multiple users in a power domain is realized. And at a signal receiving end, performing signal separation by using a serial interference cancellation technology, and sequentially demodulating and restoring bit stream signals of each user through maximum likelihood estimation. According to the method, the spectrum efficiency is improved and the bit error rate is reduced by improving the proportion of the index information in all information, so that the system performance is further improved.

The invention provides a LoRa system and a LoRa physical layer enhancement method based on intelligent reflective surface beamforming and index modulation, in the system, a transmitting side at least comprises Nk LoRa nodes equipped with single transmitting antennas and an RIS with N passive reflective elements, the RIS is used for improving a wireless propagation environment, beamforming is realized by controlling the phase of each passive reflective element, and the LoRa physical layer enhancement method is used for enhancing the physical layer of the LoRa. The instantaneous signal-to-noise ratio under the antenna combination is activated to the maximum, and the bit error rate performance is improved; a receiver at least comprises a LoRa gateway equipped with NR receiving antennas, multiple receiving antennas at the LoRa gateway are used for index modulation, and Nk receiving antennas in the NR receiving antennas are activated in each symbol period and serve as information transmission entities to bear additional information, so that the transmission throughput is remarkably improved. According to the LoRa physical layer enhancement method applied to the LoRa system, the wireless propagation environment is controlled through RIS beam forming to improve the quality of received signals, and the spectrum efficiency is improved by ingeniously utilizing the IM principle of multiple receiving antenna indexes, so that the LoRa physical layer enhancement method has high transmission rate and high reliability.

The application discloses a four-dimensional 4nQAM constellation shaping method and system, and belongs to the technical field of constellation shaping. The method comprises the following steps: taking a coordinate origin as a square center, according to a preset constellation point priority, expanding a to-be-shaped constellation point in a concentric square from an inner layer to an outer layer in progression to obtain a two-dimensional geometric shaping constellation; mapping the two two-dimensional geometric shaping constellations to a four-dimensional space in a quadrature manner to generate a four-dimensional geometric shaping constellation; initializing and layering the four-dimensional geometric shaping constellation to obtain independent bit streams of layers of the constellation; inputting the independent bit streams into a distribution matcher of a corresponding layer to perform probability distribution matching, and obtaining a constellation symbol index sequence of the layer; layering and mapping the constellation symbol index sequence according to different Hamming weights, and performing quadrant fusion with the four-dimensional geometric shaping constellation to obtain a four-dimensional probability shaping constellation. The application not only realizes flexible construction of a 4n-order constellation, but also can adaptively adjust a constellation structure according to different application requirements.

The invention discloses a dynamically-graded satellite TBTP efficient broadcasting method and a satellite communication system, and the method comprises the steps: obtaining the dynamic forward signal-to-noise ratios of all online terminals in a current network at a transmitting side, and carrying out the dynamic grading, thereby obtaining a multi-stage parallel forward channel broadcasting TBTP sub-table; the scheduling time slot entries are classified into corresponding TBTP sub-tables according to the SNR of the terminal, the TBTP sub-tables are sent to a gateway according to an ascending sequence of the SNR, and the lowest SNR of the grade is carried in each sub-table to serve as a grading SNR identifier; the gateway regards the received sorted TBTP sub-tables as multiple paths of data streams with the same scheduling priority and incorporates the multiple paths of data streams into a TBTP broadcast priority queue; and carrying out physical frame assembly and modulation according to the TBTP broadcast priority queue, and sending the TBTP broadcast priority queue to a receiving side to parse the parsable TBTP signaling so as to restore the parsable TBTP signaling to obtain a complete resource allocation view for reverse transmission. According to the dynamic difference of the forward signal-to-noise ratios of the terminals, differentiated efficient broadcasting of the TBTP is realized, so that the overall utilization efficiency of forward link resources is remarkably improved on the premise of ensuring reliable reception of all the terminals.

The invention belongs to the field of wireless communication, and particularly relates to a wireless signal multi-dimensional array coding method and system based on dynamic rank optimization. The method comprises the following steps: detecting state information of a wireless channel, predicting state change of the channel by using a pre-trained deep learning model, and generating a dynamic optimization multiplier; adjusting a preset static optimization multiplier by using the dynamic optimization multiplier, constructing a target function for jointly optimizing the energy efficiency and the spectrum efficiency, and determining an optimal transmission rank by solving the target function; comparing the optimal transmission rank with the current transmission rank to determine a rank-up or rank-down operation; and reconstructing a transmission signal of the wireless channel according to a result of the rank increasing or decreasing operation. According to the method, the optimization target is dynamically adjusted by predicting the channel change, and the asymmetric ascending and descending rank algorithm is adopted, so that the adaptive transmission rank optimization in a complex time-varying channel environment is realized, and the communication performance is remarkably improved.

The invention relates to a communication control method and device, computer equipment, a readable storage medium and a program product, which are applied to a control unit, are arranged in a system in which a ground terminal and a low-altitude terminal coexist, and are used for dynamically combining a cellular unit and a cellular-free unit in the system. The control unit is in communication connection with all cellular base stations on a flight path of the low-altitude terminal; the method comprises the following steps: determining a target cellular base station meeting requirements from adjacent cellular base stations according to network performance index values of the adjacent cellular base stations located around a low-altitude terminal and sent by the low-altitude terminal; adjusting the type of the target cellular base station to a mixed base station comprising a cellular unit and a non-cellular unit; wherein the ground terminal is served by the cellular unit, the low-altitude terminal is served by the non-cellular unit, and wireless resources are dynamically shared between the cellular unit and the non-cellular unit in the hybrid base station. By adopting the method, the same-frequency interference when the ground network and the low-altitude network coexist can be reduced.

The present invention discloses a high spectral efficiency and low power consumption joint channel coding modulation optical communication method and system, and relates to the field of high-speed optical fiber communication technology. It includes a data acquisition step, a symbol multiplexing joint channel coding modulation step, a signal light transmission step, a channel equalization step, and a symbol demultiplexing step. The present invention aims to improve the problems of relative independence of forward error correction channel coding FEC and high-order modulation function modules in optical transmission, dependence on FEC long code length, limited spectrum efficiency improvement under the limitation of optical fiber nonlinear effects, and high FEC decoding delay and power consumption, which is beneficial to improving the spectrum efficiency and capacity of coherent optical transmission systems and optimizing system delay and power consumption.

The invention discloses a wireless sensor network conflict avoidance and service guarantee channel allocation method and system, and the method comprises the steps: predicting the electromagnetic interference intensity of each channel, and obtaining an electromagnetic interference intensity value; the method comprises the following steps: constructing a channel allocation model based on multi-agent reinforcement learning by taking a sink node as an agent, interacting with a wireless sensor network environment through the agent, and performing iterative training on the channel allocation model by adopting a composite reward function to obtain output channel allocation strategies under different electromagnetic interference intensities and different data transmission requirements; and the aggregation node distributes an optimal channel to the sensing node in real time based on a channel distribution strategy output by a channel distribution model according to a received data transmission request sent by the sensing node and in combination with an electromagnetic interference intensity value and a current channel distribution condition. According to the invention, wireless channel allocation in scenes such as wide-narrow band wireless hybrid networking and the like can be more effectively guaranteed, channel conflicts of the same system and different systems are reduced, the frequency efficiency is improved, and the maximum transmission delay of services is reduced.

The present invention discloses a distributed MIMO energy efficiency optimization method for joint subcarrier and power allocation under network slicing, comprising: establishing a downlink distributed MIMO system model; establishing an objective function and constraints for the energy efficiency problem of joint power and subcarrier allocation under eMBB and URLLC slicing; converting the original problem into a convex problem based on a large M method, integer relaxation, fractional programming, auxiliary variable approximation and convex difference programming method; the present invention can effectively improve the spectrum efficiency and energy efficiency of a distributed MIMO system under a network slicing architecture, meet the quality of service (QoS) requirements of different users, and has broad application prospects.

The embodiment of the invention provides an intelligent metasurface-assisted wireless multicast transmission method and system, and belongs to the technical field of mobile communication. The method comprises the following steps: acquiring user propagation demand information and user distribution information; determining a multicast transmission strategy according to the user propagation demand information and the user distribution information; determining a wireless transmission parameter according to the multicast transmission strategy; and obtaining intelligent metasurface-assisted wireless multicast transmission data according to the wireless transmission parameters. According to the method, the multicast transmission rate can be maximized, so that the spectrum efficiency and the multicast system capacity are improved, and the energy consumption is reduced.