275 results about "Non orthogonal" patented technology

The invention discloses a method for realizing data communication by a multi-band adaptive antenna based on 5G communication. The method comprises the steps of dynamic sensing and multi-mode signal fusion, multi-band intelligent analysis, hybrid beam forming and dynamic reconstruction, cross-layer parameter joint tuning, real-time monitoring and self-learning compensation, multi-band adaptive switching and fault diagnosis and error calculation. The problems that in traditional 5G communication, the antenna frequency band is fixed, the beam adjusting capacity is limited, the anti-interference performance is poor, and the communication performance is unstable in a complex environment are solved. According to the method, the channel state is accurately evaluated and predicted through fusion of the extended Kalman filtering algorithm and the convolutional neural network, and frequency band resources are intelligently allocated and optimized through the deep Q network DQN and the non-orthogonal multiple access NOMA principle, so that omnibearing optimization and management of the antenna are realized, the communication efficiency and stability are improved, and the method is suitable for large-scale popularization and application. And the efficient and stable operation of the communication system in various complex environments is ensured.

The invention provides an AmBC-NOMA communication resource joint optimization method for a high mobility V2X scene, and relates to the technical field of communication resource joint optimization. Aiming at channel dynamic change caused by high-speed motion of a vehicle and the influence of the channel dynamic change on short packet communication reliability and rate performance, the method combines reflection type communication and non-orthogonal multiple access technologies, and on the basis of fully considering channel time-varying characteristics, a reflection coefficient, a power distribution coefficient and block length resource distribution in a system are jointly optimized, so that the reliability and the rate performance of short packet communication are improved. Therefore, the communication rate performance and the resource utilization efficiency under the requirements of short time delay and low error rate are improved. Through the method, the short packet transmission rate of the system can be remarkably improved under the conditions of limited time delay and channel uncertainty, and the actual application requirements of the future Internet of Vehicles system for efficient, low-time-delay and high-reliability short packet communication are met.

The invention provides an anti-interference sound signal data extraction method based on energy data perception, and belongs to the technical field of underwater sound signal processing, and the method comprises the steps: carrying out the A / D sampling and digital orthogonal demodulation of a received sound signal, and obtaining a baseband signal; performing low-pass filtering and downsampling on the baseband signal to obtain a preprocessed signal; performing matched filtering on the pre-processed signal by using a reference signal; the key improvement lies in that a local energy estimation function of a preprocessed signal is calculated, and normalization processing is carried out on a matched filtering result and the energy estimation function to obtain a normalized detection signal. The method effectively suppresses the shielding effect of a strong interference signal on a weak target signal under a non-orthogonal reference signal and a strong near-end and weak far-end scene, remarkably reduces the misrecognition probability, and improves the accuracy and reliability of the extraction of a long-distance and low-signal-to-noise-ratio target beacon signal in a complex underwater acoustic environment. The method is suitable for underwater navigation, positioning and communication systems.

The invention relates to an unmanned aerial vehicle cluster autonomous crossing method and system. The method comprises the following steps: expanding channel capacity, carrying out time delay analysis, and introducing a non-orthogonal multiple access technology to carry out interference management and resource allocation so as to complete network deployment; establishing a linear state space model of a multi-unmanned aerial vehicle system for the unmanned aerial vehicle cluster, setting a cooperative control strategy and an obstacle avoidance strategy, and performing model performance analysis; acquiring environment information through each sensor arranged on each unmanned aerial vehicle in the unmanned aerial vehicle cluster to obtain an environment state; an artificial potential field method is adopted to complete a dynamic obstacle avoidance algorithm according to environment state design, and the path of the unmanned aerial vehicle is adjusted in real time according to the dynamic obstacle avoidance algorithm; establishing an unmanned aerial vehicle kinematic model, designing an optimization algorithm of path planning based on the unmanned aerial vehicle kinematic model, and performing real-time dynamic path adjustment according to the optimization algorithm; setting a security and fault-tolerant mechanism; and autonomous crossing of the unmanned aerial vehicle cluster is realized. And the high-efficiency collaboration and stability of the unmanned aerial vehicle cluster are improved.

The invention discloses a broadband full-Stokes polarization imaging device based on non-orthogonal four-channel polarization beam splitting, which comprises a dielectric substrate, a non-orthogonal polarization beam splitting metasurface and a focal plane detection array, and is characterized in that the non-orthogonal polarization beam splitting metasurface is composed of a plurality of sub-wavelength unit structures; the sub-wavelength unit structure is a single-layer anisotropic medium nano-column array and is configured to perform intrinsic-loss-free non-orthogonal four-channel beam splitting on incident light and form four spatially separated focuses on the same focal plane, and polarization states corresponding to the four channels form a regular tetrahedron measurement base on a Poincare sphere; therefore, full Stokes parameter measurement is completed by four pixels; the sub-wavelength unit structure forms a super-pixel unit, and the super-pixel unit is aligned and integrated with a focal plane detection array in a two-dimensional array form to form a compact polarization camera facing focal plane segmentation. The device is simple in structure, easy to integrate with the CMOS front end, small in device size, low in power consumption and high in mass production feasibility.

The invention provides a Max plug-in assisted video data transmission method and system, and relates to the technical field of video transmission optimizing.The method comprises the steps that a monitoring video stream is analyzed through a Max plug-in, and video content information containing a plurality of semantic areas, associated position identifiers and importance parameters is obtained; generating multiple paths of coding code streams by using different coding strategies according to the importance parameters, and obtaining a composite code stream through bit field non-orthogonal multiplexing; transmission resources and coding parameters are dynamically adjusted in combination with real-time network states and importance parameters during transmission; and a receiving end decodes and recovers the video data through sequential interference elimination, and finally, the Max plug-in drives the digital twinning scene to realize differentiated three-dimensional rendering presentation according to the recovered data and the associated position identifier and importance parameter, so that efficient transmission of the monitoring video data and differentiated three-dimensional rendering presentation of the digital twinning scene can be realized.

The invention provides a novel hybrid carrier multiple access scheme. According to the scheme provided by the invention, the energy propagation concept of the hybrid carrier is combined with a frequency division multiple access model, and a specific operation method and a processing flow of the hybrid carrier processing and the multiple access processing of the power signal in the sending and receiving processes are provided; and the requirements of signal anti-interference capability, transmission efficiency and multi-user and multi-time-space under an ad hoc network of a power wireless private network are met, and the method is called as hybrid carrier non-orthogonal multiple access (HC-OFDMA). Due to the fact that the energy dispersion capacity is enhanced, a plurality of users can share the same spectrum resource at the same time through non-orthogonal distribution of a power domain, the spectrum utilization rate can be remarkably improved, power distribution can be dynamically adjusted, transmission is optimized according to channel conditions of the users, more users are supported to access at the same time, the system capacity is improved, and the system performance is improved. The method is especially suitable for high-density users and large-scale Internet of Things scenes.

A transmitter in a wireless communication network includes a bits-to-symbol mapper that produces a plurality of data symbols; and a waveform modulator that receives a first discrete-time waveform and at least a second discrete-time waveform that comprises a cyclic shift of the first discrete-time waveform; modulates a first one of the plurality of data symbols onto the first discrete-time waveform and modulates a second one of the plurality of second data symbol onto the second discrete-time waveform, to produce a plurality of modulated discrete-time waveforms; and sums the plurality of modulated discrete-time waveforms to produce a modulated discrete-time signal to be transmitted in the network. The first discrete-time waveform and at least the second discrete-time waveform are multicarrier signals.

The invention discloses a multi-node concurrent transmission signal superposition diversity method. The method comprises the following steps: S1, generating a Turbo coding sequence by adopting a Turbo encoder; s2, applying phase disturbance to each Turbo coding sequence; s3, performing non-orthogonal superposition in an air channel to form a complex baseband signal; s4, constructing an equivalent observation model; s5, modeling the sending symbol matrix into a sparse matrix to obtain a symbol estimation matrix; s6, inputting the symbol estimation matrix into a Turbo decoder, executing iterative decoding by adopting an improved Max-Log-MAP algorithm, and outputting a bit estimation sequence; s7, completing initial phase estimation by using a Zadoff-Chu lead code, and outputting an estimated phase sequence through a Kalman filter; and S8, dynamically updating the equivalent observation model based on the estimated phase sequence, and completing parallel computing and scheduling. According to the method, Turbo coding, sparse reconstruction and phase disturbance modeling are fused, and multi-node non-orthogonal concurrent transmission is achieved.

The invention discloses a three-channel homodyne interferometer signal processing device and method for suppressing non-orthogonal errors. The device comprises a single-frequency laser, a polarization splitting prism A, a 1 / 4 wave plate A, a first reflector, a 1 / 4 wave plate B, a second reflector and an interference signal resolving module. Wherein the polarization splitting prism A is located at the output end of the single-frequency laser; a 1 / 4 wave plate A and a first reflector are sequentially arranged in parallel in the direction of reflected light; and a 1 / 4 wave plate B and a second reflecting mirror are sequentially arranged in parallel in the transmission light direction. On the premise of repeatedly measuring the non-orthogonal angle, the non-orthogonal error of the interference signal is corrected in the analog operation process by electrically adjusting the amplitude of the interference signal.

The invention discloses a non-orthogonal polarization MIMO (Multiple Input Multiple Output) communication system, which belongs to the technical field of wireless communication and comprises a serial-parallel conversion and precoding module, a signal distribution network, a transmitting channel, a non-orthogonal transmitting array antenna, a non-orthogonal receiving array antenna, a receiving channel, a signal merging network and an MIMO signal detection module, a non-orthogonal transmitting antenna unit is arranged in the non-orthogonal transmitting array antenna, and a non-orthogonal receiving antenna unit is arranged in the non-orthogonal receiving array antenna. According to the invention, parallel transmission of multiple paths of signal streams can be realized under various channel conditions, and the transmission rate and the spectrum utilization rate of the system are improved.

The present disclosure relates to a method for transmission in a hardware impairment-based intelligent reflecting surface (IRS)-assisted non-orthogonal multiple access (NOMA) network, including: constructing an NOMA network system assisted by an IRS; constructing a base station transmission power minimization model based on a user quality of service (QoS) constraint, a successive interference cancellation (SIC) constraint, and a reflective phase shift constraint; solving the base station transmission power minimization model to obtain an optimal transmission scheme, and controlling the NOMA network system to transmit according to the optimal transmission scheme; the base station transmission power minimization model including an active beamforming vector optimization sub-problem and a passive beamforming vector optimization sub-problem.

The invention relates to the field of psychological health monitoring, and discloses a psychological health dynamic management system, which comprises a data acquisition module used for acquiring time, space and behavior multi-modal data of a user in real time; the tensor processing module is connected with the data acquisition module and is used for constructing the multi-modal data into a three-dimensional tensor and carrying out dimension reduction decomposition on the three-dimensional tensor; the quantum privacy module is connected with the tensor processing module and is used for performing quantization coding and privacy protection processing on the decomposed feature gradient; the federation aggregation module is connected with the quantum privacy module and is used for executing collaborative optimization of model parameters among distributed nodes; and the correction compensation module is bidirectionally connected with the tensor processing module and the federal aggregation module. The quantum privacy module realizes irreversible hidden transmission of gradient data, adopts a quantum state superposition coding and dynamic measurement basis selection mechanism, and ensures that the transmission process meets differential privacy constraints through non-orthogonal basis projection measurement and quantum noise injection.

The present disclosure provides a random access method. A method according to an embodiment of the present disclosure, performed by a terminal using an asynchronous grant-free non-orthogonal multiple access scheme, may comprise the steps of: acquiring random access preamble generation information from a base station; generating a primary random access preamble on the basis of the random access preamble generation information; and transmitting the generated primary random access preamble to the base station.

The invention belongs to the technical field of wireless communication, and particularly relates to a communication sensing integrated system based on non-orthogonal AFDM (Alternating Frequency Division Multiplexing). According to the system, a bandwidth compression factor is introduced into an AFDM framework to construct a non-orthogonal waveform, and controllable overlapping between chirp subcarriers is realized, so that the spectrum utilization rate is improved, and the robustness of the system under a high-speed dynamic channel is enhanced. And a receiving end realizes reliable information recovery through maximum likelihood detection, and processes echo signals in combination with a two-dimensional parameter estimation algorithm so as to realize high-precision sensing of the target distance and speed. The system has good anti-Doppler capability and perception precision performance, and is suitable for communication perception fusion application in a high-speed mobile scene.

The application discloses a kind of multi-dimensional multiple access and lightweight continuous authentication combined design system.The combined design system is based on non-orthogonal multiple access technology, explores multiple domains of device access, describes the access time sequence of multiple users, sub-channel and power allocation as a joint optimization problem, improves the communication performance of system while guaranteeing the continuous identity authentication of multiple devices.The system uses the unique access time sequence and channel generated by the user in advance to realize the simultaneous verification of multiple users at the base station end;While guaranteeing the continuous authentication of multiple users, the communication performance of the system is improved by optimizing their channel and power allocation.The system provides a fast network access and continuous authentication scheme for devices, which can be widely applied in wireless communication scenarios.

An apparatus serves a plurality of user equipments in a wireless communication system. For transmitting / receiving data of a plurality of user equipments, which include at least a first user equipment and a second user equipment, on resources shared by the plurality of user equipments, the apparatus transmits / receives a first data signal of the first user equipment and second data signal of the second user equipment using a non-orthogonal multiple access, NOMA, scheme. The first data signal and the second data signal are modulated using different waveforms prior to superposition of the first and second data signals.

The invention provides a wireless communication method and communication equipment. The method comprises: a first device sends a target signal to a second device on a target transmission resource, the target signal comprising a first signal and a second signal which are non-orthogonally transmitted. The embodiment of the invention provides a wireless communication method, in which non-orthogonal transmission can be performed between a first signal and a second signal on the same transmission resource (also known as a target transmission resource). Compared with a traditional signal transmission scheme in which the first signal and the second signal are transmitted in an orthogonal transmission manner by occupying different transmission resources, the utilization rate of the transmission resources can be improved.

An energy efficiency optimization method for multi-cell communication systems based on intelligent reflector-assisted rate division multiple access (RSMA) combines RSMA with intelligent reflector RIS. RIS intelligently regulates signal transmission links to enhance signal transmission quality, thereby improving signal quality for users at cell edges. RSMA effectively suppresses co-channel interference between users by flexibly controlling rate division strategies and beamforming. To this end, an optimization problem is constructed with the goal of maximizing system energy efficiency, jointly optimizing the beamforming vector, rate division multiple access matrix, and phase shift matrix on the base station side and the RIS side. To solve this non-convex optimization problem, an iterative solution is proposed for the beamforming, rate division, and phase shift optimization subproblems. Continuous convex optimization is used for the former, and semidefinite programming and penalty function methods are used for the latter. Compared with traditional space division multiple access and non-orthogonal frequency division multiple access, this method can achieve energy efficiency improvements of 28.5% and 10.2% for multi-cell communication systems, respectively.

The invention discloses an average information age optimization method based on AARIS mobile edge calculation, and the method comprises the steps: obtaining a deep hybrid strategy gradient DHPG algorithm, building a mobile edge calculation communication model, an information age model and a system energy consumption model based on an AARIS and non-orthogonal multiple access NOMA; a minimum system average information age objective function and constraint conditions are constructed, and the freshness and timeliness of information in the mobile edge computing communication system are improved. According to the method, by constructing a cooperative communication model of the AARIS and the NOMA, and combining with the DHPG algorithm, the trajectory and beamforming of the unmanned aerial vehicle are optimized, so that the AoI of the system is reduced, the data timeliness in real-time scenes such as automatic driving is effectively guaranteed, and the information freshness is remarkably improved.

The application discloses a lightweight deep receiver construction method and system, a receiver, equipment and a medium, wherein the construction method comprises the following steps: constructing a MU-MIMO OFDM uplink transmission system based on non-orthogonal superimposed pilot transmission to obtain an original training data set; constructing a lightweight deep receiver, wherein the lightweight deep receiver is based on time domain shift and frequency domain shift operations; and performing multiple iteration model training and convergence on the lightweight deep receiver by using the original training data set. By designing an uplink transmission system based on non-orthogonal superimposed pilot transmission to enhance the frequency spectrum usage rate, and then constructing a lightweight deep receiver based on time domain shift and frequency domain shift to perform model training, since the pilot structure is stable and the data symbols are random, the shift operation effectively enhances the separability of the two, so that the lightweight deep receiver can realize the decoupling of data and pilot in the non-orthogonal superimposed pilot scene, and the decoding accuracy of the data stream is significantly improved.

The invention relates to a communication method and device based on the non-orthogonal multiple access technology and communication equipment, and the method comprises the steps: obtaining the current channel state information of a plurality of user terminals in an NOMA system, and then dynamically distributing corresponding target power for each user terminal according to the current channel state information of the plurality of user terminals, and finally, determining a plurality of user signals according to the target power of each user terminal and the modulation signal until the data transmission rate of the NOMA system is greater than a preset rate threshold value, and respectively sending the plurality of user signals to the plurality of user terminals through user equipment in the NOMA system so as to indicate each user terminal to communicate based on the corresponding user signal. In the method, the power is dynamically allocated to each user terminal according to the real-time channel state information, so that each user terminal can communicate based on the optimal signal power while the transmission performance of the NOMA system is ensured, and the communication efficiency of the NOMA system is further improved.

In this wireless communication control method, in order to increase the efficiency of uplink communication, a base station, to which a plurality of wireless terminals are connected, transmits, to a wireless terminal belonging to a second group different from a first group among the plurality of wireless terminals, first information for performing uplink communication through repetition transmission using an orthogonal cover code, and the base station transmits, to a wireless terminal belonging to the first group among the plurality of wireless terminals, second information for performing uplink communication using non-orthogonal multiple access.

The invention provides a wireless communication method, system and device based on fusion of a bidirectional intelligent metasurface and non-orthogonal multiple access of a movable element. The method comprises the following steps: receiving a superposed signal sent by a base station; based on a preset constraint condition, calculating the historical channel state information through a preset operation optimization algorithm to generate a driving instruction; according to the driving instruction, driving each movable element to move to a target position; electromagnetic regulation and control are carried out on the received superposed signal to generate an electromagnetic regulation and control signal, and the electromagnetic regulation and control signal is transmitted to the user terminal; the user terminal converts and decodes the electromagnetic regulation and control signal to generate a user data stream; and enabling the user terminal to estimate the current channel state based on the current user data flow, and generating and outputting updated channel state information. According to the method, the layout form of the metasurface can be dynamically optimized, and higher anti-interference capability and better multi-user fairness are realized while the performance is ensured to approach global optimum.

The invention relates to the cross technical field of wireless communication and intelligent agriculture, in particular to a NOMA-SIC uplink weighting and rate maximization method based on an unmanned aerial vehicle (RIS), and the method comprises the steps: constructing an uplink system composed of a fusion center, an unmanned aerial vehicle reconfigurable intelligent surface and a sensor node, and enabling the fusion center to employ a continuous interference elimination technology, and realizing multi-user concurrent transmission based on power domain multiplexing of non-orthogonal multiple access. According to the method, fractional programming, quadratic transformation and successive convex approximation technologies are jointly used, phase configuration of the RIS and sensor transmitting power are alternately optimized, beam forming vectors are received by a fusion center, and under the condition that the power, phase and service quality constraint conditions are met, the system weighting sum rate is maximized. The advantages of NOMA spectrum multiplexing and SIC interference elimination are brought into full play, the transmission reliability and the spectrum efficiency are remarkably improved, and the method is suitable for low-delay and high-reliability acquisition of intelligent agricultural large-scale sensor data and can be expanded to the scenes of industrial Internet of Things, emergency communication and the like.

A system and method for combining and separating non-orthogonal signals. A transmitting component includes a set of generators of non-orthogonal signals and an adder for forming a group mixture. A receiving component includes a band-pass selective filter, an analog-to-digital converter and a calculator-solver for separating signals or channels. The system and method are designed to provide an almost ideal channels separation due to a new original group mixture processing procedure performed by the calculator-solver. The system and method provide significant increase in noise-immunity and the achievement of transmission rates that are exceeded the Shannon's Capacity of the group path.

The present application provides a method and apparatus for determining optimal communication parameters for a cooperative non-orthogonal multiple access system. The method comprises: calculating a target beamforming vector, a target relay power, and a target time allocation coefficient based on a first channel coefficient vector, a second channel coefficient vector, a third channel coefficient, a communication parameter constraint, a preliminary relay power, a preliminary time allocation coefficient, a first preliminary iteration step size, and a second preliminary iteration step size; when the number of iterations is less than a preset number, updating the preliminary relay power, the preliminary time allocation coefficient, the first preliminary iteration step size, and the second preliminary iteration step size, and recalculating the target beamforming vector, the target relay power, and the target time allocation coefficient; and when the number of iterations is greater than or equal to the preset number, outputting the target beamforming vector, the target relay power, and the output target time allocation coefficient. This method solves the problem of poor communication quality for long-distance users in cooperative orthogonal multiple access systems in the prior art.

A wireless communication method includes: transmitting, by a first device, first information to a second device. The first information is used for determining a first reception mode matching a first transmission mode; and the first transmission mode is used for non-orthogonal transmission of a first signal on a target transmission resource, and the first reception mode is used for receiving the first signal on the target transmission resource.