81results about How to "Improve spectrum utilization" patented technology

The invention provides a time division duplex multi-carrier synchronous transmission method based on 5G, which is used for solving the problems of inflexible carrier time slot allocation and inaccurate time delay compensation in synchronous transmission. By dynamically adjusting time slot allocation and working frequency bands of carriers in a network control center, the method optimizes network loads and reduces cross interference; the time delay of each carrier is compensated in real time by adopting a synchronous signal calibration algorithm, so that strict alignment of transmission time slots is ensured; the transmitting end dynamically adjusts the transmitting power according to link state information, and the receiving end reduces interference and signal attenuation through a multi-carrier cooperative interference management and multi-path delay compensation mechanism; and a receiving end performs joint decoding based on channel estimation and integrates demodulation signals of all carriers, so that the transmission efficiency and the signal quality of the 5G network are improved. The method is suitable for a base station system and a base station and repeater extension coverage system, and is especially suitable for a distributed wireless system including an optical fiber remote distributed system, a cable remote frequency shift repeater system and the like.

The invention discloses a broadband wide frequency spectrum analysis method and system based on deep learning. The method comprises the steps of spectrum signal acquisition, spectrum preprocessing, abnormal interference detection, spectrum trend prediction and spectrum scheduling management. The invention relates to the technical field of wide-frequency spectrum analysis, in particular to a broadband wide-frequency spectrum analysis method and system based on deep learning, which adopts a three-step method of abnormal interference detection, spectrum trend prediction and spectrum scheduling management, and adopts a layer-by-layer progressive deep learning and reinforcement learning technology. The real-time detection of spectrum abnormity, the accurate prediction of future trend and the optimal allocation of dynamic resources can be realized; carrying out abnormal interference detection by adopting a joint improvement multi-classification support vector machine method combined with feature enhancement; performing spectrum trend prediction by adopting a time sequence integrated network combined with one-dimensional convolution feature extraction; and performing spectrum scheduling management by adopting a reinforcement learning method enhanced by a near-end strategy optimization algorithm.

The invention discloses a base station joint multi-band resource allocation method and device, a medium and a product. The method comprises the following steps: acquiring spectrum state data of each band; determining demand data of user communication according to the acquired user communication data; and performing global optimization by adopting a preset optimization model according to the spectrum state data and the demand data, and determining a frequency band resource allocation strategy. The scheme of the invention can improve the spectrum utilization rate, improve the network throughput and ensure the service quality.

The invention relates to the technical field of radio frequency communication control, and discloses a beam forming accurate control method, which comprises the following steps of: acquiring a business service quality parameter and frequency domain channel information of a user; generating a user priority sequence; constructing a three-dimensional resource scheduling matrix; outputting a beam forming coefficient matrix and a power distribution result; and performing beam precise closed-loop regulation and control of the radio frequency array. The technical problems in the prior art that real-time resource scheduling and fine beam regulation and control are difficult to carry out in combination with user QoS dynamic changes, and stable beam forming control is difficult to realize especially in a scene that a chip supporting large-scale user concurrency needs to dynamically adjust beams according to QoS requirements are solved. According to the invention, the dynamic resource scheduling matrix fused with power perception is constructed, and a multi-dimensional feedback calibration mechanism based on amplitude-phase perturbation is combined, so that high-precision beam control is realized, and the communication stability and the regulation and control flexibility are improved.

The invention relates to the technical field of networking methods, in particular to an ad hoc network dynamic networking method and system based on an MAC layer, and the method comprises the steps: obtaining the topological relation information of each node in a network; obtaining distance information between the nodes; generating a topology sensing matrix based on the topological relation information; calculating a priority matrix according to the topology sensing matrix; evaluating the service capability of each node based on the priority matrix and the distance information; calculating the reliability of each node according to the service capability; based on the reliability, time slots are distributed for all the nodes; generating a routing optimization matrix according to the priority matrix, the reliability and the distance information; the priority, the service capability, the reliability, the time slot allocation result and the routing optimization information of each node are output, and by introducing an innovative priority matrix calculation method, the direct connection relationship of the nodes is considered, and the positions and the influence of the nodes in the whole network are captured, so that the network resource allocation is more reasonable, and the routing optimization efficiency is improved. And the overall throughput of the network is obviously improved.

The invention relates to a self-adaptive CKF phase noise compensation method in a coherent light OFDM system. The method comprises the following steps of: estimating a phase noise value of each OFDM symbol at a signal receiving end through known pilot frequency information, performing first phase noise fitting by using a second-order Hermite interpolation function, performing pre-judgment and secondary symbol partitioning on a compensated signal, performing second phase noise fitting by using an updated second-order Hermite interpolation function, and performing phase noise fitting on the compensated signal. And finally, the residual phase noise is suppressed by using the characteristics that the adaptive CKF can adaptively update the process noise and reduce the estimation error. Simulation results show that the method can effectively compensate CPE and ICI phase noise, meanwhile, the tolerance of the CO-OFDM system to the laser line width is also improved, and the performance of the system is improved.

The invention relates to the technical field of communication, and particularly discloses an ad hoc network communication method, device and equipment and a storage medium, and the ad hoc network communication method comprises the steps: obtaining spectrum sensing information; performing dynamic spectrum resource allocation on each communication node in the ad hoc network based on the spectrum sensing information; performing multi-channel joint scheduling according to the dynamic spectrum resource allocation result; constructing an alternative path according to a multi-channel joint scheduling result and performing path quality evaluation; and performing segmentation and multi-path parallel transmission on a to-be-transmitted data packet based on a path quality evaluation result. According to the ad hoc network communication method provided by the embodiment of the invention, the idle and tension of the spectrum is avoided through the dynamic spectrum resource allocation basis real-time sensing information, the spectrum utilization rate is remarkably improved, and the problem of unbalanced spectrum resource allocation in the prior art is solved; and multi-channel joint scheduling is based on a distribution result, so that resource configuration can be optimized, efficient communication of each node is ensured, and the overall spectrum use efficiency is further improved.

The invention discloses an encryption communication method and system based on biological genetic coding chaos driving, and the method comprises the steps: receiving an original bit stream and an initial secret key, and generating a chaos sequence group according to the initial secret key through two hyperchaos models; performing DNA coding encryption on the original bit stream by using the chaos sequence to obtain a gene transmission sequence, and performing DNA decoding on the gene transmission sequence to obtain a transmission bit stream; performing constellation mapping on the transmission bit stream to obtain a constellation diagram, and performing subcarrier scrambling, symbol scrambling and constellation rotation on the constellation diagram according to the chaos sequence; performing OCDM modulation on the constellation diagram through an inverse discrete Fresnel transformation matrix to obtain a transmission signal; hiding the initial key in a frame header of a transmission signal, and sending the transmission signal to a receiver through a transmitter; according to the invention, multi-layer encryption of the OCDM signal and dynamic secret key follow-up transmission are realized.

The invention discloses a two-way communication transmission method based on full-duplex communication, which realizes efficient self-interference elimination in an analog domain and a digital domain by deploying antenna arrays at a transmitting end and a receiving end and combining a self-adaptive beam forming technology and a self-adaptive filter, and realizes synchronous two-way transmission by adopting an orthogonal frequency division multiplexing technology. The spectrum utilization rate and the communication quality are improved by detecting available channels and optimal channel allocation in real time, the weight value is intelligently calculated, the resource allocation is optimized and the priority transmission of key data is ensured according to the importance, the delay sensitivity and the network state of the data packet; a fuzzy control algorithm is used for evaluating the signal-to-noise ratio and the bit error rate of a communication signal in real time, the transmitting power and channel selection are dynamically adjusted according to an evaluation result, adaptive optimization of communication parameters is achieved, and the defects of an existing full-duplex communication system in the aspects of self-interference elimination, channel allocation, data scheduling and communication parameter optimization are effectively overcome.

The invention discloses a frequency multiplexing implementation method of a ground-air broadband communication system, which comprises the following steps: setting a plurality of multiplexing frequencies for aggregating downlink subcarriers for the ground-air broadband communication system, the plurality of multiplexing frequencies multiplexing the frequency of a ground operator system; arranging a ground-air system base station which is spatially isolated from a ground same-frequency network base station of the ground operator system for the ground-air broadband communication system along an air route according to the plurality of multiplexing frequencies; according to the coverage condition of a plurality of multiplexing frequencies in the ground operator system, selecting an actual multiplexing frequency for the laid ground-air system base station from the plurality of multiplexing frequencies; and realizing ground-to-air communication of the ground-to-air broadband communication system by using the actual multiplexing frequency of the ground-to-air system base station. According to the frequency multiplexing technology, the inter-system co-frequency interference caused by frequency multiplexing can be reduced, and the design complexity and the construction cost are low.

The application provides an AM-PM distortion calibration method applied to an UWB transmitter and belongs to the field of UWB communication. The method adds a sampling resistor between a linear voltage stabilizing power supply LDO and a digital power amplifier DPA driving stage of the UWB transmitter using a digital power amplifier, so as to simulate the instantaneous change of the power supply voltage of the DPA driving stage when the UWB pulse is transmitted; an adjustable delay unit is added between a carrier input port LO and the DPA driving stage; the continuous sine wave is transmitted, the phase information under each digital baseband amplitude control word is collected to form original data of the AM-PM distortion of the UWB transmitter, the digital baseband output AM-PM control word is used to control the adjustable delay unit to output the phase which is opposite to the original data and has the same size, so that the phase predistortion of the transmitted UWB pulse is realized, and the AM-PM distortion calibration is completed. The application has the advantages of simple implementation and strong compensation capacity.

The application belongs to the technical field of radar signal processing and imaging, and provides a differential coupling single-frequency time-varying low-quantization imaging method, which comprises receiving a SAR echo signal, constructing a single-frequency time-varying threshold signal, single-bit quantization processing of a reference channel, single-bit quantization processing of a phase shift channel, double-channel data fusion and harmonic cancellation, and imaging processing based on a synthesized signal. The application effectively reduces the quantization noise base and improves the detection capability of a SAR system on weak targets under the premise of not significantly increasing the hardware cost.

This invention discloses an HPAM-DMT-NOMA method based on time-domain preprocessing, comprising: At the transmitting end, PAM modulation is performed on the input user transmission bits to generate PAM symbols; after power superposition, serial-to-parallel conversion, and Hermitian symmetry, the symbols are allocated to two signal components for HPAM-DMT transmission; the frequency domain signals of PAM-DMT and RPAM-DMT are calculated; an IFFT operation is performed to obtain the time domain signal; the time-domain preprocessed signal is calculated; the RPAM-DMT time domain signal is calculated and superimposed on the clipped PAM-DMT signal for synchronous transmission to obtain a mixed signal; a reconstructed signal is introduced, processed, and input to drive an LED for illumination; at the receiving end, the received signal is processed to generate a frequency domain signal, and finally, the multi-user signal is recovered. This scheme eliminates clipping noise interference between the mixed signal components, avoids error propagation problems, and achieves high spectral efficiency and power efficiency.

The present invention discloses a communication optimization method of joint beamforming and channel allocation, comprising: allocating channels between a controller and a user based on an ultra-reliable low-latency communication system model; completing data transmission between the controller and the channel based on the allocated channels; constructing a decoding error rate model based on the user's received signal, and constructing an optimization model with an optimal beamforming vector that minimizes the decoding error rate as the optimization target; introducing auxiliary variables, and converting the optimization model into a convex problem model through continuous convex approximation; iteratively solving the convex problem model based on an interior point method to obtain an optimal beamforming vector matrix; converting the optimal beamforming vector matrix into an optimal beamforming vector between the controller and the user through singular value decomposition; completing the beamforming of the ultra-reliable low-latency communication system model based on the optimal beamforming vector; and allocating channels between the controller and the user again. The present invention can effectively improve communication stability.

Embodiments of the present disclosure relate to the technical field of mobile communications, and provide a communication method and apparatus, an electronic device and a storage medium. The communication method is applied to a station device that supports multiple connections, and the method comprises: sending a first radio frame, wherein the first radio frame comprises a TID-to-Link mapping information element between a communication identifier and a target communication connection, and the target communication connection is a newly added and / or deleted communication connection. The embodiments of the present disclosure provide a means for implementing a TID-to-Link mapping mechanism in a multi-connection scenario.

Provided in the present application are a synchronization signal block (SSB) sending method, network device and apparatus, the method being applied to the network device, the network device comprising a plurality of cells, the method comprising: segmenting a first frequency domain resource to obtain a plurality of sub-frequency domain resources under the first frequency domain resource, the first frequency domain resource being a frequency domain resource for sending an SSB, the plurality of sub-frequency domain resources are not overlapped with each other; in the plurality of sub-frequency domain resources, respectively determining sub-frequency domain resources, which are respectively used for sending the SSB, of the plurality of cells, the sub-frequency domain resources, which are respectively used for sending the SSB, of the plurality of cells are different; and respectively sending the SSBs to the terminals in the plurality of cells based on the sub-frequency domain resources, used for sending the SSBs, of the plurality of cells. According to the scheme, the spectrum utilization rate can be improved.

The present disclosure provides a communication method and apparatus. The communication method may comprise: determining a first message frame, the first message frame comprising information for identifying a capability of supporting the sending and / or receiving of an aggregate physical layer protocol data unit (A-PPDU); and sending the first message frame. The technical solution provided by embodiments of the present disclosure can improve a spectrum utilization ratio.

This invention provides a UAV power emergency communication and resource collaborative scheduling system, relating to the field of wireless communication technology. Through system initialization, data acquisition and hierarchical coding, satellite-to-ground link establishment, NOMA access and scheduling modeling, resource collaborative configuration model establishment, joint optimization solution, online collaborative execution, and anomaly response, it achieves dynamic resource scheduling and optimization, offering advantages such as efficient collaborative resource scheduling, improved spectrum utilization, optimized energy use, guaranteed access to key nodes, and enhanced system reliability and response speed.

The embodiment of the present invention discloses a small hybrid mode filter with two resonant cavities, belonging to the field of communication technology. The filter comprises: n resonant cavities connected in series, and a metal sheet is spaced between each two adjacent resonant cavities, n≥3; the first and last resonant cavities of the n resonant cavities are metal resonant cavities, and the remaining n‑2 resonant cavities are dielectric dual-mode resonant cavities; the n resonant cavities are coupled through the coupling window on the metal sheet. The filter provided by the embodiment of the present invention has the characteristics of compact size, low loss, large power capacity, high out-of-band suppression, and good harmonic performance, so as to effectively improve the anti-interference ability and spectrum utilization of the 5G communication system, reduce the power consumption of the 5G communication system, and improve the coverage of the 5G communication system.

The application discloses a laser microwave hybrid communication adaptive modulation method based on machine learning, comprising: acquiring a weather data set, and establishing a channel state set according to weather data in the weather data set; training a random forest model RFM by using the weather data set and the channel state set, and obtaining the trained random forest model RFM; acquiring real-time weather data, inputting the weather data into the trained random forest model RFM, and obtaining a current optimal channel state D i ; judging whether an average error rate P i under the current channel state D e is less than a target error rate P e,obj , if not, adjusting the random forest model RFM until the current average error rate P e is less than the target error rate P e,obj , and simultaneously judging whether the currently executed channel state is consistent with the optimal channel state, if not, executing channel state switching, and completing switching of the laser microwave hybrid link. The influence of bad weather on the channel is reduced, and the communication efficiency is improved.

The invention provides a radio access network intelligent controller (RIC), a dynamic resource block (RB) configuration method and a base station for dynamically configuring resource blocks. A plurality of base stations (BSs) continuously receive network state information from a plurality of associated UEs and transmit the network state information to the RIC. The RIC obtains network state information corresponding to a plurality of user equipments (UEs) from the plurality of BSs; the RIC identifies at least one interfered first UE in the plurality of UEs based on the network state information; the RIC sets a plurality of dynamic RB allocation strategies corresponding to the plurality of BSs based on the network state information, the at least one first UE and the at least one first BS; in response to receiving a dynamic RB allocation policy from an RIC, a plurality of BSs divide a plurality of dominant RBs into a plurality of first RB groups and a second RB group, thereby generating transmission resource allocation information corresponding to a plurality of UEs, so that the plurality of UEs identify respective plurality of allocated RBs.

This invention discloses a method and system for low-Earth orbit (LEO) satellite communication based on dual-frequency dual-circular polarization beam scanning, relating to the field of LEO satellite communication technology. The method includes the following steps: a dual-frequency dual-circular polarization antenna unit performs identity matching verification based on satellite beacon signals transmitted by the LEO satellite to establish a communication connection with it; once the communication connection is established, the antenna unit adjusts and switches to the corresponding communication frequency based on satellite communication frequency band parameters, and simultaneously receives downlink data and transmits uplink data using dual-circular polarization mode; during data transmission, a feed phase control signal is generated based on satellite orbit parameters to adjust the beam pointing direction in real time; when the LEO satellite is about to pass over, the satellite beacon signal of the next LEO satellite is acquired to establish a communication connection and transmit data, thereby achieving seamless communication switching; through dynamic scanning and seamless switching of the dual-frequency dual-circular polarization beam, communication stability and data transmission efficiency are effectively improved.

The invention relates to the technical field of single-fiber signal two-way transmission, and discloses a signal transmission method and system, and the method is applied to a transmitter, and comprises the steps: generating a double-sideband optical modulation signal based on an optical signal and an electric signal; filtering and combining the double-sideband light modulation signal to generate a wavelength division multiplexing single-sideband signal; and sending the wavelength division multiplexing single side band signal to a receiver through an uplink transmission direction or a downlink transmission direction, so that the receiver performs filtering and wave splitting on the wavelength division multiplexing single side band signal to generate a restored electric signal. According to the invention, the number of high-performance filters and signal transmission loss can be effectively reduced.

The invention discloses a non-data-aided low-speed spread-spectrum high-dynamic self-adaptive carrier synchronization device, and relates to the field of high-maneuverability communication systems of airborne, missile-borne and other special platforms in satellite communication. According to the method, the frequency offset is reduced to a certain range by mainly adopting a mode of combining frequency sweeping and frequency estimation, and then the frequency offset change of the receiver is tracked by utilizing a frequency offset change rate estimation method, so that the problems of difficult carrier tracking synchronization and frequent lock losing caused by large frequency offset change are solved; high-dynamic tracking synchronization under a low signal-to-noise ratio can be realized by using a non-data-assisted frequency offset change rate estimation mode and a real-time compensation, real-time monitoring and estimation method. The method is easy to implement, few in occupied resources, operable and high in transportability. The method is very suitable for FPGA implementation, facilitates low-signal-to-noise-ratio demodulation, and can be used for high-maneuvering satellite communication such as broadband and low orbit.

This disclosure provides a signaling configuration method, apparatus, storage medium, and program product, relating to the field of communication technology, for reducing signaling overhead and latency. The method includes: a first node receiving a configuration message sent by a second node, the configuration message containing at least one candidate configuration module; receiving a configuration processing command sent by the second node; and, in response to the configuration processing command, processing the target configuration module indicated by the configuration processing command.

The present application discloses an information processing method, device and terminal, which belongs to the field of communication technology. The information processing method includes: selecting resources according to the information processing capability of the terminal, or the type of the terminal; and / or processing sidelink transmission according to the information processing capability of the terminal, or the type of the terminal. In the embodiment of the present application, resource selection and / or sidelink transmission are processed according to the information processing capability of the terminal or the type of the terminal. Different resource selection methods and sidelink transmission methods can be defined for different information processing capabilities or types of the terminal, which can improve the resource utilization of the sending terminal, thereby improving the transmission efficiency of the sending terminal, improving the spectrum utilization of the system, and reducing the terminal energy consumption.

This disclosure provides a communication method and apparatus under multiple connections. The communication method under multiple connections may include: determining a first message frame, wherein the first message frame includes first identification information for identifying a spatial stream used in a transmission operation and second identification information for identifying a spatial stream used in a reception operation, wherein the transmission operation and the reception operation are performed simultaneously on at least one pair of connections supporting simultaneous transmission and reception; and transmitting the first message frame.

The present invention discloses a channel transmission method, device, equipment and storage medium based on frequency hopping communication. The method includes obtaining the level of each subnode in the network; selecting a subnode with the best signal quality from the upper layer of subnodes of each subnode as the upload proxy node of the subnode; recording the signal quality between each subnode and the upload proxy node, and sorting all frequency points according to the signal quality to establish a frequency transmission performance table; according to the corresponding relationship between the time slot and the frequency point, the frequency point time slot moment is obtained, and when the time slot arrives, according to the frequency point time slot moment, the subnode is made to upload information according to the frequency point level between the subnode and the upload proxy node in the frequency transmission performance table. The present invention ensures the transmission success rate of the subnode uploading information, ensures the transmission efficiency and the stability of the transmission, and indirectly improves the spectrum utilization.

This invention discloses a preamble-free access TA synchronization method and apparatus that saves time-domain resources, comprising: coarse search for candidate TAs: selecting multiple TA candidates within a preset range with a fixed step size; signal preprocessing: receiving repeatedly transmitted Msg3 frames and obtaining the frequency domain data corresponding to each TA candidate; parallel soft combining and score calculation: performing channel estimation, equalization, and descrambling on each candidate data in parallel to obtain descrambling LLR soft bits, and accumulating their absolute values ​​to calculate the synchronization score of each candidate; candidate selection and decoding verification: sorting by score and selecting high-scoring candidates for decoding and CRC verification; synchronization confirmation: using the successfully verified TA as the final synchronization quantity. This invention saves preamble time slots and response windows, significantly reducing access latency and resource consumption.