Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
58results about How to "Guaranteed Spectral Efficiency" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Wireless communication method and device for reducing network delay
ActiveCN106788926AGuaranteed Spectral EfficiencyGuaranteed robustnessSignal allocationWireless communicationTime domainDistribution method
The present invention discloses a wireless communication method and device for reducing network delay. The UE sends the upstream signal. The upstream signal occupies part or all of the broadband symbols of the first short time slot. The duration of the first short time slot is less than 1 millisecond; the first short time slot is located in the first LTE subframe in the time domain; the first LTE subframe includes N short time slots. The number of the broadband symbols in the first short time slot is related to the location of the first short time slot in the first LTE subframe. If the first short time slot is the last short time slot in the N short time slots and includes the last broadband symbol of the first LTE subframe, the number of broadband symbols in the first short time slot is no less than K. Through designing the distribution method of the new short time slots in the LTE subframe, and the mapping method of the corresponding upstream signal and upstream reference signal, the present invention ensures channel estimation and transmission performance of the upstream signal and avoids the conflict of signal and SRS in the short time slot.
Owner:SHANGHAI LANGBO COMM TECH CO LTD
Method and device for mapping resources of control channel in communication system
ActiveCN101808411ASimple processGuaranteed Spectral EfficiencyMulti-frequency code systemsWireless communicationCommunications systemFrequency spectrum
The invention discloses a method for mapping resources of a control channel in a communication system. The method comprises the following steps of: differing a process of mapping resources of a subframe of a broadcast control channel from a process of mapping resources of a subframe of a non-broadcast control channel; and instructing the process of mapping resources of the subframe of the non-broadcast control channel through control information in the broadcast control channel. The technical scheme solves the problems of occupying resource positions by a synchronization channel and the broadcast control channel and modes, simplifies the process that a terminal identifies the broadcast control channel and ensures frequency spectrum efficiency of a wireless communication system based on OFDMA technology through the design scheme of the control channel.
Owner:ZTE CORP
Frequency planning method based on synergic multi-point single-user multi-input multi-output
InactiveCN101511107AReduce computational complexityReduce the amount of information interactionNetwork traffic/resource managementMulti inputFrequency reuse
The invention provides a frequency layout method based on cooperating with multi-point single user multi-input and multi-output which includes steps as follows: averaging a frequency segment occupied by the subdistrict by using CoMP transmitting into three equal parts: three sectors occupy one third of the subdistrict frequency segment orderly; then dividing each sector frequence band into a CoMPSector Zone frequency band for providing service to CoMP user, and residual frequency band services the non-CoMP user by a method of using a frequency reuse factor; selecting CoMP mode participated by a virtual subdistrict according with a user transmitting ratio requirement, then distributing CoMP sector Zone frequency band size according with the transmitting requirement ratio of CoMP user and non-CoMP user, finally deciding whether adjusting or transfering to CoMP Sector Zone frequency band size or CoMP mode real time according with the measurement and feedback of the user chunnel quality. The method can reduce calculating complex degree and information alternation amount to the network carried by CoMP, ensure frequency spectrum of the whole edge user and the whole system, and increase system chunnel capacity.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Method for distributing radio resources
InactiveCN101568155AIncrease flexibilityMeet scheduling requirementsNetwork traffic/resource managementCommunications systemFrequency spectrum
The invention discloses a method for distributing radio resources, which comprises the steps: a dispatching party selects an expanding mode for expanding basic resource blocks or a splitting mode for splitting the basic resource blocks according to predetermined factors; the dispatching party splits the basic resource blocks to obtain splitting resource blocks or expands the basic resource blocksto obtain expanding resource blocks according to the selected splitting mode or the selected expanding mode; the dispatching party dispatches the expanding resource blocks or the splitting resource blocks to a dispatched party and indicates the selected splitting mode or the selected expanding mode to the dispatched party in a predetermined mode; and the dispatching party uses the basic resource blocks, the expanding resource blocks and the splitting resource blocks or the combination of the blocks to carry out resource distributing description and transmits resource distributing description information to the dispatched party. The invention can increase the dispatching efficiency of the radio resources and ensure different service types of QoS and the spectrum efficiency of a prospectivewireless communication system.
Owner:ZTE CORP
Energy efficiency optimization method based on full-duplex bidirectional relay D2D network
ActiveCN106255133AReduce distractionsGuaranteed Spectral EfficiencyPower managementNetwork traffic/resource managementSelf interferenceHigh density
The invention discloses an energy efficiency optimization method based on a full-duplex bidirectional relay D2D network. The method comprises a cellular user, a pair of full-duplex D2D users multiplexing the frequency band of the cellular user, and one full-duplex bidirectional relay user assisting with D2D communication. By use of a double-layer alternative iteration optimization algorithm, the transmission power of the cellular user and the full-duplex D2D users and the amplification gain of the full-duplex bidirectional relay user can be dynamically adjusted, the influences exerted by interference between the users and self-interference of the full-duplex users on network performance are effectively alleviated, and the energy efficiency of a system can be maximized under the constraints of minimum frequency spectrum efficiency. During communication of the cellular user, the full-duplex relay-assisted D2D users can share the frequency band of the cellular user for direct communication, by use of cellular network basis configuration, same-time same-frequency D2D communication and cellular communication are realized, power consumption of the cellular communication is reduced, the energy efficiency of a cellular network is effectively improved, and the method is applied to communication environment with requirements for high density and low power consumption.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Heterogeneous network resource allocation method based on reinforcement learning
ActiveCN112351433AGuaranteed Spectral EfficiencyGuaranteed throughputPower managementNetwork planningSpectral efficiencyHeterogeneous network
The invention discloses a heterogeneous network resource allocation method based on reinforcement learning, and the method comprises the steps: firstly deploying a DNN frame at each base station, enabling the frame to be based on an ADMM algorithm, and taking channel information as the weight of a network; giving an optimal resource allocation strategy in the current state according to the data obtained by the base station, namely the current user association information and the average interference power; taking each base station as an independent main body, and the state of the base stationas a modeling environment; enabling a plurality of agent programs to observe the same heterogeneous network environment and take action, wherein the agent programs communicate with one another throughrewards of the environment; and enabling agents to adjust policies according to rewards; the resource allocation method provided by the invention is based on the deep learning network, a resource allocation scheme can be given without all CSI information, the spectral efficiency is considered at the same time, and the spectral efficiency function is set as the award of the agent, so that the spectral efficiency can be ensured while the throughput of the system is ensured.
Owner:NANJING UNIV OF POSTS & TELECOMM
A generalized spatial modulation method based on antenna combination and constellation joint mapping
ActiveCN109150275AIncrease profitModulation order reductionSpatial transmit diversityPhase-modulated carrier systemsMaximum likelihood detectionModulation order
The invention provides a generalized spatial modulation method based on antenna combination and constellation joint mapping. Firstly, a generalized spatial modulation antenna combination table and a modulation information table are combined into a joint mapping table. Then, the binary bit information bits are mapped to the joint mapping table, and the information is transmitted to the receiving end through the transmitting end antenna. Finally, the receiving antenna performs maximum likelihood detection according to the received information and generates a final decision result. By combining the antenna combination table and the modulation information table in the generalized spatial modulation system, the invention breaks through the limitation that the combination number of the traditional generalized spatial modulation antennas must be a power of two. By increasing the number of antenna combinations in the joint mapping, the modulation order in the constellation is reduced, therebyimproving the BER performance of the system and the reliability of the system.
Owner:DONGHUA UNIV
Energy-efficient user access and power control method for heterogeneous network
ActiveCN107708197AImprove energy efficiencyEnsure fairnessPower managementAssess restrictionPower controlHeterogeneous network
The invention discloses an energy-efficient user access and power control method for a heterogeneous network. A logarithmic utility model is introduced to jointly optimize user access and power control of the heterogeneous network, so as to maximize a utility value of network energy efficiency. The method comprises the following steps that first, all base stations estimate according to pilot sequences so as to obtain current user channel state information; then, the base stations raise a problem of maximum utility of network energy efficiency; and finally, the base stations consider a problemof optimal user access and power control, convert the original problem into a series of convex sub-problems, perform alternating iterative optimization till the algorithm converges so as to obtain anoptimal user access and transmission power allocation solution. The method considers optimization of user access and power control in the heterogeneous network comprehensively, uses the utility of network energy efficiency as an optimized target function, and realizes efficient transmission while ensuring user fairness and throughput.
Owner:SOUTHEAST UNIV
Resource mapping method and resource mapping device of control channels in communication system
InactiveCN103178948ASimple processGuaranteed Spectral EfficiencyTransmission path multiple useWireless communicationFrequency spectrumCommunications system
Owner:ZTE CORP
Hybrid beam forming transmission method and system
InactiveCN108832981AReduce complexityImprove performanceSpatial transmit diversityHigh level techniquesHybrid beamformingFrequency spectrum
The invention discloses a hybrid beam forming transmission method and system. The hybrid beam forming transmission method comprises the following steps: a plurality of first antennas of a sending endbase station are connected with a plurality of first radio frequency links through first-part connection sub-arrays and serve a single receiving end device; a plurality of second antennas arranged onthe receiving end device are connected with a plurality of second radio frequency links through second-part of connection sub-arrays, wherein each second radio frequency link is connected with one ormore second antennas arranged on a second-part connection sub-array that are different from each other; and the sending end base station and the receiving end device perform united beam training to confirm an analog weighted coefficient matrix and a digital weighted coefficient matrix, so that downlink transmission of data is carried out based on the analog weighted matrix and the digital weightedmatrix. The hybrid beam forming transmission method and system can provide an effective single-user multi-data stream transmission scheme based on the hybrid beam forming structure of part connectionsub-arrays, which has good performances, reduces the complexity of hardware, and can effectively guarantee spectrum efficiency and improve energy efficiency.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Narrowband wireless communication method and device
ActiveCN106877986ARealize single-frequency transmission modeReduce overheadSignal allocationCommunications systemUplink transmission
The present invention discloses a narrowband wireless communication method and device. A UE send at least one of a first feature sequence, a second feature sequence, a third feature sequence and a fourth feature sequence. The first feature sequence, the second feature sequence, the third feature sequence and the fourth feature sequence are respectively sent on corresponding resource spaces. The resource spaces belong to a first resource set, and the first resource set performs indication through a first signaling. When transmission time windows of two given feature sequences have collision, the given feature sequences are sent according to a certain predefined priority. Through design of a new uplink non-data channel resource distribution and sending mode, the narrowband wireless communication method and device realize that small resource bears uplink non-data channel transmission. Especially, when the UE uplink transmission only supports single subcarrier, the narrowband wireless communication method and device can effectively send the uplink non-data channel so as to reduce transmission delay and ensure the reliability of the uplink transmission of the narrowband communication system.
Owner:SHANGHAI LANGBO COMM TECH CO LTD
Nonlinear effect suppression method and system for CO-OFDM (Coherent Optical Orthogonal Frequency Division Multiplexing) system
InactiveCN109547387AReduce nonlinear effectsIncrease flexibilityTransmission path divisionCarrier regulationCarrier signalEngineering
The invention discloses a nonlinear effect suspension method and system for a CO-OFDM (Coherent Optical Orthogonal Frequency Division Multiplexing) system. The nonlinear effect suspension method comprises the steps of: at a system sending end, for a random group, acquiring a conjugate symbol in phase conjugation with a pilot symbol so as to obtain a corresponding neighbor estimation group; carrying out carrier mapping on the pilot symbol, the conjugate symbol and a data symbol and sending a carrier to a system receiving end; at the system receiving end, carrying out frequency domain signal reduction on the carrier sent from the system sending end, and extracting the pilot symbol, the conjugate symbol and the data symbol; carrying out coherent superposition on the extracted pilot symbol andthe corresponding conjugate symbol so as to compensate a nonlinear phase shift in the pilot symbol; and estimating a nonlinear phase shift of the data symbol in the same neighbor estimation group byutilizing the extracted pilot symbol and the corresponding conjugate symbol, and carrying out compensation on the nonlinear phase shift of the data symbol. According to the invention, damage caused bya nonlinear effect in the CO-OFDM system can be effectively and comprehensively compensated in real time.
Owner:HUAZHONG UNIV OF SCI & TECH
Special power supply for gate access control system and control method thereof
ActiveCN107426775AReduce complexityReduce the amount of informationNetwork traffic/resource managementAssess restrictionEngineeringAlternating current
The invention discloses a special power supply for a gate access control system and a control method thereof. The special power supply includes two independent first input-and-output branches, a second input-and-output branch, a switching module and a battery management module, wherein each input-and-output branch possesses an independent protection circuit, meaning that when one of the branches closes the output due to abnormality, the output of others is not affected, and that when the abnormality is resolved, the branches can restore to normality automatically. In addition, each input-and-output branch possesses an independent abnormality counter; and the times of output closing by a branch due to abnormality becomes greater than a set value, attempts to restore to the normal state stop automatically, and restoration can only be realized manually. The special power supply disclosed in the present invention supports the power supply to a standby battery. When the alternating current is cut off, the two outputs are continuously switched and supplied with power by the standby battery. When the alternating current is restored, the system can automatically switch to the alternating current output and charges the batteries.
Owner:SOUTHEAST UNIV
Multi-carrier-based method for mapping resource
InactiveCN101742666AGuaranteed Spectral EfficiencySolve the problem that cannot meet the needs of wireless communication systems based on OFDMA technologyWireless communicationSubcarrierInformation mapping
The invention discloses a multi-carrier-based method for mapping a frequency resource. In a mapping method, an available subcarrier is divided into n physical resource units, and a first displacement operation is carried out on the n physical resource units, wherein the first displacement operation takes n1 physical resource units as a unit; the n physical resource units after the first displacement operation are mapped into a plurality of frequency partitions according to frequency partition configuration information; a second displacement operation is carried out on part of or total physical resource units in each frequency partition, wherein the second displacement operation takes n2 physical resource units as a unit; the physical resource units after the second displacement operation are mapped into logic resource units; and n, n1 n2 are integers more than or equal to 1, and n is more than or equal to n1 and n2. The method can ensure the spectrum efficiency of a multi-carrier technology-based wireless communication system.
Owner:ZTE CORP
Scheduling method and system of multi-cluster resources in uplink shared channel
ActiveCN106572536AGuaranteed channel conditionsGuaranteed Spectral EfficiencyTransmission path divisionWireless communicationUser needsMulti cluster
The application provides a scheduling method and system of the multi-cluster resources in an uplink shared channel. The method comprises the steps of gathering the users needing to be distributed with the uplink resources, generating a user list, calculating the carrier priorities on different carriers of the users in the user list, determining the first carriers and the second carriers corresponding to the users, distributing the uplink resources to the user having the highest scheduling priority in the user list, and bearing the to-be-transmitted resources of the users via the resource clusters of the first carriers and the second carriers, wherein the first carriers having the highest priorities are used to bear the to-be-transmitted resources of the users as much as possible. According to the present invention, the frequency spectrum efficiency of the frequency spectrum resources of each resource cluster is guaranteed while guaranteeing the channel conditions distributed to the resource clusters of the users, thereby improving the resource utilization efficiency of a physical uplink shared channel (PUSCH).
Owner:PEKING UNIV
Code word acknowledgement information feedback method and communication device
InactiveCN102158322AReduce signaling overheadGuaranteed capacity and spectral efficiencyError prevention/detection by using return channelAutomatic repeat requestTelecommunications equipment
The invention provides a code word acknowledgement information feedback method, which comprises the following steps of: receiving a code word from user equipment (UE); determining the acknowledgement information of the code word; and feeding the acknowledgement information of the code word back to the UE by using a physical downlink control channel (PDCCH). Single code words are transmitted by the method to realize the repeat and feedback of each code word in an uplink code word pair without increasing signaling overhead, thereby saving uplink resources and the transmission power of the user equipment and ensuring the capacity of a system and spectrum effects; and the acknowledgement information of the single uplink code word can be fed back without a physical hybrid automatic repeat request indication channel, thereby saving the signaling overhead.
Owner:HUAWEI TECH CO LTD
Collocation method of control channels in communication system
InactiveCN101820688AResolve locationSolutionMulti-frequency code systemsWireless communicationCommunications systemFrequency spectrum
The invention discloses a collocation method of control channels in a communication system, comprising: the communication system supports cyclic prefixes with different lengths, and the numbers of logic resource units occupied by the broadcast control channels of the communication system are same. The invention solves the problem-how the control channels to occupy resource positions and modes, ensures that a terminal can accurately decode control information and ensures the frequency spectrum efficiency of a wireless communication system.
Owner:ZTE CORP
The invention relates to a pilot and data superposition transmission method of a SCMA multiple access system
ActiveCN109039567AImprove accuracyGuaranteed Spectral EfficiencyBaseband system detailsInter user/terminal allocationFrequency spectrumTelecommunications
The invention belongs to the technical field of wireless communication and relates to a pilot and data superposition transmission method of a SCMA multiple access system. The invention first estimatesthe initial channel information of a plurality of users through a group of orthogonal pilot sequences, and then updates the channel information of different users in a mode of pilots and data superposition of different users. Under this pilot allocation scheme, there is no pilots superposition of different users on each sub-carrier, only data and pilots superposition of different transmitting users, which not only improves the accuracy of channel estimation, but also ensures the spectral efficiency of the system.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Channel recovery method of coherent optical orthogonal frequency division multiplexing system of hidden training sequence
ActiveCN105553891ASpectrum Efficiency ImpactGuaranteed Spectral EfficiencyChannel estimationMulti-frequency code systemsRecovery methodFrequency spectrum
The present invention relates to the field of optical fiber communication, and particularly relates to a channel recovery method of a coherent optical orthogonal frequency division multiplexing system of a hidden training sequence. Through adding a training sequence on a transmission signal, the training sequence is extracted at a receiving end and the channel is estimated. Then the interference of the training sequence is eliminated at the receiving end, the estimated channel is used to balance the signal, and thus the recovery of the signal is completed. According to the method, the spectral efficiency of the coherent optical orthogonal frequency division multiplexing system can be improved.
Owner:WUHAN POST & TELECOMM RES INST CO LTD
Carrier interference elimination method and device, electronic equipment and storage medium
ActiveCN111698185AGuaranteed Spectral EfficiencyGuaranteed performanceTransmission monitoringTransmitter/receiver shaping networksTransceiverFrequency spectrum
The embodiment of the invention discloses a carrier interference elimination method and device, electronic equipment and a storage medium. The method comprises the following steps: when a radio frequency transceiver receives a plurality of subcarrier signals of a plurality of sub-bands with different parameter sets in the bandwidth of a bandwidth subset BWP, determining an interference eliminationsubcarrier set i corresponding to the ith sub-band; determining an interference elimination subcarrier set j corresponding to the jth subband, i, j being a positive integer, and constructing a received signal model according to the interference elimination subcarrier set i and the interference elimination subcarrier set j; and performing iterative demodulation and signal interference eliminationon the subcarriers in the interference elimination subcarrier set i and the interference elimination subcarrier set j according to the received signal model, so that interference elimination can be carried out on the received subcarriers in the plurality of subbands of different parameter sets on the premise of maintaining the spectral efficiency, and the performance of received subcarrier signalsis ensured.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Blind carrier offset estimation method in CP-FBMC communication system
ActiveCN107204953AGuaranteed Spectral EfficiencyImprove estimation performanceCarrier regulationMulti-frequency code systemsCommunications systemFrequency spectrum
The present invention discloses a blind carrier offset estimation method in a CP-FBMC communication system. The objective of the invention is to improve the estimation performance while ensuring frequency spectrum efficiency through design of a reasonable virtual subcarrier distribution mode. The technical scheme comprises: distributing three or more than three virtual subcarriers at the emission end of the CP-FBMC system, employing the virtual subcarriers being not adjacent to data subcarriers at the receiving end of the system to calculate a cost function, and the frequency offset test value corresponding to the minimum value of the cost function is a frequency offset estimation value.
Owner:XI AN JIAOTONG UNIV
A novel hybrid beamforming structure and setting method of millimeter wave mu-miso system
ActiveCN110166103BReduce complexityCompensate for performance lossSpatial transmit diversityHigh level techniquesFrequency spectrumUp conversion
The present invention provides a novel hybrid beamforming structure and setting method of a millimeter wave MU-MISO system. The method of the present invention includes: a digital beamformer for processing the amplitude and phase of the signal in the baseband, a plurality of radio frequency chains for frequency conversion of the signal, and an analog beamformer for phase modulation of the radio frequency signal. The transmitted signal is firstly digitally beamformed at the baseband by the digital beamformer, and then frequency up-converted by the radio frequency chain to obtain an analog signal; finally, the analog beamforming is completed. The present invention uses a low-energy low-resolution phase shifter and a simple switch network to realize a dynamic sub-array structure, while effectively reducing energy consumption, and utilizes millimeter-wave large-scale antennas and flexible diversity of multiple users to compensate for low-resolution The performance loss caused by the phase shifter and the fixed sub-array achieves a win-win situation of system energy efficiency and spectrum efficiency.
Owner:DALIAN UNIV OF TECH
A Heterogeneous Network Resource Allocation Method Based on Reinforcement Learning
ActiveCN112351433BGuaranteed Spectral EfficiencyGuaranteed throughputPower managementNetwork planningResource assignmentSpectral efficiency
Owner:NANJING UNIV OF POSTS & TELECOMM
An energy-saving strip coverage relay station deployment method
ActiveCN105722101BEnable Deterministic DeploymentGuaranteed Spectral EfficiencyNetwork planningHigh level techniquesQuality of serviceFrequency spectrum
The invention discloses an energy-saving band-shaped coverage relay station deployment method. The method comprises following steps of firstly, analyzing the length and width of a band-shaped closed region; considering to use a divide cover deployment method to cover the band-shaped region completely; further building an interference weight value matrix among relay stations; constructing a basic model which ensures that the interference weight value matrix among the relay stations is a zero matrix, ensures the spectral efficiency and synchronously maximizes the energy efficiency; using an exhaustive search method to search optimum distances among the relay stations; and finally determining the positions and the quantity of the relay stations. The method can be applied in a cellular relay network. According to the method, the relay stations can be directly deployed in the weak band-shaped region; the total energy consumption of the communication system is reduced; moreover, the system spectral efficiency and the user quality of service are ensured; and the method can be extended to deploy other weak regions, such as airport runway and high-speed rail, of the cellular network.
Owner:GUILIN UNIV OF ELECTRONIC TECH
A method and system for suppressing nonlinear effects of co-ofdm systems
InactiveCN109547387BReduce nonlinear effectsIncrease flexibilityTransmission path divisionCarrier regulationCarrier signalControl theory
The invention discloses a nonlinear effect suspension method and system for a CO-OFDM (Coherent Optical Orthogonal Frequency Division Multiplexing) system. The nonlinear effect suspension method comprises the steps of: at a system sending end, for a random group, acquiring a conjugate symbol in phase conjugation with a pilot symbol so as to obtain a corresponding neighbor estimation group; carrying out carrier mapping on the pilot symbol, the conjugate symbol and a data symbol and sending a carrier to a system receiving end; at the system receiving end, carrying out frequency domain signal reduction on the carrier sent from the system sending end, and extracting the pilot symbol, the conjugate symbol and the data symbol; carrying out coherent superposition on the extracted pilot symbol andthe corresponding conjugate symbol so as to compensate a nonlinear phase shift in the pilot symbol; and estimating a nonlinear phase shift of the data symbol in the same neighbor estimation group byutilizing the extracted pilot symbol and the corresponding conjugate symbol, and carrying out compensation on the nonlinear phase shift of the data symbol. According to the invention, damage caused bya nonlinear effect in the CO-OFDM system can be effectively and comprehensively compensated in real time.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for distributing radio resources
InactiveCN101568155BIncrease flexibilityMeet scheduling requirementsNetwork traffic/resource managementCommunications systemResource block
The invention discloses a method for distributing radio resources, which comprises the steps: a dispatching party selects an expanding mode for expanding basic resource blocks or a splitting mode for splitting the basic resource blocks according to predetermined factors; the dispatching party splits the basic resource blocks to obtain splitting resource blocks or expands the basic resource blocks to obtain expanding resource blocks according to the selected splitting mode or the selected expanding mode; the dispatching party dispatches the expanding resource blocks or the splitting resource blocks to a dispatched party and indicates the selected splitting mode or the selected expanding mode to the dispatched party in a predetermined mode; and the dispatching party uses the basic resource blocks, the expanding resource blocks and the splitting resource blocks or the combination of the blocks to carry out resource distributing description and transmits resource distributing description information to the dispatched party. The invention can increase the dispatching efficiency of the radio resources and ensure different service types of QoS and the spectrum efficiency of a prospective wireless communication system.
Owner:ZTE CORP
Resource allocation method for electric power wireless private network based on cognitive radio
ActiveCN109348487BAvoid occupancy conflictsAvoid switchingHigh level techniquesWireless communicationSystem capacityFrequency spectrum
The present invention provides a cognitive radio-based power wireless private network resource allocation method, the method includes the following steps: S1. Each SU user periodically perceives the position of the spectrum hole and the size of the spectrum in the spectrum environment of the location; S2 .Establish the resource allocation model R of the electric power wireless private network: S3. Transform the resource allocation into power allocation and subcarrier group allocation according to the established electric power wireless private network resource allocation model R, and perform network resource allocation according to the subcarrier group and optimal power; The impact of time-varying spectrum resources can be considered in the resource allocation of electric power wireless private network, so as to effectively avoid frequent spectrum occupation conflicts and handover problems, thereby ensuring the stability and reliability of users accessing wireless networks, and effectively ensuring spectrum efficiency and system capacity.
Owner:STATE GRID CORP OF CHINA +1
Multi-user hybrid beamforming algorithm and implementation device in millimeter wave massive mimo-ofdm system
InactiveCN108494452BRF Gain MaximizationReduce distractionsSpatial transmit diversityMulti-frequency code systemsFrequency spectrumAlgorithm
The invention discloses an algorithm and an implementation device for multi-user hybrid beamforming in a millimeter-wave large-scale MIMO-OFDM system, which are used to realize a multi-user hybrid beamforming design in a large-scale MIMO-OFDM system. The algorithm is specifically divided into three steps. The first step is to obtain the lower limit of the sum of the base station and user radio frequency link gains under all subcarriers according to the Jensen inequality, and design a common analog coding and combining matrix according to the maximization of the lower limit; the second step , when the common analog coding and combining matrix are known, the digital coding matrix corresponding to all subcarriers at the base station is obtained according to the maximization of the SNR; the third step is to design the digital combining matrix at the user end according to the MMSE criterion. While ensuring the spectral efficiency of the system, the algorithm effectively reduces the interference between users under different subcarriers, and the performance of the algorithm is better in the case of low signal-to-noise ratio.
Owner:BEIJING UNIV OF POSTS & TELECOMM
A method and system for scheduling multi-cluster resources in an uplink shared channel
ActiveCN106572536BGuaranteed channel conditionsGuaranteed Spectral EfficiencyTransmission path divisionWireless communicationComputer networkFrequency spectrum
This application provides a method and system for scheduling multi-cluster resources in an uplink shared channel. By counting users who need to allocate uplink resources, and generating a user list, calculating the carrier priority of each user in the user list on different carriers, determine The first carrier and the second carrier corresponding to each user allocate uplink resources for the user with the highest scheduling priority in the user list, and carry the resources to be transmitted by the user through the resource clusters of the first carrier and the second carrier. The first carrier with the highest level carries the user's to-be-transmitted resources. While ensuring the channel conditions of the resource clusters allocated to the user, the spectrum efficiency of the spectrum resources of each resource cluster is guaranteed, thereby improving the PUSCH resource utilization efficiency.
Owner:PEKING UNIV
A method and device for selecting a decoding and forwarding relay node for a user terminal
ActiveCN103458426BAvoid concentrationGuaranteed Spectral EfficiencyError preventionNetwork planningTelecommunicationsCommunication quality
Disclosed is a method for choosing a decode-and-forward (DF) type relay node (RN) for user equipment (UE), comprising: grouping UE which is ready for performing network coding (NC) according to the communication quality of the UE; selecting a UE group one by one, selecting UE from the selected UE group, and choosing a corresponding DF type RN for the UE according to a rule for choosing a DF type RN; and again according to a rule for selecting UE, selecting corresponding UE for the chosen DF type RN respectively from each of other UE groups except the selected UE group. Disclosed at the same time is a device for choosing a DF type RN for UE. The present invention can be adopted to ensure the service throughput of a cell, and further ensure the frequency spectrum efficiency of edge UE of the cell.
Owner:ZTE CORP
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com