108 results about "Spectral efficiency" patented technology

Various embodiments comprise a wireless communication network configured to estimate wireless downlink speed. In some examples, the wireless communication network comprises data analysis circuitry. The data analysis circuitry receives a measurement report indicating received signal strength associated with a geographic location and a radio band. The data analysis circuitry converts the received signal strength for the radio band to a spectral efficiency for the radio band. The data analysis circuitry determines bandwidth for the radio band. The data analysis circuitry determines a spectral efficiency ratio for the radio band based on loading for the radio band and the geographic location. The data analysis circuitry estimates a downlink speed for the geographic location and the radio band based on the spectral efficiency ratio, the spectral efficiency, and the bandwidth.

This invention relates to the field of wireless communication network optimization technology, specifically a three-dimensional communication coverage method that jointly optimizes the downtilt angle of ground base stations and the deployment location of airborne base stations. Based on an integrated air-ground network, this method designs a two-layer optimization architecture for network optimization. By handling the location selection of airborne base stations and the adjustment of antenna tilt angles of ground base stations separately, it avoids strong coupling between discrete and continuous variables, thereby preventing superlinear expansion of the solution space. Simultaneously, by introducing SPSA simulated gradient technology and the ZO-Adam optimization algorithm, it overcomes the non-smoothness and non-convexity problems of the system's spectral efficiency function, ensuring the stability and convergence of the optimization process. Furthermore, the two-layer optimization architecture effectively alleviates the path dependency problem of greedy algorithms, achieving a balance between global search and timeliness.

This application provides a communication method and apparatus that can improve spectrum efficiency. The method includes: receiving first information, the first information indicating L in a first polarization among M ports. R There are 1 port, M is an integer greater than 1, and L is a port. R The value is a positive integer; the first channel state information (CSI) is transmitted, which corresponds to L ports on the first polarization out of M ports. The L ports include L... R There are 1 port, where L is greater than or equal to L. R .

The application provides a communication method and a communication device. The method comprises: a first communication device receiving configuration information, the configuration information being used for updating first information associated with the first communication device; and sending feedback information, the feedback information being used for indicating channel information associated with the first communication device, the channel information being determined based on the first information associated with the first communication device, and the channel information being used for data transmission. Therefore, the DMRS used for assisting in receiving data can be omitted, resource overhead caused by sending the DMRS used for demodulating data of each communication device and time delay caused by processing the DMRS are reduced, the channel information can be obtained based on the updated first information associated with the terminal device, the accuracy of obtaining the channel information is ensured, and the system spectral efficiency is improved.

Techniques and apparatuses are described for multiple-input multiple-output transmissions using adaptive phase-changing devices. In aspects, a base station selects one or more adaptive phase-changing devices, APDs, to use in at least one communication path for multiple-input, multiple-output, MIMO, transmissions. The base station can perform a channel characterization process for the at least one communication path using the at least one APD and at least one UE. Based on results of the channel characterization process, the base station configures the at least one APD by which to implement single user-MIMO communication with a UE or multiple user-MIMO communication with multiple UEs. By so doing, the base station may implement MIMO transmissions using APDs to communicate with the at least one UE using same time and frequency resources, which can improve spectral efficiency of a wireless network.

The application discloses a resource allocation method of a hybrid space division multiplexing elastic optical network and belongs to the technical field of optical communication. The application constructs a hybrid network model containing a multi-fiber bundle link and a multi-core optical fiber link, and designs a load and crosstalk aware heuristic algorithm. By means of modulation format step degradation, spectrum window plane construction to implicitly satisfy spectrum continuity constraints, load aware routing to balance network load, crosstalk aware core selection to suppress inter-core crosstalk, and optical signal-to-noise ratio verification to ensure transmission quality, joint optimization of routing, spectrum and spatial channels is realized. The application solves the problem that the prior art is only directed to a single type of space division multiplexing network and is difficult to adapt to a hybrid scene, effectively reduces network blocking rate under the premise of ensuring transmission quality, takes into account crosstalk suppression and spectrum efficiency, and has good engineering practicability.

The application discloses a kind of adaptive spectrum truncation method, device, terminal and medium for single-carrier frequency division multiple access system, method includes: obtaining the context information of current transmission;Based on context information, from the plurality of candidate truncation factors predefined, determine the target truncation factor used by current transmission, wherein the target truncation factor is the ratio of the target frequency domain sample number to be cut off and the original discrete fourier transform point number;The target truncation factor is synchronized to the transmitting device and the receiving device, and the target truncation factor is used to perform discrete fourier transform and spectrum truncation processing on the modulation symbol to be currently transmitted, to generate and send the final time-domain waveform signal.The application focuses on the lightweight adaptive mechanism of frequency domain sample truncation, determines the target truncation factor through context information, realizes the dynamic trade-off of spectral efficiency and transmission power under the premise of no machine learning training and no complex signaling interaction, and is especially suitable for devices sensitive to complexity and latency.

The application discloses a frame structure design method of an AFDM system based on adaptive asymmetric guard bands, solves the problem that the frame structure design of the AFDM system under a high dynamic channel is difficult to simultaneously consider the bit error rate of a receiving end and spectral efficiency, and belongs to the technical field of information and communication.The application comprises the following steps: performing frame-level reliability determination according to a demodulation result vector of a current frame, when a corresponding threshold is satisfied, the current frame accesses an adaptive updating process; on the current frame that accesses, candidate pairs of a time delay index and a Doppler index are obtained, an effective path set of the current frame is screened out, a maximum Doppler spread priori and a Doppler energy directionality priori are extracted from the effective path set, a total guard band width of a next frame and a smooth direction factor are determined, asymmetric distribution of the lengths of guard bands on the left and right sides of a pilot is carried out according to the total guard band width of the next frame, the guard bands are relatively widened on the side of a Doppler energy concentration and are relatively shortened on the side of energy sparseness, and a next frame adaptive asymmetric guard band and a data area layout are generated.

Systems and techniques are provided for wireless communication. A processing system of a network entity can obtain a plurality of data bits associated with one or more bit levels, each bit level associated with a respective subset of data bits of the plurality of data bits. Shaping rate information can be determined corresponding to a configured spectral efficiency value and including a respective shaping rate for each bit level. The plurality of data bits can be encoded using the shaping rate information to generate a set of shaped bits including a respective shaped bit sequence for each bit level based on the respective subset of data bits for each bit level, and a corresponding trellis shaping configuration associated with the respective shaping rate for each bit level. A modulated symbol for the set of shaped bits can be output based on the respective shaped bit sequence for each bit level.

The application provides an adjustable power distribution method suitable for 6G non-orthogonal mobile communication, which comprises the following steps: setting a 6G non-orthogonal mobile communication environment and constraint conditions; according to the set environment and constraint conditions, establishing an optimization problem of maximum spectrum efficiency of a user group and an optimization problem of maximum energy efficiency of the user group and solving the optimization problems to obtain a maximum value of the spectrum efficiency and a maximum value of the energy efficiency; according to the maximum value of the spectrum efficiency and the maximum value of the energy efficiency, establishing an optimization problem of maximum comprehensive efficiency fairness of the user group and solving the optimization problem to obtain total transmission power and a power distribution coefficient of a terminal; and according to the total transmission power and the power distribution coefficient of the terminal, calculating power distributed to each terminal, a spectrum efficiency value, an energy efficiency value and a fairness measure value, and completing power distribution. The application has the advantages of clear structure, strong adaptability and autonomous execution, better meets the demand of 6G network construction and operation and maintenance and academic research, and has high practical value and popularization.

A method for selecting one or more secondary cells, SCells for supporting communication with a user equipment, UE, by carrier aggregation, CA. The one or more SCells is / are selected from a set of SCell candidates available for an access node. The method includes estimating a probability that the UE connected to a primary cell, PCell, of the access node is in coverage of an SCell in the set of candidates, predicting available resources for the SCell, calculating a CA value for the SCell based on the estimated probability, an estimated spectral efficiency and the predicted available resources, and calculating a CA value for each SCell of the set of SCell candidates, ranking the SCells of the set of SCell candidates based on their calculated CA values, and selecting one or more SCells for providing CA with the UE based on the ranking.

The present disclosure relates to a communication method, a terminal, a network device, and a communication system. The communication method comprises: a terminal sending first information to a network device, wherein the first information is used by the network device to determine the number of layers of data to be sent corresponding to the terminal, the first information includes a first number or a second number, the first number is the number of cells with the power not less than a threshold value among wave number domain cells, and the second number is the maximum number of layers of data to be sent corresponding to the terminal. The embodiments of the present disclosure enable a network device to obtain a reference for the number of layers of data to be sent corresponding to a terminal, thereby optimizing or adjusting the value of the number of layers of data to be sent corresponding to the terminal, and improving the spectral efficiency of a MIMO channel link.

Disclosed in the present application are a method and apparatus used in a node for performing encoding in wireless communication. The method comprises: a node receiving first signaling, which indicates scheduling information of a first wireless channel; and then sending the first wireless channel, wherein bits transmitted on the first wireless channel comprise an output of a first encoder, and an input of the first encoder comprises at least a first bit block; candidates of encoders for generating the bits transmitted on the first wireless channel comprise a plurality of encoders; the first encoder is one of the plurality of encoders; each of the plurality of encoders is associated with an adjustment factor; the size of the first bit block depends on a first adjustment factor; and the first adjustment factor is an adjustment factor corresponding to the first encoder. The present application introduces AI / ML to optimize an encoding scheme, thereby improving the transmission performance and the spectral efficiency.

This invention discloses a multi-user downlink transmission analysis method based on a clamped antenna system. It employs a line-of-sight channel modeling method based on geometric location, constructing a large-scale channel gain model dominated by free-space path loss based on the relative positional relationship between the user and the clamped antenna. Downlink transmission models for waveguide multiple access (WMA) and non-orthogonal multiple access (NOA) are derived separately. For different access methods, the interruption probability and average reachability of users are modeled and calculated, thereby achieving a quantitative assessment of system reliability and spectral efficiency. This application can analyze the impact of different transmit powers, user spatial distributions, and clamped antenna deployment parameters on system performance, providing a theoretical basis for access method selection and antenna deployment design in clamped antenna systems, thereby improving the overall transmission performance and resource utilization efficiency of the system.

A communication method and a related apparatus. In the method, when a first communication apparatus receives a first DMRS carried on a first time domain symbol in a first slot, the first communication apparatus can demodulate part or all the data in the first slot on the basis of the first DMRS, wherein the first DMRS is obtained by performing time-frequency domain transformation processing on a DMRS occupying M modulation symbols, and the M modulation symbols are some modulation symbols among a plurality of modulation symbols comprised in the first time domain symbol. In this manner, compared with the process of placing a DMRS in a frequency domain resource after time-frequency domain transformation processing, the approach in which the first DMRS occupies a portion of the modulation symbols comprised in the first time domain symbol can reduce overhead, thereby improving communication performance. In some implementations, N is greater than 1 or other time domain symbols in the first slot can be used for DMRS mapping of other ports, so that the solution can be applied to a multi-stream multi-port data transmission process, and can improve the throughput and spectrum efficiency, thereby further improving communication performance.

A method for MMW wireless communications, comprising the steps of: at a central office, with a QD MWL source, generating at least one optical signal comprising a plurality of different frequency signals; splitting the at least one optical signal into at least one first split signal and at least one second split signal; modulating the at least one first split signal with at least one wireless data signal and generating at least one downlink optical data signal, wherein the at least one frequency signal of the first split optical signal of the QD-MWL is used as an optical local oscillator (LO) for synthesizing RF MMW wireless signals remotely by mixing with the at least one downlink optical data signal; and the at least second split signal of the QD-MWL is used as an optical LO for the receiving uplink wireless signals at the central office.

The application discloses an unmanned aerial vehicle-mounted mixed reconfigurable intelligent surface sensing integrated joint optimization method. The mixed reconfigurable intelligent surface is composed of active reflection units and passive reflection units, wherein the active units can realize signal amplitude amplification and phase control, and the passive units only perform phase control. The application realizes the collaborative improvement of communication and sensing performance by jointly optimizing the base station beamforming, the active / passive reflection coefficients of the intelligent surface and the unmanned aerial vehicle trajectory, can significantly enhance the transmission reliability and sensing accuracy in a shielding environment, has the advantages of high spectrum efficiency, good convergence and strong adaptability, and is suitable for a 6G communication and sensing fusion system.

Provided are a method for waking up a device and a communication apparatus, the method comprising: determining, by a first device, wake-up information, the wake-up information being used to wake up a second device or not to wake up the second device; determining a wake-up sequence based on the wake-up information; and transmitting the wake-up sequence to the second device at a wake-up signal receiving opportunity of the second device, each bit of the wake-up sequence being modulated into one or more low-power wake-up symbols by on-off keying, the wake-up signal receiving opportunity comprising a wake-up signal receiving opportunity frequency domain resource, the wake-up signal receiving opportunity frequency domain resource being adjacent to an edge of a transmission bandwidth of the first device in a frequency domain. The frequency domain resource occupied by the transmission of the low-power wake-up symbol is adjacent to the edge of the transmission bandwidth of the first device in the frequency domain, which can reduce the influence of the transmission of the low-power wake-up symbol on the spectral efficiency of a main communication link, and is conducive to ensuring the compatibility of the link for transmitting the low-power wake-up symbol with the main communication link.

The example of the present application provides a 6G reconfigurable MIMO electromagnetic domain precoding configuration method, comprising establishing a system model containing multipath effect, array geometry and space-fed propagation; introducing spherical harmonic orthogonal decomposition method, representing the phase offset of T-RIS array as a linear combination of spherical harmonic basis functions, converting the spatial domain channel into low-dimensional electromagnetic domain channel state information, and obtaining the electromagnetic domain precoding coefficient vector; taking the system and rate maximization as the target, setting the total transmission power constraint and the phase discrete quantization constraint; using the alternating optimization framework to iteratively solve the electromagnetic domain precoding coefficient vector and the digital domain precoding matrix; and outputting the optimized precoding matrix to configure the T-RIS phase shifter and the base station digital precoder. The example of the present application significantly improves the multi-user spectral efficiency under the condition of meeting the hardware discrete phase limit, reduces the computational complexity, and is suitable for 6G reconfigurable MIMO system through electromagnetic domain dimension reduction and alternating optimization.

The disclosure provides a communication method, a communication device and a communication system, and relates to the technical field of communication. The method comprises the following steps: a terminal receives first information sent by a network device, and then determines a MCS index range corresponding to a first modulation mode in a MCS table according to the first information. For example, for a higher code rate π / 2-BPSK modulation mode, the terminal can accurately determine the MCS index range of the π / 2-BPSK modulation mode in the MCS table. Subsequently, the terminal can accurately use the higher code rate π / 2-BPSK modulation mode for uplink data transmission according to the indication of the network device, effectively reduces the PAPR, thereby improving the spectral efficiency and improving the uplink coverage.

The application provides a kind of multi-carrier multiplexing method and equipment based on non-orthogonal overlapping chirp signal, and relates to wireless communication technical field.The application generates time-frequency domain non-orthogonal overlapping chirp subcarrier at sending end and carries out data modulation and superposition, breaks through the upper limit of frequency spectrum efficiency of traditional orthogonal multiplexing technology.Receiving end carries out matching filtering to receiving signal and obtains mixed correlation value vector containing all subcarrier information, introduces and constructs equivalent channel matrix based on local subcarrier cross-correlation, accurately depicts the deterministic interference structure caused by non-orthogonal overlapping.After that, zero-forcing detection algorithm is used to jointly process correlation value vector using the equivalent channel matrix, so as to actively and systematically eliminate serious inter-subcarrier interference at receiving end.The application realizes high frequency spectrum efficiency transmission, solves the core demodulation problem caused by non-orthogonal overlapping, and guarantees the reliable signal recovery ability of system under strong interference.

The present disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data transmission rate than a 4th generation (4G) communication system such as long-term evolution (LTE). Disclosed is a method performed by a terminal that may comprise: receiving configuration information for a CSI report from a base station; acquiring a channel quality indicator (CQI) table on the basis of the configuration information for the CSI report; and transmitting CSI including a CQI according to the CQI table to the base station, wherein the CQI table is configured on the basis of a first CQI table of a case where transport block error probability is 0.1 and a second CQI table for a case where transport block error probability is 0.00001. The method performed by the terminal may further comprise: receiving configuration information relating to a physical uplink shared channel (PUSCH) or a physical downlink shared channel (PDSCH) from the base station; identifying a modulation and coding scheme (MCS) table on the basis of the configuration information relating to the PUSCH or PDSCH; and acquiring a transport block size (TBS) on the basis of the MCS table, wherein the MCS table is configured on the basis of a first MCS table configured by default and a second MCS table configured for low spectral efficiency (SE) in the base station.

The embodiment of the invention provides a communication method, user equipment and a base station. The method comprises the following steps: sending a lead code; a random access response is received in a first downlink frequency domain resource group, the random access response comprises uplink authorization, and the first downlink frequency domain resource group comprises downlink frequency domain resources used for transmitting system information and / or synchronization signals; receiving a second reference signal in at least one second downlink frequency domain resource group, wherein the at least one second downlink frequency domain resource group comprises downlink frequency domain resources except the first downlink frequency domain resource group; sending a PUSCH (Physical Uplink Shared Channel), the PUSCH being scheduled by the uplink grant, and the PUSCH comprising a CSI (Channel State Information) report related to the second reference signal; and receiving the third PDSCH on the second downlink frequency domain resource group. According to the embodiment of the invention, the downlink spectrum efficiency can be improved. The present disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond 4G communication systems such as Long Term Evolution (LTE).

This application discloses a method and apparatus for encoding in a node used in wireless communication. The node receives first signaling indicating scheduling information for a first wireless channel; subsequently, it transmits the first wireless channel; bits transmitted on the first wireless channel include the output of a first encoder, the input of which includes at least a first bit block; candidates for an encoder to generate the bits transmitted on the first wireless channel include a plurality of encoders; the first encoder is one of the plurality of encoders; each of the plurality of encoders is associated with an adjustment factor; the size of the first bit block depends on the first adjustment factor, which is an adjustment factor corresponding to the first encoder. This application improves transmission performance and spectral efficiency by introducing an AI / ML optimized coding scheme.

The application relates to a reconfigurable surface-assisted index modulation method based on non-orthogonal multiple access, and belongs to the technical field of communication. The method comprises the following steps: S1, establishing an RIS-IM-NOMA system model, and defining a reflection coefficient matrix and a detection mode; S2, deducing and analyzing a theoretical upper limit of the bit error rate of the system model; S3, theoretically analyzing the performance of the spectral efficiency of the system model and putting forward a user-to-user spectral efficiency fairness problem; and S4, optimizing and designing a power distribution mode to improve system fairness.