206 results about "Modulation coding" patented technology

A spatial adaptive multi-user service modulation and demodulation method suitable for various channel environments is characterized in that an uplink channel is configured with multiple paths of general carriers and multiple paths of helicopter special carriers in a frequency division mode, and the general carriers support uplink adaptive information transmission of terminals of various types and sizes in an MF-TDMA (Multimedia Frequency-Time Division Multiple Access) system; the on-satellite demodulator obtains a modulation coding mode of a burst data segment by identifying mode word information in a physical layer frame header, and demodulates a corresponding mode; the carrier special for the helicopter uses a continuous carrier mode, and multi-rate channel error correction coding and decoding under rotor wing shielding are supported in a channel interleaving mode. Downlink transmission is carried out in a fixed time slot and free time slot time division mode, and downlink information transmission for universal multi-type terminals and helicopter terminals can be supported at the same time. Compared with a common spatial modulation and demodulation method, the modulation and demodulation scheme provided by the invention can support adaptive transmission of general services of multiple types of terminals and helicopter service information on both an uplink and a downlink by using one satellite-borne modem.

A modulation and coding scheme indication method and a corresponding apparatus in a wireless local area network system that supports one or more of a next-generation Wi-Fi protocol of IEEE 802.11ax (for example, 802.11be, Wi-Fi 7, or EHT), a next-generation Wi-Fi protocol of IEEE 802.11be (for example, 802.11bn, Wi-Fi 8, or UHR), Wi-Fi AI, a millimeter wave (mm Wave), an ultra wideband (UWB), and sensing (sensing). A method includes: generating a physical layer protocol data unit PPDU, where the PPDU includes a first field and a second field, the first field indicates a first modulation and coding scheme MCS group, and the second field indicates a number of spatial streams corresponding to one or more MCSs in the first MCS group; and sending the PPDU. This can reduce bit overheads.

The invention relates to an aliasing image target recognition and positioning algorithm based on sub-view-field shape modulation coding, relates to the technical field of aliasing image target recognition and view field judgment and positioning, and solves the technical problem that the scale and view field of a detector cannot be considered when large-view-field and high-resolution imaging is realized under the condition of a limited detector in the prior art. The algorithm comprises the following steps: identifying a foreground target; tracking a target rotation state; and judging the relevance between the target motion trail and the light spot shape change trend and inversely solving the actual spatial position. According to the aliasing image target recognition and positioning algorithm based on sub-view-field shape modulation coding, space-based early warning and large-width detection are achieved through the advantages of low power consumption and low cost of a small target surface detector, and the bottleneck that large-view-field imaging of an infrared optical system is limited by the manufacturing process of an infrared detector is broken through. According to the invention, through continuous frame light spot morphological feature extraction and trajectory-shape double-domain correlation modeling, unique determination and high-precision positioning of a view field of an object space where a target is located are realized.

Disclosed are a method and a device for performing Internet of things (IoT)-based communication in a wireless communication system. A method according to an embodiment of the present disclosure may comprise the steps of: identifying, by a first device, at least one of a modulation and coding scheme (MCS), repeated transmission, and transmission power for physical device-to-reader channel (PDRCH) transmission on the basis of a configuration or an indication from a second device; and transmitting, by the first device, a PDRCH to the second device on the basis of an energy level of the first device. Here, on the basis that the energy level of the first device does not satisfy a predetermined condition, transmission of the PDRCH may be performed by changing at least one of the MCS, the repeated transmission, and the transmission power.

Provided in the present application are a communication method and a communication apparatus, which can be applied to the field of communications. In the technical solutions provided in the present application, a communication device may predict, on the basis of historical interference information of an interfering satellite to a serving satellite and state information of the interfering satellite, interference of the interfering satellite to the serving satellite at a future time point. In this way, when it is detected that future interference information is greater than a threshold, the serving satellite may instruct the interfering satellite to disable a corresponding interfering beam or change a beam modulation and coding scheme, so that interference to communication can be reduced, and communication performance can be ensured.

The present application relates to the technical field of signal modulation and coding joint identification, and particularly relates to a modulation and coding joint identification method and system based on a multi-channel attention network, which encodes a modulation information sequence by simulating a communication environment with a randomly generated radio information sequence, generates a digital modulation signal and an analog modulation signal, and assembles signal sample data; constructs a multi-channel convolutional gated deep attention network model for modulation and coding joint identification, and trains and optimizes the multi-channel convolutional gated deep attention network model using the signal sample data; inputs a signal to be identified into the trained and optimized multi-channel convolutional gated deep attention network model, and obtains the modulation and coding category of the signal to be identified using the trained and optimized multi-channel convolutional gated deep attention network model. The present application can improve the efficiency of modulation and coding joint identification, can realize the task of signal modulation and coding joint automatic identification, and is convenient for deployment and implementation.

The present application belongs to the technical field of signal processing. Disclosed are a signal processing method and apparatus, and a device. The method comprises: using an encoding matrix to modulate driving signals sent in parallel by a plurality of TX electrodes, wherein the encoding matrix comprises a full-column-rank matrix of size M×N or a full-row-rank matrix of size N×M, M and N are both positive integers, and M＞N; and using a decoding matrix to decode sensed signals, wherein the decoding matrix is a generalized inverse matrix of the encoding matrix, the sensed signals are obtained by means of sensing by a plurality of RX electrodes, there is coupling capacitance between any RX electrode among the plurality of RX electrodes and each TX electrode among the plurality of TX electrodes, and the coupling capacitance is determined on the basis of the signals decoded by means of the decoding matrix. In the method, when a touch control panel uses a CDM driving mode, driving signals are modulated using a non-square encoding matrix, thereby increasing SNRs of sensed signals generated when the touch control panel uses the CDM driving mode.

Methods, systems, and devices for techniques for dynamically adjusting retransmission opportunities within a connected isochronous stream (CIS) are described. In some aspects, a first wireless device and a second wireless device may support one or more dynamic or “on-the-fly” adjustments to one or more CIS settings in accordance with a link quality between the first wireless device and the second wireless device. For example, the first wireless device and the second wireless device may tie a number of transmission opportunities that are usable for retransmissions, within a given isochronous (ISO) interval, to the link quality between the first wireless device and the second wireless device. The link quality may be tied or associated with a modulation and coding scheme (MCS) of the link. As such, the first wireless device and the second wireless device may tie a dynamic change in MCS to a dynamic change in retransmission opportunities.

The application relates to the technical field of underwater acoustic communication, and discloses a method and system for dynamically allocating resources of an underwater voice communication system. The method comprises the following steps: setting a multi-user priority strategy according to a formation modular grouping; adopting a hybrid access mechanism of fusion of time division multiple access and carrier sense multiple access / collision avoidance, dividing communication channels into inter-group time slots and intra-group time slots, and competing for access to idle sub-carrier clusters in the time slots through a CSMA / CA mechanism; predicting a future state of an underwater acoustic channel; based on the predicted future state, adaptively switching a modulation and coding scheme according to a preset signal-to-noise ratio threshold; distributing sub-carrier bands to users with the largest channel gain based on a channel gain matrix; and combining the multi-user priority strategy, the hybrid access mechanism and the modulation and coding scheme to jointly optimize and distribute sub-carriers, bit loading and transmission power. Through dynamic resource allocation and adaptive transmission optimization, the application effectively improves the resource utilization rate and transmission quality of underwater voice communication.

This invention discloses a PUSCH resource allocation method, comprising: updating the signal-to-interference-plus-noise ratio (SIR) of single-port or two-port PUSCH scheduling; calculating the SIR adjustment amount of single-port or two-port PUSCH scheduling; calculating the total SIR of single-port or two-port PUSCH scheduling; and optimizing single-port and two-port PUSCH scheduling based on a maximum throughput algorithm according to the maximum number of resource blocks T, the total SIR of single-port or two-port scheduling, the demodulation threshold of single-port or two-port scheduling, and the maximum number of resource blocks available during the current PUSCH scheduling, to determine the number of ports, modulation and coding scheme, and maximum number of resource blocks for PUSCH scheduling. This method improves the uplink rate of the terminal and the utilization efficiency of valuable air interface resources, thereby enhancing the user experience.

This invention relates to a modulation and coding scheme and a method, system, device, and medium for predicting spatial stream counts. The method includes: acquiring received signal strength indication data and preset threshold information between at least two access points and a site; determining the synchronous / asynchronous communication status between each access point based on the dynamic relationship between the received signal strength indication data and the preset threshold information; classifying signals transmitted from adjacent access points to the site as interference signals and signals transmitted from adjacent sites as ambient noise based on the synchronous / asynchronous communication status; calculating the signal-to-noise ratio (SNR) of the site based on the signal classification results; inputting the SNR, synchronous / asynchronous communication status, and access point transmit power into a gradient boosting decision tree model; and outputting the modulation and coding scheme and spatial stream count prediction results of the target access point through the gradient boosting decision tree model. This method significantly improves the MCS / NSS prediction accuracy of high-density WLANs.

Methods and apparatuses for downlink and uplink transmissions in full-duplex systems. A method for operating a user equipment (UE) for receiving a physical downlink shared channel (PDSCH) includes receiving: first information for a first modulation and coding scheme (MCS) table associated with a first frequency-domain subband in a reception bandwidth on a cell, second information for a second MCS table associated with a second frequency-domain subband in the reception bandwidth, and third information for a condition. At least one of the first and second frequency-domain subbands is one of a subband full-duplex (SBFD) downlink (DL) subband, an SBFD flexible subband, or an SBFD uplink (UL) subband. The method further includes determining whether the condition is valid for reception in a slot or symbol and receiving the PDSCH in the slot or symbol based on the first MCS table when valid and the second MCS table when not valid.

The present disclosure provides a data transmission method and device, a storage medium and a program product, relates to the technical field of communication, and is beneficial to improving data transmission efficiency. The method comprises the following steps: acquiring a first transport block to be encoded, information bits in the first transport block are configured to adopt a plurality of different modulation and coding modes; determining N second transport blocks according to the first transport block, the information bits in the second transport blocks adopt the same modulation and coding mode, and N is an integer greater than 1; encoding the N second transport blocks respectively, and then performing code block concatenation to obtain a third transport block, wherein the third transport block comprises the N second transport blocks after encoding; and transmitting the third transport block.

A communication method and system for wireless transmission using aggregated physical layer protocol data units (A-PPDUs). An access point (AP) determines an A-PPDU comprising one or more sub-PPDUs, where each sub-PPDU includes a physical layer preamble containing bandwidth information indicating the transmission bandwidth of that sub-PPDU. The bandwidth information may be embedded in a legacy signal (L-SIG) field along with a legacy length (L-length) subfield providing sub-PPDU length. Additional signal (SIG) fields of each sub-PPDU may carry further information including basic service set (BSS) color, station identifiers, modulation and coding scheme (MCS), uplink / downlink identifiers, transmission opportunity (TXOP) values, and padding data. Media Access Control (MAC) fields include receiver and transmitter addresses, which vary depending on whether the A-PPDU is for uplink or downlink transmission, and support multi-link devices (MLDs). Implementations include electronic devices and computer-readable media configured to perform these communication methods for enhanced multi-user and multi-link wireless communication.

The application discloses a SNR-MCS dynamic mapping table design method, and belongs to the technical field of wireless communication, comprising: continuously updating the SNR-MCS dynamic mapping table; outputting the transmission success probability based on the probability prediction model according to the signal-to-noise ratio and the modulation and coding mode; screening the MCS candidate set according to the transmission success probability to construct the MCS prediction model; collecting the actual signal-to-noise ratio to input the MCS prediction model to output the modulation and coding mode, and collecting the transmission feedback to update the data pool; dividing the signal-to-noise ratio into several segments, generating the SNR-MCS dynamic mapping table based on the coverage range of the signal-to-noise ratio of each segment and the MCS prediction model; using the SNR-MCS dynamic mapping table for interaction and updating the data pool; and retraining the probability prediction model through the updated data pool. The application solves the problem of low transmission efficiency and reliability caused by the fact that the prior art cannot adapt to the changing channel conditions.

Methods, systems, and devices for wireless communications are described. The described techniques may enable a transmitting device to perform probabilistic shaping using an energy function that is independent of a modulation and coding scheme (MCS) used by the transmitting device. For example, the transmitting device may encode a set of information bits according to a probability distribution, the energy function, a symbol alphabet, and a shaping parameter. The transmitting device may generate a set of probabilities corresponding to the symbol alphabet based on an energy sequence computed using the energy function, where a quantity of terms in the energy sequence may be based on a shaping order. The transmitting device may indicate the shaping order to a receiving device.

The present invention provides a data transmission method and apparatus, a storage medium, and a program product. The method comprises: acquiring a first transport block to be encoded, wherein information bits in the first transport block are configured to employ a plurality of different modulation and coding schemes; on the basis of the first transport block, determining N second transport blocks, wherein information bits in each second transport block among the N second transport blocks employ a same modulation and coding scheme, and N is an integer greater than 1; separately encoding the N second transport blocks and then performing code block concatenation to obtain a third transport block, wherein the third transport block comprises the encoded N second transport blocks; and transmitting the third transport block.

The application relates to a satellite link dynamic regulation device and method, which comprises an upper layer policy scheduler, a middle layer predictor and a lower layer real-time controller. The upper layer policy scheduler acquires a link state prediction result output by the middle layer predictor and a current link state reported by the lower layer real-time controller, selects an initial strategy, a dynamic regulation strategy or a recovery normal communication strategy according to a task demand, and issues a link parameter configuration instruction. The middle layer predictor uses a pre-trained random forest model to perform link state prediction based on an input feature set extracted in a historical sliding window. The lower layer real-time controller executes transmission power and modulation and coding scheme adjustment according to the instruction, performs emergency regulation when link margin abnormality occurs, and gradually adjusts to a normal communication mode after link recovery. Through the application, dynamic prediction and rapid self-adaptive regulation of a satellite link can be realized.

This invention discloses a joint blind channel estimation and modulation identification method based on adaptive hybrid regeneration, belonging to the field of blind signal processing in communication. This method addresses the problems of error propagation caused by hard-decision regeneration and excessive computational complexity of soft-information regeneration in iterative blind receivers by introducing an adaptive hybrid decision regeneration mechanism into the iterative loop of channel estimation and data detection. This mechanism dynamically sets a threshold based on the confidence level of the posterior log-likelihood ratio output by the decoder, using hard decision for high-confidence information and soft decision for low-confidence information, and adaptively adjusting the threshold based on the target soft decision rate to balance performance and computational overhead. This invention can effectively suppress error propagation under conditions of unknown modulation coding and channel state, achieving reliable joint blind estimation and identification with controllable computational complexity.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A user equipment (UE) includes a transceiver configured to: transmit, to a base station (BS), UE capability information that indicates support for data-aided modulation constellations, wherein the data-aided modulation constellations support a first transmission mode utilizing data symbols for channel estimation, and receive, from the BS, a modulation and coding scheme (MCS) indication. The UE also includes a processor operably coupled to the transceiver and configured to: determine, based on the MCS indication, a first data-aided modulation constellation, and generate first modulation symbols from input bits according to the first determined data-aided modulation constellation. The transceiver is further configured to transmit, to the BS, the first modulation symbols.

The application discloses a UAV long-distance aerial photography data encryption transmission method, and relates to the cross technical field of information security and UAV remote sensing communication. In the process of UAV flight, the original aerial photography image data collected is pretreated and dynamically blocked by the airborne processing unit, and each data block is allocated a unique identification sequence; a session key is generated in real time in combination with wireless channel state information, UAV flight attitude parameters and ground station relative position information; different intensity encryption processing is respectively performed according to the sensitivity of the data block; after the encrypted data block is subjected to priority scheduling, forward error correction coding and adaptive modulation coding, it is sent to the ground receiving end; after the ground receiving end completes integrity check, a selective retransmission request is initiated, and the airborne processing unit only re-executes the encryption and transmission process for the specified data block; after all the data blocks are received, the ground receiving end recombines according to the unique identification sequence, and decrypts and restores by using the session key, and outputs complete aerial photography image data.

A method for automatic management of a wireless access point includes (a) changing a minimum modulation coding scheme of the wireless access point from a first minimum modulation coding scheme to a second minimum modulation coding scheme; (b) determining a first change in performance of the wireless access point in response to changing the minimum modulation coding scheme; and (c) in response to the first change in performance of the wireless access point meeting a first threshold condition, continuing to operate the wireless access point in the second minimum modulation coding scheme.

The invention discloses a modulation coding strategy determination method, electronic equipment and a readable storage medium, and belongs to the field of communication. The method comprises the following steps: acquiring channel quality information of a target communication cell under the condition that the target communication cell provides a group calling service; obtaining a target modulation coding strategy based on the channel quality information; and determining the target modulation and coding strategy as the modulation and coding strategy adopted when the target communication cell provides the group calling service.

Systems, methods, apparatuses, and computer program products for reporting of delta channel quality indicator (CQI) / modulation and coding scheme (MCS) feedback are provided.

This invention discloses a secure transmission method for satellite constellation communication based on post-quantum cryptography, relating to the fields of satellite communication and information security technology. The method includes: analyzing the satellite constellation topology to determine the latency sensitivity level of the secure handshake; pre-screening a set of candidate PQC algorithms based on the sensitivity level; sensing the channel and extracting non-stationary features such as fading depth, duration, and Doppler rate of change; constructing a multi-dimensional joint optimization model with algorithm identifier, fragmentation granularity, redundancy, and modulation and coding scheme as joint decision variables, aiming to maximize the handshake probability within the expected duration; solving the model to generate an adaptive transmission strategy, and performing adaptive non-uniform fragmentation and fountain code encoding on PQC protocol data units; predicting link trends based on Doppler rate of change and dynamically scheduling symbol transmission. This invention achieves deep coupling optimization of network topology, cryptographic algorithms, and channel characteristics, improving the transmission reliability of PQC in dynamic satellite networks.

This disclosure relates to a communication method, a terminal, a network device, and a storage medium. The communication method includes: a terminal receiving first information, the first information indicating a first modulation and coding scheme, the first modulation and coding scheme belonging to a first set of modulation and coding schemes, the first set of modulation and coding schemes including multiple modulation and coding schemes, and the multiple modulation and coding schemes including at least one modulation and coding scheme with a modulation order of 12. This disclosure improves transmission rate.