754results about "Error prevention/detection by diversity reception" patented technology

The invention discloses an unmanned aerial vehicle cluster intelligent cooperative control method, and the method comprises the steps: optimizing a network topology through heterogeneous unmanned aerial vehicle cluster dynamic networking and a dynamic clustering algorithm, and guaranteeing the reliability of a communication link; a layered hybrid decision architecture is designed to improve the task allocation rationality and the dynamic adaptability of the unmanned aerial vehicle cluster; a distributed control strategy network is trained by using a multi-agent near-end strategy optimization MA-PPO algorithm, and unmanned aerial vehicle cluster behavior collaboration is ensured in combination with space-time consistency constraint; an asynchronous incremental consensus protocol AICP is provided, the data transmission amount is reduced, and topology reconstruction is accelerated; real-time three-dimensional environment reconstruction and dynamic threat prediction are realized based on a neural radiation field NeRF technology; a lightweight anti-interference communication middleware is developed, and the instruction transmission stability is enhanced by adopting a space-time coding diversity technology. The method solves the problems of high delay of centralized control of the unmanned aerial vehicle cluster, poor convergence of a distributed algorithm and the like, and is suitable for high-dynamic task scenes such as urban street battle and complex terrain search.

A wireless transmit / receive unit (WTRU) may include a processor that is configured to receive configuration information indicating a plurality of sub-bands for cross-link interference (CLI) measurements and respective resources for performing CLI measurements for each of the plurality of sub-bands. The processor may receive a downlink control information (DCI) indicating resources associated with a first reference sub-band. The processor may perform a CLI measurement for the first reference sub-band using one or more resources for performing CLI measurements for the first sub-band. The processor may perform a CLI measurement for at least one other sub-band of the plurality of sub-bands using the respective resources for CLI measurements of the at least one other sub-band based on determining that the CLI measurement for the first sub-band is greater than a threshold. The processor may send an indication that the CLI measurement for the sub-band is greater than the threshold.

The invention relates to an underwater optical communication LDPC (Low Density Parity Check) coding processing method. The method comprises the following steps: determining a current channel quality grade based on a real-time communication distance and channel state information; dynamically selecting LDPC (Low Density Parity Check) coding parameters and modulation orders in combination with equipment mobile data and channel quality levels, and generating an adaptive parameter combination; performing error correction coding on the data according to the selected parameters and generating an optical communication signal; transmitting to a receiving end through an optical channel; and dynamically updating the coding parameter and the modulation order based on the feedback information of the receiving end. According to the method, the problem that a traditional fixed coding scheme is insufficient in error correction capability or wastes resources in a dynamic distance scene is solved by predicting the equipment moving trend and the channel state in real time and adaptively adjusting the coding parameters and the modulation mode, the error rate is remarkably reduced, the communication efficiency is improved, and the method is suitable for a complex and changeable underwater optical communication environment.

The disclosure provides a wireless communication system, comprising at least one DCS with a surface that comprises scattering elements having a controllable phase shift, at least one transmitter configured to transmit a coded radiofrequency signal to at least one receiver during a plurality of time slots, and a controller. The controller controls the at least one transmitter, based on a space time DCS code (STDC) to generate the coded radiofrequency signal during the plurality of time slots. The controller further controls, based on the STDC, the set of scattering elements of the at least one DCS during the plurality of time slots. The STDC depends on a total number of the at least one DCS and a maximum number of the plurality of time slots Tmax.

The invention discloses a multi-path cooperative communication method, belongs to the technical field of wireless communication, and is used for solving the problems of inaccurate path selection, unreasonable power distribution and inaccurate signal combination caused by dynamic change of a channel state in multi-path communication. The method comprises the following steps: acquiring channel state information of at least three communication paths in real time through a transmitting end, wherein the channel state information comprises signal strength, frequency offset and noise power spectral density; dynamically dividing and distributing the data stream to each path based on the path quality factor, and adjusting the transmitting power by combining the signal strength and the noise difference value; a receiving end carries out time domain alignment by adopting a sliding window cross-correlation algorithm, and carries out phase compensation based on a minimum mean square error criterion; path reallocation is triggered when the continuous bit error rate exceeds a threshold. According to the method, the multi-path resource utilization rate can be optimized, and the communication stability and the data transmission efficiency are improved.

A first wireless device receives, from one or more second wireless devices, a plurality of sidelink control information (SCIs). The plurality of SCIs indicate physical sidelink shared channel (PSSCH) receptions and physical sidelink feedback channel (PSFCH) transmissions. Each of the PSFCH transmissions is associated with a respective sidelink reference signal. The first wireless device determines: a sidelink reference signal associated with a first PSFCH transmission with a smallest priority value among priority values of the PSFCH transmissions; and one or more first PSFCH transmissions, comprising the first PSFCH transmission, associated with the sidelink reference signal from the PSFCH transmission. The first wireless device transmits, in a PSFCH occasion of a sidelink slot, at least one of the one or more first PSFCH transmissions.

The invention provides a diversity communication method and a diversity communication device, which are used for providing a diversity transmission scheme. The first device maps a plurality of modulation symbols corresponding to one transmission block to a plurality of antenna ports; in each mapping, a plurality of consecutive modulation symbols are mapped onto one antenna port. And then, the first equipment maps the modulation symbols on each antenna port to the frequency domain resources corresponding to the antenna ports, and the frequency domain resources corresponding to different antenna ports are not overlapped. Due to the fact that frequency domain resources corresponding to different antenna ports are not overlapped, that is, one transmission block is transmitted on different channels, the transmission block achieves the purpose of diversity transmission. Moreover, when the modulation symbols are mapped to the antenna port, a plurality of continuous modulation symbols are mapped each time, and the mapping mode can keep the phase difference among the plurality of continuous modulation symbols not damaged, so that the communication system can keep a relatively low peak-to-average power ratio (PAPR).

A channel state information determination method and device, in the method, a network device determines N rows of base vectors corresponding to N time units based on mobile state information and a channel map of a terminal device, each row of the N rows of base vectors comprises X base vectors, and the channel map is used for indicating channel characteristics based on a location area; the network equipment sends first indication information, wherein the first indication information is used for indicating N rows of base vectors; the network equipment respectively sends pilot signals in N time units; the network equipment receives second indication information, the second indication information is used for indicating weighting coefficients of Y base vectors in the X base vectors, and the weighting coefficients of the Y base vectors are determined based on the pilot signal; and the network equipment determines channel state information corresponding to M time units based on the weighting coefficients of the Y base vectors and the N rows of base vectors, and the M time units comprise N time units. The method can improve the accuracy of the channel state information.

A method for indicating layer mapping of a code word (CW), performed by a terminal, includes: determining and enabling a target layer mapping scheme, wherein the target layer mapping scheme comprises a Type-1 layer mapping scheme or a Type-2 layer mapping scheme; wherein a maximum value of difference between numbers of layers corresponding to two CWs after layer mapping based on the Type-1 layer mapping scheme is different from a maximum value of difference between numbers of layers corresponding to the two CWs after layer mapping based on the Type-2 layer mapping scheme.

The invention provides a TOF (Time of Flight) estimation method of a matrix bundle based on partitioning and random SVD (Singular Value Decomposition). The method comprises the following steps: firstly, acquiring channel state information (CSI) by using a commercial WiFi device, and constructing a CSI matrix; and secondly, performing block overlapping processing on the CSI matrix, constructing an augmented matrix for each CSI data block, and performing SVD decomposition on the augmented matrix, thereby reducing the calculation complexity of SVD decomposition. And then, the time of flight (TOF) of each CSI data block is estimated by using a matrix pencil algorithm, and the minimum TOF is direct path estimation. According to the method designed by the invention, the robustness of the system and the estimation precision of the TOF are improved under the condition that the algorithm complexity is greatly reduced.

The invention provides an unmanned aerial vehicle cluster polarization-space-time coding anti-interference communication system based on dynamic topology reconstruction, and the system integrates five functional subsystems, namely an environment perception subsystem, a topology reconstruction subsystem, a polarization regulation and control subsystem, a space-time coding subsystem and a resource scheduling subsystem, and carries out the unified coordination through a decision control center based on a multi-objective optimization algorithm. And closed-loop adaptive control is formed. The system can accurately sense interference source information, channel state and cluster dynamic state in real time; according to a sensing result and a task demand, dynamically optimizing and adjusting a communication topological structure of the cluster, and actively avoiding a strong interference area; meanwhile, the polarization state of the signal is adaptively selected and controlled so as to match a channel and suppress interference; and a reconfigurable space-time coding scheme is adopted, and coding parameters are flexibly adjusted to adapt to changing channel and interference conditions. And the communication anti-interference capability, the data transmission reliability and the energy utilization efficiency of the unmanned aerial vehicle cluster in a complex electromagnetic environment are obviously enhanced.

Methods and apparatuses for are NTN IoT HARQ disabling for HARQ bundling and multiple TB scheduling disclosed. A UE comprises a processor; and a transceiver coupled to the processor, wherein the processor is configured to receive, via the transceiver, a control signal scheduling transport block(s), where each of the transport block(s) is associated with an HARQ process with HARQ feedback enabling or an HARQ process with HARQ feedback disabling according to an HARQ indication; and receive, via the transceiver, the transport block(s) based on the control signal.

A transmission method intended for an OMAMRC telecommunication system with M sources (s1, . . . , sM), possibly L relays and one destination, M≥2, L≥0. In such a solution, when a source could not be decoded by the destination, the latter organises a retransmission by taking into account the characteristics of a MIMO transmission channel established between, on the one hand, at least two nodes that decoded the source and, on the other hand, at least two antennas in reception of the destination in the form of a precoding coefficient. Thus, the method therefore makes it possible to improve the decoding performance of a source si, in a context where the destination is equipped with a plurality of antennas in reception.

This disclosure provides methods, components, devices and systems for communications for fast link adaptation (FLA). In some examples, a transmitter may transmit an FLA information request via a physical layer (PHY) protocol data unit (PPDU). The PPDU may include an FLA information request indicating that the receiver is to report one or more parameter values (such as proposed updates to current parameter values) for a currently used quantity of spatial streams. In some examples, the PPDU may include (such as in a media access control (MAC) header) a bit which can be turned on to request a second FLA element indicating one or more parameters for a proposed (such as, updated) quantity of spatial streams.

The application discloses a kind of method for determining channel parameter, device, equipment and storage medium, the method includes: based on data sending end, the target transmission power of monitoring bandwidth is determined;The data sending end detects the state information of data receiving end, then the data sending end determines the bandwidth to be selected matched with the data receiving end, and obtains the target SNR of each the bandwidth to be selected;The data sending end obtains the reference MCS set of each the bandwidth to be selected based on the target SNR;The data sending end obtains the target throughput of each the bandwidth to be selected based on the reference MCS set;The data sending end determines the working throughput based on the target throughput of each the bandwidth to be selected, and determines working bandwidth and working rate based on the working throughput.The technical scheme of the application can determine the working bandwidth and corresponding working rate that obtain the maximum throughput.

The present invention discloses a central gateway, an in-vehicle communication system, and a vehicle, wherein the central gateway is configured to be connected between a DC power supply module and at least one zone control device, and the central gateway comprises: a power supply control module, wherein the power supply control module is connected on one side to a first power supply cable, wherein the first power supply cable serves to connect to the DC power supply module, and wherein the power supply control module is connected on the other side to at least one second power supply cable, wherein the second power supply cable serves to connect to the zone control device, and wherein the power supply control module is configured to transmit the DC power provided by the DC power supply module to the zone control device via the second power supply cable,wherein the second power supply cable comprises a section for transmitting direct current and a combined cable section transmitting both communication signals and direct current; a low-pass filter arranged between the power supply cable section and the combined cable section within the same power supply control module.

This application discloses an information transmission method and apparatus, and a communication device. The information transmission method in embodiments of this application includes: A first device measures a first signal to obtain a first result corresponding to each receiving unit. The receiving unit includes a receiving antenna or a receiving channel. The first signal includes at least one of a reference signal, a synchronization signal, a data signal, and a special signal. The first device sends a first message. The first message includes at least one first result satisfying a first condition or at least one second result satisfying a second condition. Each second result is obtained by performing target operation processing on first results corresponding to two receiving units. A target operation is a division operation or a conjugate multiplication operation.

A communication method and apparatus. A terminal device determines channel state information based on S indexes of S vectors. Each of the S vectors is included in a first vector quantization dictionary. The first vector quantization dictionary includes N1 vectors, where N1 and S are both positive integers. The terminal device sends the channel state information to a network device. Because a vector included in the vector quantization dictionary usually has a relatively large dimension, quantizing channel information by using the first vector quantization dictionary is equivalent to performing dimension expansion on the channel information or maintaining a relatively high dimension. High-precision feedback is implemented by using relatively low signaling overheads.

The invention relates to the technical field of indoor positioning, in particular to a millimeter wave CSI (Channel State Information) indoor positioning method and system based on a generative adversarial network, and millimeter waves are large in bandwidth, narrow in beam, high in time resolution and space angle resolution and capable of reducing the influence of a multipath effect. Position estimation is directly obtained from CSI data directly obtained in the millimeter wave communication process, complex signal processing and filtering steps of obtaining other parameters from CSI are avoided, and the system calculation complexity is greatly reduced. The information of the AP position is extracted from the high-dimensional observation vector by using the generative adversarial network, so that complex positioning algorithms such as Kalman filtering or graph optimization are avoided, and the calculation complexity is reduced; according to the method, AP position estimation is obtained through confrontation training of the generator and the discriminator, position coordinates of reference points do not need to serve as labels, input data are all label-free data, dependence on marked data is avoided, and prior knowledge such as the AP or the reference points is not needed.

The invention discloses a near-field channel state information feedback method under a super-large scale array based on Transform, which comprises the following steps: in a downlink XL-MIMO system in a near-field area, a user side performs two-dimensional matrix processing on acquired CSI data and transmits the processed CSI data to a coding end; two-channel coding compression is carried out on the CSI matrix, a first channel uses an encoder to extract channel related characteristics, and a second channel enables an original CSI matrix to pass through a linear network so as to reserve original information; compressing the output of the two channels, and splicing to generate a low-dimensional code word to be fed back; the base station side decoding end splits the low-dimensional code word and decompresses the low-dimensional code word of the corresponding channel; decompressed dual-channel code words are respectively input to two ends of a decoder; and carrying out size change on the output of the decoder to obtain the estimated original CSI. According to the method, angle and distance information of a near-field channel is fully utilized, and efficient CSI compression and high-precision reconstruction are realized.

A method and system are provided for scheduling data transmission in a Multiple-Input Multiple-Output (MIMO) system. The MIMO system may comprise at least one MIMO transmitter and at least one MIMO receiver. Feedback from one or more receivers may be used by a transmitter to improve quality, capacity, and scheduling in MIMO communication systems. The method may include generating or receiving information pertaining to a MIMO channel metric and information pertaining to a Channel Quality Indicator (CQI) in respect of a transmitted signal; and sending a next transmission to a receiver using a MIMO mode selected in accordance with the information pertaining to the MIMO channel metric, and an adaptive coding and modulation selected in accordance with the information pertaining to the CQI.

Systems and methods related to prioritization of non-zero coefficients for Channel State Information (CSI) for Coherent Joint Transmission (CJT) are disclosed. Embodiments of a UE and corresponding embodiments of a method performed by a UE for CJT CSI feedback in which non-zero coefficients of a precoding matrix indicator (PMI) feedback are prioritized are disclosed. Embodiment of a network node and corresponding embodiment of a method performed by a network node for CJT CSI feedback in which non-zero coefficients of a PMI feedback are prioritized are also disclosed.

An electronic device (such as an access point) is described. This electronic device transmits an orthogonal frequency division multiple access (OFDMA) frame to a recipient electronic device (such as a client or a station). The OFDMA frame includes multiple predefined resource units (RUs) allocated to the recipient electronic device in a set of predefined RUs having associated frequency bandwidths. Moreover, the multiple predefined RUs include two or more first predefined RUs having a first number of tones less than a predefined amount, or two or more second predefined RUs having a second number of tones greater than or equal to the predefined amount. For example, the predefined amount may include 242 tones. Note that the multiple predefined RUs may have the same or different numbers of tones. Moreover, the electronic may receive an acknowledgment or a block acknowledgment from the recipient electronic device.

Disclosed are a method and device for transmitting and receiving a downlink channel on the basis of blind decoding in a wireless communication system. A method for a terminal to decode a downlink channel in a wireless communication system according to an embodiment of the present disclosure comprises: a step for transmitting capability information associated with one or more first monitoring schemes among a plurality of monitoring scheme candidates to a base station; a configuration information reception step for receiving configuration information about a second monitoring scheme among the plurality of monitoring scheme candidates from the base station, the complexity of the second monitoring scheme being no greater than that of the one or more first monitoring schemes; and a step for monitoring and decoding the downlink channel on the basis of the configuration information, wherein the plurality of monitoring scheme candidates may include a combined blind decoding (BD) scheme for the repeated transmission or split transmission of the downlink channel on a plurality of monitoring occasions (MO).

Certain aspects of the present disclosure provide techniques for a probabilistic constellation shaping (PCS) scheme for multiple layer transmissions. An example method includes obtaining a configuration for performing a PCS modulation scheme, identifying a set of bits corresponding to a transport block for communication via the multi-layer transmission, performing distribution matching on the set of bits using a set of parameters indicated in the configuration to obtain a set of distributed symbols, converting the set of distributed symbols into a set of distributed bits, encoding the set of distributed bits to obtain an encoded set of distributed bits, performing a modulation procedure on the encoded set of distributed bits in accordance with the PCS modulation scheme to obtain a set of modulation symbols corresponding to a codeword associated with the transport block, and transmitting, to a receiving device, the codeword, including the set of modulation symbols, via the multi-layer transmission.

The invention discloses a channel state information prediction method and device based on a large language model, and the method comprises the steps: obtaining and preprocessing a historical channel state information (CSI) sequence, and obtaining a CSI time feature; through a cross attention mechanism, embedding the CSI time features (as queries) and pre-training words of LLM into a dictionary (as keys and values) to carry out cross-modal semantic alignment, mapping the CSI features into a semantic space of the LLM, and fusing the CSI features with original features to generate fused channel features; and finally, inputting the fused features into LLM for inference, and generating final predicted CSI through a projection layer. According to the method, a modal gap is effectively bridged, the powerful sequence modeling capability of a large language model can be fully utilized, the accuracy and generalization capability of channel prediction are remarkably improved, and an effective technical approach is provided for overcoming the channel aging problem in wireless communication.

The invention relates to the technical field of communication, in particular to a transmission layer ultra-low delay congestion control method assisted by physical layer information. The core of the method is as follows: a sending end continuously acquires physical layer channel quality information and predicts a future channel capacity change trend based on historical and current information sequences; and then, dynamically calculating and smoothly adjusting the size of a transmission layer congestion window through a predefined mapping relation according to a prediction result, actively reducing the window before predicting that the channel is deteriorated, and timely increasing the window when the channel is improved. In addition, the method also comprises a fault-tolerant mechanism, and automatically switches to a traditional congestion control mode when the prediction is misaligned by monitoring the deviation between the prediction and the reality. Through cross-layer information utilization and prospective control, the method aims to effectively reduce data transmission delay and jitter and improve the capability of a network to cope with channel dynamic changes and the overall stability.

According to the communication method provided by the invention, resources used by each antenna port group in each measurement are indicated or predefined by a protocol through resource configuration information, so that K resources used by each measurement in M channel state measurements for forming K antenna port groups can be determined according to the resource configuration information. Furthermore, K * M resources for performing M times of channel state measurement on the K antenna port groups can be determined, namely, the resources used by the K antenna port groups in each time of channel state measurement in Doppler measurement are determined, so that M times of channel state measurement is performed on the K antenna port groups. Besides, the terminal equipment can also determine the shortest time in K * Z'ref or the preset longest time Zmax from the end of the measurement of the K antenna port groups to the start of reporting the CSI report, thereby not only perfecting a resource configuration scheme for the AP CSI-RS Doppler measurement of a larger port, but also determining the time from the end of the measurement of the large port to the start of reporting the CSI report.

The invention discloses a single-channel received RIS direction of arrival estimation method, and relates to the technical field of wireless sensing, and the method comprises the steps: mapping a space-time coding matrix into a control signal, and loading the control signal to periodically arranged electromagnetic units of an RIS, thereby carrying out the space-time coding modulation of an incident signal, and forming a reflection signal comprising angle information; receiving the reflected signal by a single-channel receiving end and converting the reflected signal into baseband data, performing Fourier transform on the baseband data to obtain a frequency domain component, and constructing a plurality of virtual receiving channels; and constructing a covariance matrix based on the signal of the virtual receiving channel, performing eigenvalue decomposition on the covariance matrix, constructing a spatial spectrum function, and performing peak search on the spatial spectrum function to obtain the direction of arrival of the incident signal. The invention further discloses a single-channel receiving RIS direction of arrival estimation system, high-precision direction of arrival estimation under the single-channel receiving condition is achieved, and the system has the advantages of being simple in system structure, low in hardware cost, high in algorithm resolution and high in anti-noise capacity.

An apparatus may include a transmitter and one or more processors configured to identify a code rate of a low-density parity-check (LDPC) code, receive, by an LDPC encoder, a set of information bits and encode, using the code rate, the set of information bits to generate a set of encoded bits and a set of parity bits, generate, from the set of encoded bits, a matrix of bit arrays, discard one or more parity bits from the set of parity bits to generate a parity bit array with a size equal to a number of column of the matrix, generate a bit array by concatenating (1) one or more bit arrays selected from the matrix of bit arrays and (2) one or more bits selected from the parity bit array corresponding to the one or more bit arrays, and modulate, by a modulator, the bit array to generate modulated data.