100results about "Transmission control/equalising" patented technology

The invention discloses an unmanned aerial vehicle anti-collision method and system based on LoRa communication, and belongs to the technical field of risk avoidance of multiple unmanned aerial vehicles. The method comprises the following steps: constructing an ad hoc network communication architecture to realize flight state broadcast and synchronization; fusing the multi-source data by adopting a space-time alignment algorithm, and constructing a dynamic airspace situation map taking a local machine as a center; calculating a time window and space overlapping probability of the predicted intersection; a multi-priority dynamic negotiation protocol is considered, and autonomous decision making of the unmanned aerial vehicle cluster in a scene without a central node is supported; and dynamically adjusting the flight path, speed and height through a collaborative obstacle avoidance algorithm. Through a spread spectrum modulation technology and an adaptive power control mechanism, over-the-horizon communication coverage of more than 10km level is realized; through fusion of a kinematics prediction model and a risk quantification algorithm, millisecond identification and hierarchical response of collision threats are realized, a global optimal avoidance strategy is achieved, communication delay and calculation bottleneck brought by centralized decision are effectively avoided, and the real-time collaborative obstacle avoidance capability in a complex airspace is ensured.

Antenna beam sweeping according to the present disclosure involves different communication devices that are within an interference range of each other transmitting beam sweeping signals using different communication resources. This allows a receiver to distinguish between beam sweeping signals that are received from different transmitters, and may facilitate antenna beam alignment in multi-connection scenarios. Beam indices could be used to identify antenna beams for antenna beam management, in control signaling between base stations and User Equipment (UE), for example. Beam tracking and other aspects of antenna beam management are also disclosed.

Apparatuses, methods, and systems are disclosed for calculating an EVM of a transmitter. One apparatus includes a processor and a receiver that receives a multiple-layer MIMO signal from a transmitter via a propagation channel. The processor measures the received multiple-layer MIMO signal using an unbiased linear MMSE MIMO equalizer and calculates an EVM of the transmitter, where the EVM for each transmission layer is calculated as 100 times the square root of the mean square error of the layer estimate at the output of the unbiased linear MMSE MIMO equalizer.

The objective of the present invention is to provide a wireless communication system that can implement compensation for wireless signals without distinguishing faults in the wireless signals by type. A wireless communication system according to the present disclosure comprises a transmitting station that transmits wireless signals and a receiving station that receives the wireless signals. The receiving station has a compensation circuit that includes a learning model. The receiving station is configured to execute: a process of using the learning model to process input signals and generate output signals, the input signals including received signals at the receiving station that originate from known bit sequences transmitted from the transmitting station; a process of training the learning model such that the output signals approach supervisory data comprising the known bit sequences; and a process of performing processing on a newly inputted input signal on the basis of the trained learning model to output an improved output signal.

The application belongs to the technical field of electric communication, and particularly relates to digital communication, and especially relates to a multi-source data communication system and a communication method, which comprises a general control and a plurality of preprocessing devices; the preprocessing device is connected with a corresponding device, and the device is simultaneously connected with other preprocessing devices; the preprocessing device is configured to receive waveform data sent by the corresponding device, and send peak data in the waveform data to the general control; the general control is configured to mark a preprocessing device to be adjusted when the preprocessing device cannot identify peak data from the waveform data sent by the corresponding device, then the general control controls the remaining preprocessing devices to receive real-time waveform data sent by the device corresponding to the preprocessing device to be adjusted, and the general control adjusts the preprocessing device to be adjusted according to the real-time waveform data, thereby removing a high-precision conversion module and reducing cost.

An O-DU and O-RU in a cellular communication network negotiate frequency resolution to perform equalization and beamforming over the same subcarrier. In one example embodiment, the O-DU sends a message to the O-RU requesting subcarrier information used for performing a beamforming function in the O-RU. The O-DU receives the subcarrier information from the O- RU. The O-DU then uses the subcarrier information received from the O-RU to perform an equalization function.

A control device according to the present disclosure is provided with a control unit. The control unit virtually generates a communication environment for communication conducted between a first communication device and a second communication device via a third communication device. The control unit determines control information, for controlling the third communication device, on the basis of the virtual communication environment. The control unit transmits the control information to the third communication device.

In a general aspect, a communication system comprises a first station and a second station. Each station includes a transceiver and a control subsystem. The transceiver includes having one or more photonic crystal masers and one or more photonic crystal receivers. The control subsystem includes one or more lasers optically coupled to the one or more photonic crystal masers and the one or more photonic crystal receivers. The control subsystem also includes modulation electronics in communication with the one or more lasers and configured to control one or more properties of a first input optical signal received by each photonic crystal maser. The control subsystem additionally includes demodulation electronics in communication with the one or more lasers and configured to control one or more properties of a second input optical signal received by each photonic crystal receiver.

The present disclosure provides an interference suppression method and apparatus and a storage medium. The interference suppression method comprises: performing uplink transmission in a downlink time slot by using first uplink transmit power, the first uplink transmit power being maximum uplink transmit power supported and used by a terminal under a first power level corresponding to the type of the terminal; or increasing the transmit power level of the terminal from the first power level to a second power level; and performing uplink transmission in the downlink time slot on the basis of the second power level. According to the present disclosure, the power of uplink transmission of the terminal is increased, such that when a full-duplex terminal performs uplink transmission in a downlink time slot, downlink self-interference from a serving base station and cross time slot interference from an adjacent base station of the serving base station are reduced, the reliability of uplink transmission is improved, and the feasibility of enhancing full-duplex communication is improved.

The present disclosure proposes a method for getting a binary sequence representing the sampling of an underlying binary code sequence. The proposed approach builds the target sequence by concatenating sets of samples taken from another reference sequence representing the sampling of the same underlying code but at different sampling rate and / or initial phase than the target sequence. The main idea is that both the target and the reference sequences share sets of samples that are common, sample by sample, in both sequences, so that such sets of samples can be reused to build the target sequence, and, at each transition between sets, one or several reference samples must be either duplicated or discarded. The present disclosure explains how to compute the indexes of those common sets and shows how the samples at the transitions need to be managed. The main advantage of this approach is to allow computational savings.

The invention relates, among other things, to a network device (10, 11, 12) for an intercom network (13) for enabling audio communication, in particular duplex audio communication, with other participants (14a, 14b, 14c, 14d, 14e, 14f) of the intercom network, comprising a housing (33) and a communication module (20a, 20b) arranged therein or thereon, with which a radio connection for transmitting audio signals to another participant can be established, wherein the radio connection is subject to the DECT protocol. A particular feature is that the network device (10, 11, 12) has a device (21) for preventing or reducing multipath interference.

The embodiment of the application discloses a traffic distribution method and device for an aggregated link, an optical line terminal (OLT) and a medium. The traffic distribution method for the aggregated link comprises the following steps: predicting a predicted average rate of a port in a current monitoring period and a rate average value of a plurality of ports based on port traffic of the port in a monitoring period, wherein the rate average value is an average value of the predicted average rate; and adjusting port traffic of a to-be-adjusted port in the current monitoring period to an adjusted port according to a load sharing element, wherein the load sharing element comprises preset message length intervals of different rates in the port traffic, the to-be-adjusted port is a port with a predicted traffic rate greater than the rate average value, and the adjusted port is a port with a predicted traffic rate less than the rate average value. The traffic of each physical port of the aggregated link can be dynamically distributed, the load difference of each physical port is reduced, and resource waste is reduced.

The present disclosure relates to a 5G communication system or a 6G communication system for supporting higher data rates beyond a 4G communication system such as long term evolution (LTE). The present disclosure relates to the field of a wireless communication system. More particularly, the present disclosure relates to method, apparatus(or device) and system for restricting channel estimation in the time domain for downlink transmission in a wireless communication system. A main technical result consists in enabling more flexible MU-MIMO scheduling in the time domain, including capabilities for more flexible channel estimation restrictions in the time domain, which ultimately leads to improved communication performance between the BS and the UE. Base station - implemented method of communication with one or more user equipments, the method comprising: defining possible values of a parameter of time interval of channel estimation performed by one or more UEs using one or more demodulation reference signals (DMRSs) for receiving a physical downlink shared channel (PDSCH); transmitting, using downlink control information (DCI) signaling, to the one or more UEs an indication of a scheduled PDSCH transmission and an indication of a to-be-applied value of said parameter from among the possible values of the parameter; and performing the scheduled PDSCH transmission to the one or more UEs.

A method (100) for determining operating parameters (vk*, u*) a pre-encoder phase and a combiner phase of a transmitter (500) or a receiver (600) configured for over-the-air computing, includes determining (130) a first combiner (u (0) ) based on an aggregated channel matrix (H) containing all channel vectors (h k )) of all transmitters (500). The procedure further includes the iterative refinement (101) of the combiner ( U (i i) ), until a termination criterion is met, resulting in an optimized combiner (u*). Based on the previously optimized combiner (u*), optimized precoder parameters are calculated. (vk * ) calculated for all transmitters (500) (190), while ensuring that the square (|v k | 2 ) the precoding scalar of each transmitter (500) does not exceed a predetermined power value (P).

Provided are backscatter communication method, apparatus and device, and a storage medium. The backscatter communication method applied to a first communication node includes: (S110) determining a target position situation used to carry first information, and (S120) performing backscatter communication according to the target position situation.

Methods and systems for orthogonal time frequency space (OTFS) communication using predefined basis signals are described. An example digital communication method includes receiving a signal over a communication channel, determining an estimate of the communication channel from one or more pilot symbols in the signal transmission. Herein the one or more pilot symbols are assigned along a delay-Doppler resource grid. The method further includes equalizing non-pilot symbols in the signal transmission by rotating the estimate of the communication channel according to grid locations of the one or more pilot symbols along the delay-Doppler resource grid at other grid locations, and recovering data bits from the equalized non-pilot symbols.

Apparatuses, methods, and systems for computing an EVM of a transmitter are disclosed. One apparatus includes a processor and a receiver that receives a multi-layer MIMO signal from a transmitter via a propagation channel. The processor measures the received multi-layer MIMO signal using an unbiased linear MMSE MIMO equalizer and computes an EVM of the transmitter, where the EVM of each transmission layer is computed as 100 times the square root of a mean square error of a layer estimate at an output of the unbiased linear MMSE MIMO equalizer.

This invention discloses a radar-communication integrated antenna beam coordination optimization method and system based on big data, belonging to the field of radar communication technology. The method includes the following steps: acquiring electromagnetic energy distribution signals, target motion trajectory signals, and communication signal power timing signals during rapid changes in the target scene; expanding these three types of real-time signals under a unified time reference to establish a dynamic characteristic basis reflecting beam response lag; and continuously analyzing the time misalignment relationship between radar echo energy change signals and communication power timing signals based on the established dynamic characteristic basis. This invention restores the master-slave correspondence between radar transmission and echo sampling through time reference unification and timing coordination adjustment, reducing energy misalignment and detection distortion in dynamic scenarios. Furthermore, by allocating communication power in a segmented timing sequence, it achieves staggered release of radar and communication energy, reducing mutual interference and improving the overall sensing and transmission stability in complex electromagnetic environments.

Apparatuses, methods, and systems are disclosed for calculating an EVM of a transmitter. One apparatus (600) includes a processor (605) and a receiver (635) that receives (905) a signal (210) via a propagation channel from an antenna port (207) at a transmitter (205), the antenna port (207) comprising multiple antennas and with an antenna connector for each antenna. The processor (605) measures (910) the received signal (210) using an unbiased linear MMSE equalizer (230) and calculates (915) an EVM of the antenna port, where the EVM is calculated as 100 times the square root of the mean square error of the symbol estimate at the output of the unbiased linear MMSE equalizer (230).

A method for operating a wireless ecosystem involves connecting electronic devices, each containing a wireless communication module, to a wireless hub and querying the electronic devices with incremental variations of the wireless hub's transmission power to determine a reduced hub transmission power sufficient for communication with the multitude of electronic devices. The method also involves providing each of the electronic devices with an allocated wireless transmission power for communication with the wireless hub and transmitting the allocated wireless transmission power from the wireless hub to each of the electronic devices for communication with the wireless hub.

This equalization device: executes equalization processing which is processing for equalizing an input signal and generating an output signal, error calculation processing for calculating the difference between the output signal and a symbol determination signal based on the input signal, and outlier determination processing for determining, on the basis of the absolute value of the difference and a prescribed threshold, whether or not the input signal is an outlier; and does not update a tap coefficient in the equalization processing when it is determined that the input signal is an outlier in the outlier determination processing.

The application discloses a radio frequency unit power control method, electronic equipment and storage medium, and belongs to the communication technical field.The method comprises the following steps: acquiring utilization state information of a unit channel of a radio frequency unit; and adjusting a current switch state of the unit channel to a target switch state according to the utilization state information.The technical scheme of the application adjusts the current switch state of the unit channel of the radio frequency unit to the target switch state according to the utilization state information by acquiring the utilization state information of the unit channel of the radio frequency unit, so that the switch state of the unit channel of the radio frequency unit is adaptively adjusted according to the utilization state information of the unit channel, the user experience is not affected, and the effect of saving energy and reducing consumption of the radio frequency unit is achieved.

The present invention discloses a method for distinguishing waveguide / scattering modes based on evaporation waveguide height. The method includes: setting an interval to which the evaporation waveguide height critical value belongs when the radio wave communication mode switches, and setting a threshold value for the interval length; using the midpoint of the interval as the initial value of the evaporation waveguide height critical value; judging whether the interval length exceeds the threshold value: if the interval length is greater than the threshold value, performing an iterative calculation; calculating the horizontal coordinate of the intersection of the radio wave propagation loss under the evaporation waveguide and tropospheric scattering modes; obtaining a final value of the critical value through iterative calculation; obtaining a predicted evaporation waveguide height value, and comparing it with the final value. If the predicted evaporation waveguide height value is less than the final value, it indicates tropospheric scattering; otherwise, it indicates evaporation waveguide. The present invention distinguishes the mode of over-the-horizon communication at sea based on the evaporation waveguide height critical value, is more adaptable to the continuous switching of communication modes, and provides guidance for adjusting and optimizing communication system parameters to improve performance.

Disclosed is an analog equalizer network apparatus for wideband LOS-MIMO processing, the apparatus according to an embodiment including: a power distributor configured to distribute a first input signal received through a receiving antenna of a wideband LoS-MIMO network to a first path from a first input terminal to a first output terminal, and distribute a second input signal received through the receiving antenna to a second path from a second input terminal to the first output terminal; a first delay line located on the first path, and configured to delay the first input signal distributed to the first path; a second phase shifter located on the second path and configured to shift a phase of the second input signal distributed to the second path; and a power combiner configured to combine the delayed first input signal and the phase-shifted second input signal to perform channel separation.

An apparatus includes a receiver. The receiver includes a plurality of receive channels, and each of the receive channels is configured to receive a radio frequency (RF) signal. The apparatus also includes at least one processing device configured to perform pulse compression on a plurality of RF signals received via the plurality of receive channels and generate pulse-compressed RF signals. The at least one processing device is also configured to perform Doppler filtering on the pulse-compressed RF signals and generate Doppler-filtered RF signals, convert the Doppler-filtered RF signals into a plurality of beams using beamforming, and apply an equalization weight from a plurality of equalization weights to each beam of the plurality of beams.

A communication apparatus performs to: receive, from a transmitter, a backoff change amount indicating an amount by which a backoff amount of the transmitter has changed from a reference value, and a transmission signal transmitted by the transmitter; and compensate for distortion of the transmission signal using a compensation model for use in processing to compensate for the distortion of the transmission signal transmitted from the transmitter, the compensation model being determined based on the backoff change amount.

Methods and systems are described for orthogonal time-frequency-space (OTFS) communication using a predefined base signal. An example digital communication method includes receiving a signal over a communication channel, determining an estimate of the communication channel from one or more pilot symbols in the signal transmission. One or more pilot symbols are allocated along a latency-Doppler resource grid herein. The method further includes equalizing non-pilot symbols in the signal transmission by rotating an estimate of the communication channel at other grid positions according to grid positions of one or more pilot symbols along the delay-Doppler resource grid, and recovering data bits from the equalized non-pilot symbols.

To provide a wireless communication system that performs tap coefficient pulling-in processing of a decision feedback adaptive equalizer at a high speed.SOLUTION: A wireless communication system performs: a first process in which a data frame DF_B is transmitted from a station B at timing delayed by an offset symbol number M of a symbol number B the same as a synchronization word SW_A in response to a data frame DF_A transmitted from a station A, and a tap coefficient is pulled in for a combined data frame DF_A+DF_B obtained by combining the data frames DF_A and DF_B; a second process of performing an equalization process based on equalizer input and the tap coefficient to obtain an approximation value of a symbol of block data contained in combined block data as equalizer output; and a third process of calculating an error between a hard decision value of the equalizer output and the equalizer output, and updating the tap coefficient to the latest value using the calculated error, the tap coefficient, and new equalizer input. The wireless communication system repeats the second process and the third process until all approximations of the symbol of the block data are output.SELECTED DRAWING: Figure 7