10 results about "Pilot power" patented technology

The invention discloses a channel estimation method, related equipment, a storage medium and a computer program product. The method comprises the steps that a sending device determines a first symbol and first information, the first symbol is used for indicating semantics of an information source, and the first information is used for indicating the importance degree of the first symbol on information source reconstruction; in the process of superposing a second symbol to the first symbol, power is allocated for the first symbol and the second symbol based on the first information, and the second symbol is used for channel estimation; and sending the superposed first symbol to a receiving device through a first channel, the first channel having at least the characteristics of time selective fading and frequency selective fading. According to the technical scheme provided by the invention, under the scene of double selective channels, the pilot symbols are superposed on the semantic symbols, and the distribution of the pilot power is dynamically adjusted in combination with the importance of the semantic symbols, so that more accurate channel estimation and stronger anti-interference capability can be realized.

A method includes receiving, by a user equipment (UE), a first message from a network apparatus, the first message including configuration information for superimposed pilot (SIP) transmission including a configuration for pilot power transmission and data power transmission, determining, by the UE, the uplink (UL) pilot power and UL data power for SIP transmission based at least on the configuration information, generating, by the UE, an SIP uplink (UL) transmission based at least on UL pilot power and data power, and transmitting, by the UE, the SIP UL transmission to the network apparatus.

Systems and methods for implementing a continuous current monitor based on a low-side pilot power device is generally described. The semiconductor device includes a first circuit to filter an output signal from a power stage to generate a filtered signal that is coherent with an inductor current through an inductor in the power stage, a second circuit to generate a calibration code, and a third circuit to monitor current from a pilot device integrated in a low-side device of the power stage. The first circuit can calibrate the filtered signal to generate a calibrated signal based on the calibration code and the current from the pilot device. The second circuit can adjust the calibration code based on the calibrated signal. A combination of samples corresponding to the calibrated signal and samples corresponding to the current from the pilot device can recreate the inductor current.

The invention discloses an MIMO system pilot frequency power distribution and signal design method, a storage medium and a product, and belongs to the technical field of wireless communication. According to the method, the characteristic of MIMO channel space sparsity is fully utilized, maximization of channel state information is taken as a target, optimal pilot frequency power distribution output is realized, pilot frequency resources can be remarkably saved, and the power utilization efficiency and the channel estimation performance are improved. A pilot signal is designed on the basis, so that the calculation complexity of transmitting pre-coding and receiving beam forming can be reduced.

The invention relates to a pilot power protection method and device, and relates to the technical field of power system protection, and the method comprises the steps: constructing a Bergeron equivalent circuit model of a DC line according to a system topological structure, and building a voltage and current deduction matrix from a measurement point to a reference point of each converter station; performing time-frequency analysis on a typical fault by adopting S transformation, and determining an optimal analysis frequency by comprehensively considering an amplitude accumulation index and a stability index; collecting voltage and current information of each converter station in real time, deducing the voltage and current information to a reference point through a deduction matrix after phase-mode transformation, extracting voltage and current phasors under a specific frequency by using recursion DFT, and calculating a power phasor; and constructing a longitudinal power actuating quantity and a longitudinal power braking quantity based on the law of conservation of power, establishing a longitudinal power protection criterion, and sending out a tripping instruction when the criterion is met. According to the invention, the internal fault of the three-terminal DC system can be effectively identified, and an effective protection solution is provided for the three-terminal distributed diode rectification delivery system.

A method includes receiving, by a user equipment (UE), a first message from a network apparatus, the first message including configuration information for superimposed pilot (SIP) transmission including a configuration for pilot power transmission and data power transmission; generating, by the UE, an SIP uplink (UL) transmission based upon the configuration information; and transmitting, by the UE, the SIP UL transmission to the network apparatus (Fig.5)

The invention discloses a photovoltaic power station inverter capacity ratio optimization method and system based on multivariable coordination, and relates to the technical field of inverter capacity ratio optimization, and the method comprises the steps: determining a key variable influencing the capacity ratio of an inverter in a photovoltaic power station; constructing a multivariable collaborative optimization model by taking the full-life-cycle net income maximization of the photovoltaic power station as an objective function; solving the multivariable collaborative optimization model, and outputting an optimal capacity ratio; and the optimal capacity ratio is applied to a simulation model of a photovoltaic power station or an actual pilot power station, and reconstruction optimization processing is executed through comparative analysis verification. According to the method and the device, the technical problems of unreasonable capacity ratio, low inverter operation efficiency and poor scheme adaptability caused by the fact that the influence of multiple key variables is not fully considered when the capacity ratio of the inverter is determined in the prior art are solved, and the technical effects of determining the optimal capacity ratio of the inverter and improving the inverter operation efficiency and the capacity ratio scheme adaptability are achieved.

This invention discloses a semi-blind direct localization method for thermal noise communication systems, comprising: based on the frequency domain received signal model of the thermal noise communication system, utilizing the statistical characteristics of the received signal to construct a maximum likelihood estimation problem concerning the mobile station position and channel fading coefficient, obtaining an objective function containing logarithmic determinant terms and trace function terms of a matrix; the objective function simultaneously includes a contribution from pilot power and an expected contribution from the power of the received data signal; using an optimization minimization algorithm framework, alternately solving for the mobile station position and channel fading coefficient until a preset convergence condition is met, obtaining the localization result; wherein, by constructing a substitution function containing the statistical characteristics of blind pilots and data, a closed-form solution for the channel parameters is derived in each iteration, and the mobile station position is updated through a two-dimensional grid search. This invention mines the statistical information of the data portion, effectively improving the utilization rate of the received signal and increasing the localization accuracy under low signal-to-noise ratio conditions.

The invention discloses a deep learning-based LiFi communication control method and device, a medium and equipment, and the method comprises the steps: obtaining a pilot frequency transmission interval time and a channel theoretical value at the current moment based on the flight state data of an unmanned plane at the current moment and the installation information of a transmitter and a detector; calculating a first pilot frequency power to enable the transmitter to transmit light carrying a pilot frequency signal according to the pilot frequency transmission interval time and the first pilot frequency power; acquiring second pilot frequency power of the light carrying the pilot frequency signal received by the detector, and inputting the second pilot frequency power, the first pilot frequency power and the flight state data into a first channel prediction model to obtain a first channel prediction value at the current moment; and determining a beamforming mode of the transmitter based on the first channel predicted value, the channel theoretical value and the channel actual value, and determining a beam weight based on the beamforming mode, so that the transmitter regulates the light emitting power based on the beam weight. According to the method, the beam weight is determined according to the time-varying characteristic of the LiFi channel, and the communication quality is improved.

This invention discloses a method for low-latency transmission of Internet of Things (IoT) assisted by a smart reflector and superimposed pilot signals, relating to the field of communication performance optimization technology. The method includes establishing a system model of URLLC assisted by a smart reflector and superimposed pilot signals to obtain a hybrid signal of direct and reflected links; performing LMMSE channel estimation on the obtained hybrid signal; based on the channel estimation result, performing data detection on the hybrid signal to obtain a lower bound of a closed-form expression for the achievable rate with a finite block length; based on the lower bound of the closed-form expression, constructing a joint optimization problem model of superimposed pilot power and smart reflector phase shift with the objective of maximizing user URLLC and rate; and designing an algorithm using a block coordinate descent method to jointly optimize the optimization problem and obtain the maximum weighted sum rate. This invention can improve transmission rate while reducing URLLC transmission latency.