Nxp Usa, Inc.

Inspur Suzhou Intelligent Technology Co., Ltd

Vinno Technology (suzhou) Co., Ltd.

Li Wang

Dechang Wang

Huan Mao

Dengyu Jiang

Yong Wang

Fei Chen

Ping Zhao

Zhenhua Guo

Changhao Shi

Wei Cao

Jianjun Guo

Dajun Yin

Fang Cao

Ruyang Sheng

Jan Horak

Zhiyong Qiu

The present application discloses an ultrasound beamforming method for suppressing clutter, comprising: obtaining channel data of ultrasound echo signals; applying a conventional apodization function to the channel data of the ultrasound echo signals to obtain a signal dataset, and applying a random apodization function to the channel data of the ultrasound echo signals to obtain a noise dataset, wherein the random apodization function is obtained by orthogonalization of the conventional apodization function; calculating correlation coefficients of the signal dataset and the noise dataset in two directions within a coordinate system; calculating processed spatial data for each point in the ultrasound echo signal channel data based on the correlation coefficients and the signal dataset; forming the ultrasound beam based on the processed spatial data to generate imaging data. The present application utilizes the wideband characteristics of the random window which, when used in conjunction with the conventional apodization function, can better suppress sidelobes while preserving the main lobe, thereby improving image contrast and spatial resolution.

Ultrasound beamforming method, system, and computer-readable medium for suppressing clutter

Power transmission associated with wireless charging of a battery of an electronic device or powering of the electronic device comprises determining a power loss associated with transmitting a power signal having a transmitted power from the wireless power transmitter to a wireless power receiver. A closed loop power loss control based on the power loss is performed which comprises outputting a target transmit power to meet a power loss limit. The power signal having the target transmit power is wirelessly transmitted to the wireless power receiver to charge the battery of the electronic device or power the electronic device and balance charging performance and safety.

Closed loop power loss control of wireless power transmission, and methods for wireless power transmission

An nGraph-based graphics processing unit (GPU) backend distributed training method and system, a computer-readable storage medium, and an electronic device. The method includes: receiving a training request, and obtaining corresponding training data; obtaining a Nvidia® Collective multi-GPU Communication Library (NCCL) file by means of a system path of the NCCL file linked to an nGraph framework; invoking an NCCL communication interface configuration according to the training request to obtain a training model, the NCCL communication interface is an NCCL file-based communication operation interface located at a GPU backend of the nGraph framework; and performing GPU backend training on the training data using the training model. The present application can satisfy an urgent need of a user for performing neural network distributed training on the basis of an nGraph GPU backend, thus further improving the performance of deep learning network training.

NGraph-based GPU backend distributed training method and system

A wireless charger includes a plurality of charging units for charging wirelessly chargeable devices. Each charging unit includes one or more transmit coils for producing a wireless charging signal. Each charging unit also includes a driver circuit for driving the one or more transmit coils. The driver circuit is switchable according to a charging PWM duty cycle of that charging unit. Each charging unit is operable to perform a Q factor measurement by injecting excitation energy into the one or more transmit coils of that charging unit to produce a free resonance signal, and measuring a decay rate of the free resonance signal. Each charging unit is operable to alter its charging PWM duty cycle during a time window in which another charging unit of the wireless charger is performing a Q factor measurement.

Wireless charger, system and method

A wireless charger includes a rectifier, a first filter that includes an inductor, a resonant tank circuit, and a second filter that includes a switch. The rectifier receives a drive signal from a voltage supply and generates a rectified voltage signal. The rectified voltage signal is filtered by the first filter and the filtered signal is provided to the tank circuit, which resonates to provide power wirelessly to a receiver. The switch of the second filter is connected in parallel with the inductor of the first filter. The switch is closed in order to bypass the inductor during a detection phase in which the wireless charger determines a quality factor of the tank circuit.

Q-factor determination in wireless charging system having complex resonant circuit

A wireless charger includes multiple transmitter coils, first and second drivers, and a controller. The transmitter coils are arranged close to and/or overlap with each other. The first driver is coupled with at least one of the transmitter coils to drive the transmitter coil to communicate with and/or provide power over a first channel to receiver devices. The second driver is coupled with at least another one of the transmitter coils to drive the transmitter coil to communicate with and/or provide power over a second channel to receiver devices. The controller is coupled with the first and second drivers and enables only one of the first and second drivers at a time during a first stage.

Multi-coil wireless charger

In a wireless charging system, a power-transmitting node (TX) has a power transmitter for transmitting power wirelessly to a power-receiving node (RX), a sampling and sensing circuit, a processor, and a signal receiver for receiving signals from the RX. The processor detects the presence of a foreign object (FO) during a power-transfer session using Quality Factor (QF) values. Estimated QF parameters are determined via exponential curve fitting using peak values of a damped sinusoidal waveform generated by a resonant circuit. Then the estimated parameters in the exponential curve are used to calculate the QF, which provides a robust measurement result even in a noisy environment.

Q-factor determination for foreign object detection circuit in wireless charging system

A wireless charging system (transmitter) has multiple transmit coils that allows for multiple receiver devices (receivers), such as cell phones, to be charged simultaneously. The receivers send data packets that include a receiver ID to the transmitter so that one of the transmitter coils can be paired with a respective one of the receivers. The transmitter can then distinguish between the communications with the receivers using the IDs such that communications with receivers connected with adjacent ones of the transmitter coils do not interfere with each other.

Method of pairing receiver with wireless charger transmitter

A power converter having a switch network, a resonant tank network, and a controller performs in situ determination of the Q-factor of the resonant tank network. The controller excites transitory damped oscillations of the resonant tank network by applying a limited number of ON-pulses to the transistor switches of the switch network. The controller then samples the envelope of the waveform corresponding to the excited transitory damped oscillations and processes the resulting set of digital signal samples to determine the Q-factor of the resonant tank network. The Q-factor determination can be repeated to prevent the power converter from being operated under undesirable operating conditions caused by certain ambient factors, such as the unexpected presence of metal objects in the immediate vicinity of the power converter.

Determination of Q-factor of resonant tank network

A wireless transmitter wirelessly charges/powers a wireless receiver. The transmitter performs an analog ping to tentatively detect a device. During an energizing phase of the analog ping, the transmitter applies power pulses to a resonant circuit within the transmitter, where, after application of the power pulses, the resonant circuit enters a free-resonance state of a resonating phase of the analog ping that follows the energizing phase. During the resonating phase, while the resonant circuit is in the free-resonance state, the transmitter samples voltage within the resonant circuit to generate one or more voltage-level samples. The transmitter processes the voltage-level samples to tentatively detect the device. If a device is tentatively detected then the transmitter performs a digital ping to definitively determine whether the device is present. If definitively detected then the transmitter wirelessly charges/powers the wireless receiver.

Free-resonance analog ping for wireless power transmission

A wireless charging system has a transmitter and a receiver. The transmitter has (i) a TX coil that wirelessly transfers power to the receiver and (ii) TX circuitry that powers the TX coil and detects receiver removal by comparing TX input power and TX power loss. The TX circuitry can determine (1) TX input power as the product of sampled TX input current and voltage and (2) TX power loss using a mapping based on sampled TX coil current. When the receiver is present, the difference between TX input power and TX power loss has a first value and when the receiver is removed, the difference has a second, lesser value. The transmitter detects removal of the receiver by determining when the difference decreases below a specified threshold level. By frequently generating and analyzing the difference, the transmitter can quickly detect receiver removal and safely power down the TX coil.

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Suzhou, China

Li Wang