Huawei Technologies Co., Limited

China University of Mining and Technology

Jianhua Qin

Lei Zhang

Zhiwei Zhang

Liu Yang

Yunbao Zeng

Huabin Liu

Ya Lin

Zhehan Yu

Junshi Chen

Yingwei Wang

Long Tan

The provided is an experimental apparatus and method for shale supercritical synergistic penetration and imbibition based on damping vibration, including a reaction autoclave; a damping vibration measurement device, used for measuring the weight of a rock sample; a temperature control device, used for heating and cooling the internal environment of the reaction autoclave; a pressure control device, disposed on the reaction autoclave lid; a water level control device, disposed on the upper inner wall of the reaction autoclave body; a conductivity testing device, disposed on the inner bottom of the reaction autoclave body; and a data processing device, disposed on the reaction autoclave body, used for receiving and processing signals transmitted from the damping vibration measurement device, temperature control device, pressure control device, water level control device, and conductivity testing device.

Experimental apparatus and method for shale supercritical synergistic penetration and imbibition based on damping vibration

Embodiments of the present disclosure a digital predistortion system and method based on envelope tracking, and a radio frequency system, so as to reduce complexity of the digital predistortion system based on envelope tracking. The system includes: a digital predistorter, a digital-to-analog converter, a frequency mixer, a power amplifier, and a power supply apparatus; where a value range of a predistortion signal that is obtained when the digital predistorter uses a first processing manner is within a first interval, and in this case, a value of a supply voltage generated by the power supply apparatus is a constant; a value range of the predistortion signal that is obtained when the digital predistorter uses a second processing manner is within a second interval, and in this case, a change of the supply voltage generated by the power supply apparatus tracks a change of an envelope signal of the predistortion signal.

Digital predistortion system and method based on envelope tracking and radio frequency system

The present invention relates to the field of communication technologies and discloses a method and an apparatus for auto gain control (AGC) in a radio receiver, which can ensure that a radio frequency device, an analog device, and various nodes in a digital domain are non-saturated and that useful signal power is adjusted to a certain power level. According to the present invention, total signal power on an air interface is subtracted from a preset first target power to obtain an analog auto gain control (AAGC) gain, and then a second target power is subtracted from an interference signal power in a digital baseband to obtain a digital auto gain control (DAGC) gain.

Method and apparatus for auto gain control in radio receiver

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Beijing, China

Jianhua Qin