公开(公告)号：US20070109025A1

公开(公告)日：2007-05-17

申请号：US11593129

申请日：2006-11-06

申请人： Yan-Fei Liu ,  Kai Xu

发明人： Yan-Fei Liu ,  Kai Xu

IPC分类号： H03K5/22 ,  H03K17/72

CPC分类号： H03K17/04123 ,  H03K17/693 ,  H03K2217/0036

摘要： This invention relates to a resonant gate drive circuit for a power switching device, such as a MOSFET, that uses a centre-tapped transformer to increase the driving gate voltage approximately twice as high as the supply voltage. The gate capacitance of the power switching device is charged and discharged by a constant current source, which increases the switching transition speed of the power switch. The circuit is suitable for driving a pair of low side switches with 50% duty cycle or less, such as in a variable frequency resonant converter, push-pull converter, or the like.

摘要翻译： 本发明涉及一种用于诸如MOSFET的功率开关器件的谐振栅极驱动电路，其使用中心抽头变压器来增加大约是电源电压两倍的驱动栅极电压。 电源开关器件的栅极电容由恒流源充电和放电，这增加了电源开关的开关转换速度。 该电路适用于驱动具有50％占空比或更小的一对低侧开关，例如在可变频率谐振转换器，推挽转换器等中。

公开(公告)号：US06980783B2

公开(公告)日：2005-12-27

申请号：US10265168

申请日：2002-10-03

申请人： Yan-Fei Liu ,  Raymond Orr ,  Kai Xu

发明人： Yan-Fei Liu ,  Raymond Orr ,  Kai Xu

IPC分类号： H02M3/156 ,  H04B1/10

CPC分类号： H02M3/156 ,  H02M2001/0009 ,  H02M2001/0022

摘要： A circuit controls the low frequency load currents drawn by components of telecommunications systems. The circuit includes a power converter, a first sense circuit, a second sense circuit, a comparator, and a power converter control circuit. The power converter control circuit controls the power converter's duty cycle in accordance with the input signal compared to a reference. In this manner, the low frequency load currents may be easily and economically controlled.

摘要翻译： 电路控制电信系统组件所绘制的低频负载电流。 该电路包括功率转换器，第一感测电路，第二感测电路，比较器和功率转换器控制电路。 功率转换器控制电路根据与参考相比的输入信号来控制功率转换器的占空比。 以这种方式，可以容易且经济地控制低频负载电流。

公开(公告)号：US07453292B2

公开(公告)日：2008-11-18

申请号：US11593129

申请日：2006-11-06

申请人： Yan-Fei Liu ,  Kai Xu

发明人： Yan-Fei Liu ,  Kai Xu

IPC分类号： H03K3/00

CPC分类号： H03K17/04123 ,  H03K17/693 ,  H03K2217/0036

摘要： This invention relates to a resonant gate drive circuit for a power switching device, such as a MOSFET, that uses a center-tapped transformer to increase the driving gate voltage approximately twice as high as the supply voltage. The gate capacitance of the power switching device is charged and discharged by a constant current source, which increases the switching transition speed of the power switch. The circuit is suitable for driving a pair of low side switches with 50% duty cycle or less, such as in a variable frequency resonant converter, push-pull converter, or the like.

摘要翻译： 本发明涉及一种用于诸如MOSFET的功率开关器件的谐振栅极驱动电路，其使用中心抽头变压器来增加大约是电源电压两倍的驱动栅极电压。 电源开关器件的栅极电容由恒流源充电和放电，这增加了电源开关的开关转换速度。 该电路适用于驱动具有50％占空比或更小的一对低侧开关，例如在可变频率谐振转换器，推挽转换器等中。

公开(公告)号：US11265910B2

公开(公告)日：2022-03-01

申请号：US16739460

申请日：2020-01-10

申请人： Alireza Babaei ,  Esmael Dinan ,  Hua Zhou ,  Ali Cirik ,  Hyoungsuk Jeon ,  Kyungmin Park ,  Kai Xu ,  Nazanin Rastegardoost

发明人： Alireza Babaei ,  Esmael Dinan ,  Hua Zhou ,  Ali Cirik ,  Hyoungsuk Jeon ,  Kyungmin Park ,  Kai Xu ,  Nazanin Rastegardoost

IPC分类号： H04B7/06 ,  H04W72/14 ,  H04W72/04 ,  H04L5/00 ,  H04L1/18 ,  H04W16/14 ,  H04W74/08 ,  H04W74/02 ,  H04W76/11

摘要： A wireless device receives configuration parameters of one or more configured grants of a cell. The wireless device determines a first size of an uplink control information based on a second size of one or more code block groups of a transport block. The wireless device transmits, via a radio resource of the one or more configured grants, the one or more code block groups of the transport block the uplink control information with the first size.

公开(公告)号：US20220030577A1

公开(公告)日：2022-01-27

申请号：US17383499

申请日：2021-07-23

申请人： Hua Zhou ,  Esmael Hejazi Dinan ,  Ali Cagatay Cirik ,  Yunjung Yi ,  Kai Xu ,  Hyoungsuk Jeon

发明人： Hua Zhou ,  Esmael Hejazi Dinan ,  Ali Cagatay Cirik ,  Yunjung Yi ,  Kai Xu ,  Hyoungsuk Jeon

IPC分类号： H04W72/04

摘要： In some embodiments, a wireless device receives a plurality of downlink control information (DCIs) via a plurality of resource block (RB) sets of a bandwidth part of a cell. The plurality of DCIs indicate downlink radio resources. The wireless device receives a transport block via the downlink radio resources. Based on RB set indexes of the plurality of RB sets, the wireless device determines a DCI from the plurality of DCIs. Then, the wireless device transmits feedback information, for the transport block, via an uplink control channel resource determined based on the DCI.

公开(公告)号：US20210345410A1

公开(公告)日：2021-11-04

申请号：US17246112

申请日：2021-04-30

申请人： Hua Zhou ,  Esmael Hejazi Dinan ,  Yunjung Yi ,  Ali Cagatay Cirik ,  Jonghyun Park ,  Hyoungsuk Jeon ,  Kai Xu

发明人： Hua Zhou ,  Esmael Hejazi Dinan ,  Yunjung Yi ,  Ali Cagatay Cirik ,  Jonghyun Park ,  Hyoungsuk Jeon ,  Kai Xu

IPC分类号： H04W74/08 ,  H04W74/00 ,  H04W52/24

摘要： Described are embodiments for selecting a preamble for a random access procedure. In an embodiment, a wireless device receives one or more configuration parameters of physical random access channel (PRACH) occasions for the random access procedure. One or more PRACH occasions of the PRACH occasions correspond to a respective RS of a plurality of RSs. The wireless device determines a RS, from the plurality of RSs, based on a reference signal received power (RSRP) value of the RS, and a transmission power reduction value associated with the RS. The wireless device determines a PRACH occasion, associated with the RS, from the PRACH occasions. Then, the wireless device transmits, via the PRACH occasion, a preamble for the random access procedure.

公开(公告)号：US20210305999A1

公开(公告)日：2021-09-30

申请号：US17218738

申请日：2021-03-31

申请人： Zhikang Zhang ,  Fengbo Ren ,  Kai Xu

发明人： Zhikang Zhang ,  Fengbo Ren ,  Kai Xu

IPC分类号： H03M7/30 ,  G06N3/08 ,  G06N3/04

摘要： A compression ratio (CR) adapter (CRA) for end-to-end data-driven compressive sensing (CS) reconstruction (EDCSR) frameworks is provided. EDCSR frameworks achieve state-of-the-art reconstruction performance in terms of reconstruction speed and accuracy for images and other signals. However, existing EDCSR frameworks cannot adapt to a variable CR. For applications that desire a variable CR, existing EDCSR frameworks must be trained from scratch at each CR, which is computationally costly and time-consuming. Embodiments described herein present a CRA framework that addresses the variable CR problem generally for existing and future EDCSR frameworks with no modification to given reconstruction models nor enormous additional rounds of training needed. The CRA exploits an initial reconstruction network to generate an initial estimate of reconstruction results based on a small portion of acquired image measurements. Subsequently, the CRA approximates full measurements for the main reconstruction network by complementing the sensed measurements with a re-sensed initial estimate.

公开(公告)号：US11095419B2

公开(公告)日：2021-08-17

申请号：US16732576

申请日：2020-01-02

申请人： Ali Cagatay Cirik ,  Esmael Dinan ,  Hua Zhou ,  Hyoungsuk Jeon ,  Alireza Babaei ,  Kyungmin Park ,  Kai Xu

发明人： Ali Cagatay Cirik ,  Esmael Dinan ,  Hua Zhou ,  Hyoungsuk Jeon ,  Alireza Babaei ,  Kyungmin Park ,  Kai Xu

IPC分类号： H04L5/00 ,  H04W76/27 ,  H04W72/14 ,  H04W76/28 ,  H04L1/18 ,  H04W72/04 ,  H04W74/08 ,  H04L1/00 ,  H04L25/02 ,  H04L1/16

摘要： A wireless device receives one or more first radio resource control (RRC) messages. The first RRC messages comprise one or more configuration parameters of a first cell and a second cell. A second RRC message is received. The second RRC message indicates a first change of a first active bandwidth part (BWP) of the first cell. Processing of the second RRC message is completed. A determination is made that the completing occurs during a time duration of a second change of a second active BWP of the second cell. Based on the determining, the first change of the first active BWP is delayed until the second change of the second active BWP is completed.

公开(公告)号：USD918136S1

公开(公告)日：2021-05-04

申请号：US29688231

申请日：2019-04-19

申请人： Kai Xu

设计人： Kai Xu

公开(公告)号：US20210105751A1

公开(公告)日：2021-04-08

申请号：US17036461

申请日：2020-09-29

申请人： Kai Xu ,  Esmael Hejazi Dinan ,  Hua Zhou ,  Yunjung Yi ,  Ali Cagatay Cirik ,  Youngwoo Kwak

发明人： Kai Xu ,  Esmael Hejazi Dinan ,  Hua Zhou ,  Yunjung Yi ,  Ali Cagatay Cirik ,  Youngwoo Kwak

IPC分类号： H04W72/04 ,  H04L5/00 ,  H04W16/28

摘要： A wireless device receives, from a base station, one or more messages comprising configuration parameters indicating a sounding reference signal (SRS) resource set. A downlink control information is received. The downlink control information comprising an SRS resource indicator (SRI) and an uplink transmission configuration indicator (UL-TCI). The SRI indicates one or more SRS resources of the SRS resource set. In response to the UL-TCI being equal to a predefined value, a determination is made of an uplink spatial domain transmission filter based on the one or more SRS resources of the SRS resource set. A transport block with the uplink spatial domain transmission filter is transmitted via a physical uplink shared channel.