Hao Chen, 552436 Ravenhurst Dr, Plano, TX 75025

6570415, May 27, 2003

May 30, 2002

10/158659

Hao Chen - Dallas TX
Rolf Lagerquist - Richardson TX
Hugh Mair - Fairview TX

Texas Instruments Incorporated - Dallas TX

H03B 100

327108, 327563, 327 65, 327206, 326 83

A predriver for a differential pair having a reduce voltage swing is disclosed having fast switching speed and low power consumption. The predriver includes a p-type MOS transistor, and a first and second n-type MOS transistor. The source of the p-type MOS couples to the first power supply rail. The gate of the first n-type MOS transistor couples to the gate of the p-type MOS transistor to form an input. The drain of the first n-type MOS transistor couples to the drain of the p-type MOS transistor to form an output. The drain of the second n-type MOS transistor couples to the source of the first n-type MOS transistor. The source of the second n-type MOS transistor couples to ground. The gate of the second n-type MOS transistor couples to the output. The presence of the second n-type MOS transistor alters the voltage swing of the predriver to be from the threshold voltage level to the full power supply voltage, substantially reducing the current or power consumption.

6008611, Dec 28, 1999

Nov 20, 1998

9/196788

Hao Chen - Plano TX
Edward N. Jeffrey - Garland TX
Fredrick W. Trafton - Lewisville TX

Texas Instruments Incorporated - Dallas TX

G05B 1128

318599

A method of driving an electric motor includes generating a periodic, driving voltage. The driving voltage comprises a sequence of first, second, and third waveforms. The first waveform in the sequence is a generally constant, high voltage. The second waveform in the sequence is a down hook voltage. The third waveform in the sequence is an up hook voltage. The method also includes applying the driving voltage to a coil of the motor to generate a generally sinusoidal current through the coil of the motor.

6163118, Dec 19, 2000

Nov 20, 1998

9/197243

Hao Chen - Plano TX
Gregory Swize - Dallas TX
Bertram John White - Irvine CA

Texas Instruments Incorporated - Dallas TX

H02K 2300

318254

A method of detecting phase error between a phase current and a driving voltage includes generating a signal indicative of the phase current. The method includes identifying a time interval during which the signal indicative of the phase current is generally symmetric about a midpoint of the time interval when the phase error is approximately zero. The method further includes determining the extent to which the signal indicative of the phase current is symmetric about the midpoint of the time interval. Finally, in response to determining the extent to which the signal indicative of the phase current is symmetric, the method includes generating phase error information.

2022041, Dec 29, 2022

Jun 14, 2022

17/840324

- Suwon-si, KR
Hao Chen - Plano TX, US
Khuong N. Nguyen - Frisco TX, US
Abhishek Sehgal - Plano TX, US
Boon Loong Ng - Plano TX, US

H04W 52/02
H04B 1/7163

A method includes determining one or more active slots and inactive slots in an ultra-wide band (UWB) ranging round. The method also includes determining multiple UWB silent periods in the ranging round based on an arrangement of the inactive slots. The method also includes determining a sleep-wake-up schedule that aligns with at least one selected silent period of the multiple UWB silent periods in the ranging round, the sleep-wake-up schedule to be used for Wi-Fi communication. The method also includes waking up a Wi-Fi station (STA) for the Wi-Fi communication during the at least one selected silent period, then going back to sleep according to the sleep-wake-up schedule.

2022037, Nov 24, 2022

Jan 26, 2022

17/585404

- Suwon, Gyeonggi-do, KR
Ahmed Atef Ibrahim Ibrahim - Plano TX, US
Hao Chen - Plano TX, US
Shiyang Leng - Allen TX, US
Namjeong Lee - Seoul, KR
Jianzhong Zhang - Plano TX, US

H04B 7/024
H04B 17/309
H04B 17/382
H04L 1/00

A method includes obtaining one or more channel quality and performance indicators of a user equipment (UE) from multiple transmit-receive points (TRPs) in a coordinated multipoint (CoMP) cluster. The method also includes generating a set of performance metrics from the one or more channel quality and performance indicators. The method also includes determining a number of helping layers for multiplexing joint transmission (Mux-JT) in the CoMP cluster based on the set of performance metrics. The method also includes selecting a modulation and coding scheme (MCS) for the Mux-JT based on at least one channel quality indicator (CQI) of the UE.

2022037, Nov 24, 2022

Oct 20, 2021

17/506547

- Suwon-si, KR
Ahmed Atef Ibrahim Ibrahim - Plano TX, US
Hao Chen - Plano TX, US
Rebal Al Jurdi - Allen TX, US
Jianzhong Zhang - Plano TX, US

H04B 7/06
H04B 7/0417
H04L 5/00
H04W 72/12

A system and method for user selection in distributed multiple-input, multiple-output (MIMO). The system performs a method that includes configuring a first channel state information-reference signal (CSI-RS) resource set for a serving transmission point (TRP) and a second CSI-RS resource for a concatenated channel, wherein the concatenated channel is between a virtual panel and the apparatus, the virtual panel comprising distributed panels from a serving TRP and a helping TRP. The method also includes computing a metric as a function of one or more quantities included in one or more measurement reports, received from a user equipment (UE), for the concatenated channel and at least one of the serving TRP channel or the helping TRP channel. The method also includes configuring, based on the metric, the UE for one of: a legacy transmission or a distributed MIMO transmission.

2022037, Nov 24, 2022

Jan 14, 2022

17/576458

- Suwon-si, KR
Ahmed Atef Ibrahim Ibrahim - Plano TX, US
Hao Chen - Plano TX, US
Shiyang Leng - Allen TX, US
Namjeong Lee - Suwon-si, KR
Jianzhong Zhang - Dallas TX, US

H04L 5/00

A method includes obtaining, by a transmit-receive point (TRP), a set of power metrics for multiple UEs including a served UE and one or more helped UEs, wherein each power metric is estimated from multiple channel quality and performance indicators of one of the multiple UEs. The method also includes calculating a performance metric as a function of at least one of the multiple channel quality and performance indicators of the served UE. The method also includes calculating an interference metric as a function of the set of power metrics. The method also includes determining whether to perform coordinated beamforming based on the performance metric and the interference metric. The method also includes determining one or more precoders based on the determination of whether to perform the coordinated beamforming.

2022037, Nov 24, 2022

Dec 23, 2021

17/645941

- Suwon-si, KR
Hao Chen - Allen TX, US
Rubayet Shafin - Allen TX, US
Jianzhong Zhang - Plano TX, US

H04W 28/24
H04W 24/04
H04W 24/10
H04W 24/08
H04W 72/12
H04W 28/02

An apparatus includes a network interface, a processor and a memory. The memory contains instructions, which when executed by the processor, cause the apparatus to identify a target base station and a target slice comprising an electronic device for service level agreement (SLA) monitoring, send, via the network interface to the target base station, a trigger message for initiating SLA reporting by the electronic device of the target slice connected to the target base station, receive, from the target base station via the network interface, at least one SLA report from the electronic device of the target slice, determine an SLA violation level based on the at least one SLA report, determine updated scheduling parameters based on the SLA violation level, and send the updated scheduling parameters to the target base station via the network interface.