公开(公告)号：US20220334671A1

公开(公告)日：2022-10-20

申请号：US17859576

申请日：2022-07-07

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD ,  STMICROELECTRONICS (BEIJING) R&D CO., LTD.

Inventor： Tae-gil KANG ,  Hang YIN ,  Cam Chung LA

IPC: G06F3/041 ,  G06F3/044

Abstract: An electronic device includes a touch screen for a touch sensitive display carried by a portable housing. The electronic device is configured to operate in a high detection threshold mode to determine whether an object is in contact with the touch sensitive display, and operate in a low detection threshold mode to determine whether the object is adjacent to the touch sensitive display, based on lack of detection of the object being in contact with the touch sensitive display. The electronic device is further configured to determine whether the object s in contact with a peripheral edge of the portable housing by determining whether the object is adjacent opposite sides of the touch sensitive display, based on detection of the object being adjacent to the touch sensitive display.

公开(公告)号：US20220308229A1

公开(公告)日：2022-09-29

申请号：US17655118

申请日：2022-03-16

Applicant: STMICROELECTRONICS (BEIJING) R&D CO., LTD ,  STMicroelectronics (Grenoble 2) SAS ,  STMICROELECTRONICS LTD.

Inventor： Etienne Bossart ,  Ji Nan Li ,  Cedric Patrick Jean Claude Colombo ,  Thomas Perotto

IPC: G01S17/894 ,  G01S17/10 ,  G01S7/4863 ,  G01S7/48 ,  H01L31/107

Abstract: The present disclosure concerns a method of measuring the distance between a device and an object comprising the steps of determination of a first estimated distance based on the time of flight of first light pulses having a first period; determination of a second estimated distance based on the time of flight of second light pulses having a second period different from the first period; determination based on the interval between the first and second estimated distances of whether the device is in a wraparound area among wraparound areas; and if the device is in a wraparound area among wraparound areas, adding to the first estimated distance a compensation having its value depending on the wraparound area.

公开(公告)号：US10296441B2

公开(公告)日：2019-05-21

申请号：US15203659

申请日：2016-07-06

Applicant: STMicroelectronics (Beijing) R&D Co. Ltd

Inventor： Xiao Kang Jiao ,  PengFei Zhu

IPC: G06F11/00 ,  G06F11/36 ,  G06F11/22

Abstract: A debug-enabled processing device includes a processor, a communication transceiver circuit, and a debug support unit. The debug support unit has a plurality of dedicated debug registers to facilitate debugging a software program under execution by the processor. One of the plurality of debug registers is a control register having at least four bits, which are used to enable/disable a plurality of debugging operations. Others of the debug registers include a set of index registers that may be configured to pass data to and from the processor.

公开(公告)号：US20170235321A1

公开(公告)日：2017-08-17

申请号：US15051406

申请日：2016-02-23

Applicant: STMicroelectronics (Beijing) R&D Co. Ltd

Inventor： Zhenghao Cui

IPC: G05F1/575

CPC classification number: G05F1/575 ,  H02M3/156 ,  H02M2001/0032 ,  H02M2001/0045

Abstract: An electronic device disclosed herein includes a linear output stage configured to generate an output voltage to an output node as a function of an input voltage, and a buck output stage configured to generate the output voltage to the output node as a function of the input voltage. Control circuitry is configured to enable the linear output stage and disable the buck output stage if a current demanded by a load to maintain the output voltage at a desired level is less than a limit current, and enable the buck output stage and disable the linear output stage a delay period of time after enabling the buck output stage, if the current demanded by the load to maintain the output voltage at the desired level is greater than the limit current.

公开(公告)号：US09014284B2

公开(公告)日：2015-04-21

申请号：US13974992

申请日：2013-08-23

Applicant: STMicroelectronics (Beijing) R&D Co., Ltd.

Inventor： Sen Jiang

IPC: H04L27/26 ,  H04L27/00

CPC classification number: H04L27/2618 ,  H04L27/0006 ,  H04L27/2614

Abstract: In an embodiment, a transmitter includes first and second processing blocks, which may each include hardware, software, or a combination of hardware and software. The first processing block is operable to generate a first peak-reducing vector. And the a second first processing block is operable to receive a first data vector, the data vector comprising a plurality of samples, the first data vector having a first peak with a first index and a first magnitude, a second peak with a second index and a second magnitude that is less than the first magnitude, and a first peak-to-average power ratio, and to generate a second data vector having a second peak-to-average power ratio that is lower than the first peak-to-average power ratio by using the first peak-reducing vector.

Abstract translation: 在一个实施例中，发射机包括第一和第二处理块，其可以各自包括硬件，软件或硬件和软件的组合。 第一处理块可操作以产生第一峰值减小向量。 第二处理块可操作以接收第一数据向量，所述数据向量包括多个样本，所述第一数据向量具有具有第一索引和第一幅度的第一峰值，具有第二索引和第二幅度的第二峰值 小于第一幅度和第一峰均功率比，并且通过以下方式生成具有低于第一峰均功率比的第二峰均功率比的第二数据矢量 使用第一降频矢量。

公开(公告)号：US08099093B2

公开(公告)日：2012-01-17

申请号：US12112969

申请日：2008-04-30

Applicant: Zhen Ning Peng

Inventor： Zhen Ning Peng

IPC: H04W24/00

CPC classification number: H04W16/14 ,  H04W48/16

Abstract: A database stores updated information concerning protected communications services. A base station for a coexisting, and potentially co-channel, non-protected communications service makes an inquiry of the database requesting an identification of geographically relevant protected services along with the database stored information pertinent to each of those identified protected services. The returned information is processed by the base station to determine what channels are available for use by the non-protected service. An available channel is identified by the base station as the working channel for the non-protected service and the base station initiates a process to establish a communications network using the non-protected service and the selected working channel.

公开(公告)号：US20110159831A1

公开(公告)日：2011-06-30

申请号：US12860267

申请日：2010-08-20

Applicant: Sen JIANG

Inventor： Sen JIANG

IPC: H04B7/00 ,  H04B17/00

CPC classification number: H04L25/0212 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0228

Abstract: According to an embodiment, a receiver, system and method for channel estimation in a communications system utilizing multiple transmit antennas are provided. The receiver comprises an antenna node operable to receive a signal that includes a superposition of at least a first signal corresponding to a first sequence and a second signal corresponding to a second sequence; and a channel estimator, coupled to the antenna node, operable to correlate the received signal with at least one of the first and second sequences, to determine at least one boundary between at least two waveforms resulting from the correlation, and to calculate using the boundary and the at least two waveforms a first channel response corresponding to the first signal and a second channel response corresponding the second signal. Channel estimates are determined based on determined boundaries and may be smoothed by a Savitzky-Golay filter in the frequency domain. The variance of additive white Gaussian noise (AWGN) may also be estimated.

Abstract translation: 根据实施例，提供了一种在使用多个发射天线的通信系统中用于信道估计的接收机，系统和方法。 接收机包括天线节点，可操作以接收包括至少对应于第一序列的第一信号和对应于第二序列的第二信号的叠加的信号; 以及耦合到所述天线节点的信道估计器，其可操作以将所接收的信号与所述第一和第二序列中的至少一个相关联，以确定由所述相关产生的至少两个波形之间的至少一个边界，并且使用所述边界计算 并且所述至少两个波形是对应于第一信号的第一信道响应和对应于第二信号的第二信道响应。 信道估计是基于确定的边界确定的，并且可以通过频域中的Savitzky-Golay滤波器来平滑。 还可以估计加性白高斯噪声（AWGN）的方差。

公开(公告)号：US07856591B2

公开(公告)日：2010-12-21

申请号：US11687543

申请日：2007-03-16

Applicant: Wuxian Shi ,  Juan Du ,  Yiqun Ge ,  Guobin Sun

Inventor： Wuxian Shi ,  Juan Du ,  Yiqun Ge ,  Guobin Sun

IPC: H03M13/03

CPC classification number: H03M13/3938 ,  H03M13/413 ,  H03M13/6362 ,  H03M13/6502 ,  H03M13/6505 ,  H04L1/0054 ,  H04L1/0059

Abstract: A method for decoding tail-biting convolutional codes. The method includes initializing a correction depth, selecting a first starting state from a set of encoding states, and initializing a metric value for the selected starting state as zero and the other states as infinity. The input bit stream is read and a Search Depth Viterbi algorithm (SDVA) is performed to determine path metrics and identify a minimum-metric path. The ending state for the minimum-metric path is determined and the output for this ending state is identified as “previous output.” A second starting state is set to the ending state of the minimum-metric path, and symbols equal to the correction depth from the previous output are read. The SDVA is performed on the second set of read symbols to generate a corrected output. A decoded output is generated by replacing symbols at the beginning of the previous output with the corrected output.

Abstract translation: 一种用于解码尾巴卷积码的方法。 该方法包括初始化校正深度，从一组编码状态中选择第一起始状态，以及将所选择的起始状态的度量值初始化为零，将其他状态初始化为无穷大。 读取输入比特流，执行搜索深度维特比算法（SDVA）以确定路径度量并识别最小度量路径。 确定最小度量路径的结束状态，并将该结束状态的输出识别为“先前输出”。将第二起始状态设置为最小度量路径的结束状态，等于校正深度的符号 从以前的输出读取。 在第二组读符号上执行SDVA以产生校正输出。 通过使用校正输出替换先前输出开始处的符号来产生解码输出。

公开(公告)号：US20080056116A1

公开(公告)日：2008-03-06

申请号：US11833157

申请日：2007-08-02

Applicant: Yiqun Ge ,  Xutao Zhou ,  Wuxian Shi

Inventor： Yiqun Ge ,  Xutao Zhou ,  Wuxian Shi

IPC: H04J11/00 ,  H04B7/216

CPC classification number: H04L27/2657 ,  H04L27/2676

Abstract: A blind carrier frequency offset estimator is based on a single-OFDM-symbol training sequence in multi-user OFDMA uplink. Through multiple access interference modeling and analysis, a virtual user is employed that occupies the all null sub-carriers. By minimizing the energy leakage on the virtual user in term of tentative frequency offsets, the estimator can approach the real frequency offset. The estimator performs only on frequency-domain, simplifies interference calculations, and lowers the rank of the matrix. An iterative computation method is used to approach the real frequency offset.

Abstract translation: 盲载波频偏估计器基于多用户OFDMA上行链路中的单OFDM符号训练序列。 通过多址干扰建模和分析，采用占用全部空子载波的虚拟用户。 通过最小化虚拟用户在暂定频率偏移方面的能量泄漏，估计器可以接近实际频率偏移。 估计器仅在频域上执行，简化了干扰计算，并降低了矩阵的秩。 迭代计算方法用于逼近实际频偏。

公开(公告)号：US20250147626A1

公开(公告)日：2025-05-08

申请号：US19018944

申请日：2025-01-13

Applicant: STMICROELECTRONICS ( BEIJING) R&D CO. LTD ,  STMICROELECTRONICS LTD.

Inventor： Pengcheng Wen ,  Yuan Yun Wang

IPC: G06F3/041 ,  G06F3/044 ,  G09G3/3233

Abstract: A method of operating a display includes performing a non-synchronized touch scan pattern on a display with a controller coupled to the display. The non-synchronized touch scan pattern schedules touch scans independent of a refresh rate of the display. Upon the controller detecting a first synchronization pulse from a display controller coupled to the controller and the display, a first pulse-checking timer is started. Upon detecting a second synchronization pulse from the display controller and before the first pulse-checking timer expires, a first display refresh rate for the display is obtained from an interval between the first synchronization pulse and the second synchronization pulse. A synchronized touch scan pattern is performed with the controller, and is scheduled to avoid touch scans coinciding with refreshes of the display performed at the first display refresh rate.