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1818 条记录 (耗时 0.024 秒)

    Unique word and burst header detection for an expanded frequency range
    1.
    发明授权
    Unique word and burst header detection for an expanded frequency range 有权

    公开(公告)号：US11387858B2

    公开(公告)日：2022-07-12

    申请号：US16914071

    申请日：2020-06-26

    申请人： Hughes Network Systems, LLC

    发明人： Qiujun Huang

    IPC分类号： H03D1/00 ,  H04B1/16 ,  H04B1/08 ,  H04B7/185

    摘要： Various data transmission detection systems are described. A receiver input through which a wireless data transmission signal is received may be present. A plurality of mixers in communication with the receiver input may be present, which may be digitally implemented. A data transmission detector may be present that receives a mixed wireless data transmission signal from each mixer and creates a plurality of scores. A match detection module may be present that receives the scores and identifies a highest score. The signal mapped to the highest score to be selected for further processing.

    Multiple user interaction with audio devices using speech and gestures
    2.
    发明授权
    Multiple user interaction with audio devices using speech and gestures 有权

    公开(公告)号：US10928917B2

    公开(公告)日：2021-02-23

    申请号：US15951573

    申请日：2018-04-12

    申请人： International Business Machines Corporation

    发明人： Mohit Jain ,  Pratyush Kumar ,  Anup Agarwal

    IPC分类号： G06F3/01 ,  G06F3/16 ,  G06F3/043 ,  G06T7/262 ,  H03D1/00

    摘要： Methods, systems and computer program products for speech and gesture interaction of multiple users with devices using voice activated interfaces are provided herein. A computer-implemented method includes transmitting a pilot signal from a device comprising a voice activated interface, the pilot signal having a frequency, detecting motion of at least one user around the device, associating the detected motion with a gesture, and performing a function in response to the gesture. Detecting the motion includes receiving a reflected signal of the pilot signal caused by the motion of the at least one user, and detecting a shift in the reflected signal from the pilot signal, wherein detecting the shift comprises determining one or more differences between a waveform corresponding to the pilot signal and a waveform corresponding to the reflected signal.

    Method and apparatus for advanced OFDM triggering techniques
    3.
    发明授权
    Method and apparatus for advanced OFDM triggering techniques 有权

    公开(公告)号：US10812310B1

    公开(公告)日：2020-10-20

    申请号：US16655859

    申请日：2019-10-17

    申请人： Sirius XM Radio Inc.

    发明人： Edward Schell ,  Carl Scarpa

    IPC分类号： H03D1/00 ,  H04L27/06 ,  H04L27/26 ,  H04B7/185

    摘要： Systems and methods for a non-data-aided (NDA) approach to advanced OFDM timing are provided. This approach allows for accurate OFDM symbol timing and synchronization by avoiding inter-symbol interference (ISI) in multipath environments where an earliest arriving signal may not be the strongest signal. The NDA approach may rely on generating and applying a bias correction to a combined correlation result of the multi-path signals.

    Low power compact peak detector with improved accuracy
    4.
    发明授权
    Low power compact peak detector with improved accuracy 有权

    公开(公告)号：US10033364B1

    公开(公告)日：2018-07-24

    申请号：US15609160

    申请日：2017-05-31

    申请人： SILICON LABORATORIES INC.

    发明人： Abdulkerim L. Coban

    IPC分类号： H03D1/00 ,  H04L27/06 ,  H03K5/1532 ,  H03G3/20 ,  H04B1/16

    摘要： A peak detector including an input circuit with five same-sized transistors, in which four of the input transistors are coupled in parallel between a control node and a bias node and receive a corresponding one of two in-phase signals and two quadrature signals. The fifth transistor is coupled between a current node and the bias node and has its control terminal coupled to an output node. A bias circuit establishes a predetermined bias current that flows through the five input transistors. A current mirror mirrors the current through the fifth transistor from the current terminal into the four parallel-coupled input transistors via the control node. An output circuit charges a peak capacitor based on voltage developed at the control terminal of the fifth transistor. The peak detector is low power and compact and detects the actual peak of the input signal with greater accuracy compared to a conventional peak detector.

    Method and apparatus for adjusting a bandwidth of a sigma delta converter
    6.
    发明授权
    Method and apparatus for adjusting a bandwidth of a sigma delta converter 有权

    公开(公告)号：US09793917B2

    公开(公告)日：2017-10-17

    申请号：US14887024

    申请日：2015-10-19

    申请人： MOTOROLA SOLUTIONS, INC.

    发明人： Joshua E. Dorevitch

    IPC分类号： H03D1/00 ,  H03M3/00 ,  H04B1/16

    CPC分类号： H03M3/51 ,  H03M3/344 ,  H03M3/376 ,  H03M3/396 ,  H03M3/424 ,  H03M3/50 ,  H04B1/16

    摘要： A method and apparatus for adjusting a bandwidth of a sigma delta converter by adjusting a reference voltage provided to the sigma delta converter. The apparatus includes a switched capacitor digital-to-analog converter in the feedback loop of the sigma delta modulator. The sigma delta modulator determines the bandwidth mode of the converter and adjusts the reference voltage to deliver high performance functionality. In one embodiment, a multi-bit digital signal is received by the digital-to-analog converter. The reference voltage is provided to multiple capacitive circuits of the digital-to-analog converter and the capacitive circuits are activated and deactivated based on the multi-bit digital signal. The digital-to-analog converter, thus, provides a feedback analog signal using dynamic element matching.

    Signal detecting method and device
    7.
    发明授权
    Signal detecting method and device 有权

    公开(公告)号：US09729277B2

    公开(公告)日：2017-08-08

    申请号：US15331875

    申请日：2016-10-23

    申请人： Tsinghua University

    发明人： Leibo Liu ,  Guiqiang Peng ,  Peng Zhang ,  Yang Xue ,  Shouyi Yin ,  Shaojun Wei

    IPC分类号： H03D1/00 ,  H04L27/06 ,  H04L1/02 ,  H04L5/00 ,  H04B17/336 ,  H04B7/04 ,  H04B7/0413 ,  H04W88/08

    CPC分类号： H04L1/02 ,  H04B7/04 ,  H04B7/0413 ,  H04B17/26 ,  H04B17/336 ,  H04L5/006 ,  H04W52/225 ,  H04W88/08

    摘要： A signal detecting method and device are disclosed. The method includes: obtaining a matched filtering signal; determining a filtering matrix; decomposing the filtering matrix to obtain a principal diagonal matrix and a non-principal diagonal matrix; obtaining a parameter matrix and a parameter vector according to the principal diagonal matrix, the non-principal diagonal matrix, and the matched filtering signal; obtaining an iterative parameter and an iterative initial value according to the parameter matrix and the parameter vector; and performing an iterative calculation according to the iterative parameter and the iterative initial value; if the number of iterations reaches a preset number, obtaining an iterative final value, and obtaining an input of a decoder according to the iterative final value. The signal detection method may reduce the computational complexity and bit error rate, improve data throughput, and more advantageous for use in a large-scale multi-input multi-output system.

    Power supply device, power receiving device, charging system, and obstacle detection method
    9.
    发明授权
    Power supply device, power receiving device, charging system, and obstacle detection method 有权
    电源装置，受电装置，充电系统和障碍物检测方法

    公开(公告)号：US09484988B2

    公开(公告)日：2016-11-01

    申请号：US14378240

    申请日：2013-02-08

    申请人： Panasonic Corporation

    发明人： Satoshi Nakaya ,  Tsuyoshi Nishio

    IPC分类号： H02J7/00 ,  H04B5/00 ,  H02J5/00 ,  H01F38/14 ,  H03C1/00 ,  H03C3/00 ,  H03D1/00 ,  H03D3/00 ,  H02J7/02

    CPC分类号： H04B5/0037 ,  H01F38/14 ,  H02J5/005 ,  H02J7/025 ,  H02J50/10 ,  H02J50/60 ,  H03C1/00 ,  H03C3/00 ,  H03D1/00 ,  H03D3/00

    摘要： Provided are a power supply device, a power receiving device, a charging system, and an obstacle detection method that obtain a sufficient obstacle detection sensitivity even when an obstacle is small. A modulation unit (202) performs amplitude modulation or phase modulation on a test data sequence output from a test data sequence storage unit (201). A power control unit (203) generates, according to an instruction from a determination unit (204), a power control signal for increasing the power level of the test data sequence every time when the test data sequence is transmitted. The determination unit (204) determines whether there is an obstacle between the power receiving device and the power supply device based on whether the test data sequence output from the test data sequence storage unit (201) coincides with the test data sequence output from a power-transmitting-side receiving circuit (124).

    摘要翻译： 提供即使当障碍物小时也能够获得足够的障碍物检测灵敏度的电源装置，受电装置，充电系统和障碍物检测方法。 调制单元（202）对从测试数据序列存储单元（201）输出的测试数据序列进行幅度调制或相位调制。 功率控制单元（203）根据来自确定单元（204）的指令产生用于在每次发送测试数据序列时增加测试数据序列的功率电平的功率控制信号。 确定单元（204）基于从测试数据序列存储单元（201）输出的测试数据序列是否与从电源输出的测试数据序列一致，确定在电力接收设备和电源设备之间是否存在障碍物 - 发射侧接收电路（124）。