利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

14 条记录 (耗时 0.017 秒)

    Communication device, communication method, and computer-readable storage medium
    3.
    发明授权
    Communication device, communication method, and computer-readable storage medium 有权

    公开(公告)号：US11817991B2

    公开(公告)日：2023-11-14

    申请号：US17409843

    申请日：2021-08-24

    申请人： CANON KABUSHIKI KAISHA

    发明人： Makoto Umehara

    IPC分类号： H04L27/34 ,  H04L25/03

    CPC分类号： H04L27/3483 ,  H04L25/03006 ,  H04L2025/0377 ,  H04L2025/03713 ,  H04L2025/03815

    摘要： A communication device communicates a physical (PHY) frame including a preamble and a data field. The preamble includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), an EHT Signal Field (EHT-SIG-A), an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF) and the EHT-SIG-A includes fields indicating a modulation scheme and information indicating which one of a UC (Uniform Constellation) scheme and an NUC (Non Uniform Constellation) scheme is used as the modulation scheme, and the data field includes data that has undergone modulation corresponding to the modulation scheme and the information indicated by the fields.

    APPARATUSES AND METHODOLOGIES FOR DECISION FEEDBACK EQUALIZATION USING PARTICLE SWARM OPTIMIZATION
    4.
    发明申请
    APPARATUSES AND METHODOLOGIES FOR DECISION FEEDBACK EQUALIZATION USING PARTICLE SWARM OPTIMIZATION 有权
    使用粒子优化的决策反馈均衡的设备和方法

    公开(公告)号：US20170048088A1

    公开(公告)日：2017-02-16

    申请号：US15066611

    申请日：2016-03-10

    申请人： KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

    发明人： Naveed IQBAL ,  Azzedine Zerguine

    IPC分类号： H04L25/03 ,  H04B7/04 ,  G06F17/16 ,  H03H17/02 ,  G06F7/501

    CPC分类号： H04L25/03057 ,  G06F7/501 ,  G06F17/16 ,  G06N3/006 ,  H03H17/0277 ,  H04B7/0413 ,  H04B7/0854 ,  H04L25/03108 ,  H04L2025/037 ,  H04L2025/03713 ,  H04L2025/03732

    摘要： Methods and apparatuses are provided for channel equalization in a communication system. The method includes initializing, using processing circuitry, filter coefficients of an adaptive decision feedback equalizer randomly in a predetermined search space. Further, the method includes updating, using the processing circuitry, the filter coefficients. The filter coefficients are updated using a least mean square recursion when the filter coefficients are stagnant. The filter coefficients are updated using a particle swarm optimization procedure when the filter coefficients are not stagnant. Further, the updating step is repeated until a predetermined stopping criteria is met. Further, the method includes, filtering, using the processing circuitry, a received signal using the filter coefficients.

    摘要翻译： 在通信系统中提供了用于信道均衡的方法和装置。 该方法包括在预定的搜索空间中随机地使用处理电路初始化自适应判决反馈均衡器的滤波器系数。 此外，该方法包括使用处理电路来更新滤波器系数。 当滤波器系数停滞时，使用最小均方递归更新滤波器系数。 当滤波器系数不停滞时，使用粒子群优化程序来更新滤波器系数。 此外，重复更新步骤，直到满足预定的停止标准。 此外，该方法包括使用处理电路对使用滤波器系数的接收信号进行滤波。

    Least Squares Channel Identification for OFDM Systems
    5.
    发明申请
    Least Squares Channel Identification for OFDM Systems 有权

    公开(公告)号：US20160234042A9

    公开(公告)日：2016-08-11

    申请号：US14276857

    申请日：2014-05-13

    申请人： Acorn Technologies, Inc.

    发明人： Fernando Lopez de Victoria

    IPC分类号： H04L25/02

    CPC分类号： H04L25/0212 ,  H04L25/021 ,  H04L25/0224 ,  H04L25/0232 ,  H04L25/025 ,  H04L25/03159 ,  H04L2025/03713

    摘要： An OFDM system generates a channel estimate in the time domain for use in either a frequency domain equalizer or in a time domain equalizer. Preferably channel estimation is accomplished in the time domain using a locally generated reference signal. The channel estimator generates an initial estimate from a cross correlation between the time domain reference signal and an input signal input to the receiver and generates at least one successive channel estimate. Preferably the successive channel estimate is determined by vector addition (or subtraction) to the initial channel estimate. The at least one successive channel estimate reduces the minimum mean square error of the estimate with respect to a received signal.

    COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMPUTER-READABLE STORAGE MEDIUM
    6.
    发明公开
    COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMPUTER-READABLE STORAGE MEDIUM 审中-公开

    公开(公告)号：US20240048433A1

    公开(公告)日：2024-02-08

    申请号：US18483550

    申请日：2023-10-10

    申请人： CANON KABUSHIKI KAISHA

    发明人： Makoto Umehara

    IPC分类号： H04L27/34 ,  H04L25/03

    CPC分类号： H04L27/3483 ,  H04L25/03006 ,  H04L2025/03713 ,  H04L2025/0377 ,  H04L2025/03815

    摘要： A communication device communicates a physical (PHY) frame including a preamble and a data field. The preamble includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), an EHT Signal Field (EHT-SIG-A), an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF), and the EHT-SIG-A includes fields indicating a modulation scheme and information indicating which one of a UC (Uniform Constellation) scheme and an NUC (Non Uniform Constellation) scheme is used as the modulation scheme, and the data field includes data that has undergone modulation corresponding to the modulation scheme and the information indicated by the fields.

    Distributed Base Station with Frequency Domain Interface on Which Signal Subspace Varies According to Frequency Bin
    7.
    发明申请
    Distributed Base Station with Frequency Domain Interface on Which Signal Subspace Varies According to Frequency Bin 审中-公开
    具有频域接口的分布式基站，其中信号子空间根据频率Bin而变化

    公开(公告)号：US20170033961A1

    公开(公告)日：2017-02-02

    申请号：US15303656

    申请日：2014-04-14

    申请人： Nokia Solutions and Networks Oy

    发明人： Olli Piirainen ,  Shirish NAGARAJ

    IPC分类号： H04L27/26

    CPC分类号： H04L27/265 ,  H04L27/2647 ,  H04L2025/03713 ,  H04W72/0453 ,  H04W88/085

    摘要： A method and apparatus is disclosed for determining a signal subspace in a communications system. A remote apparatus obtains signal streams from antenna elements or signal streams from antenna beams. Based on the obtained signal streams, the apparatus selects a signal subspace for a user, the signal sub-space having a dimension M. Based on the selected signal subspace, the apparatus transmits, via an interface to a central apparatus, M streams of post-fast-Fourier-transform data, the interface being capable of transmitting a different sub-space for different frequency bins.

    摘要翻译： 公开了一种用于确定通信系统中的信号子空间的方法和装置。 远程设备从天线元件或天线波束的信号流中获得信号流。 基于获得的信号流，设备为用户选择信号子空间，信号子空间具有维度M.基于所选择的信号子空间，设备经由接口向中央设备发送M个信息流 快速傅里叶变换数据，该接口能够发送用于不同频率仓的不同子空间。

    Least Squares Channel Identification for OFDM Systems
    10.
    发明申请
    Least Squares Channel Identification for OFDM Systems 有权
    OFDM系统的最小二乘通道识别

    公开(公告)号：US20150333933A1

    公开(公告)日：2015-11-19

    申请号：US14276857

    申请日：2014-05-13

    申请人： Acorn Technologies, Inc.

    发明人： Fernando Lopez de Victoria

    IPC分类号： H04L25/02

    CPC分类号： H04L25/0212 ,  H04L25/021 ,  H04L25/0224 ,  H04L25/0232 ,  H04L25/025 ,  H04L25/03159 ,  H04L2025/03713

    摘要： An OFDM system generates a channel estimate in the time domain for use in either a frequency domain equalizer or in a time domain equalizer. Preferably channel estimation is accomplished in the time domain using a locally generated reference signal. The channel estimator generates an initial estimate from a cross correlation between the time domain reference signal and an input signal input to the receiver and generates at least one successive channel estimate. Preferably the successive channel estimate is determined by vector addition (or subtraction) to the initial channel estimate. The at least one successive channel estimate reduces the minimum mean square error of the estimate with respect to a received signal.

    摘要翻译： OFDM系统在时域中产生用于频域均衡器或时域均衡器中的信道估计。 优选地，使用本地生成的参考信号在时域中完成信道估计。 信道估计器根据时域参考信号和输入到接收机的输入信号之间的互相关产生初始估计，并产生至少一个连续的信道估计。 优选地，通过对初始信道估计的向量相加（或减法）来确定连续信道估计。 所述至少一个连续的信道估计相对于接收到的信号减小估计的最小均方误差。