利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

246 条记录 (耗时 0.022 秒)

    Device and method for linear listener echo cancellation
    1.
    发明授权
    Device and method for linear listener echo cancellation 失效
    用于线性侦听器回声消除的设备和方法

    公开(公告)号：US5319636A

    公开(公告)日：1994-06-07

    申请号：US791702

    申请日：1991-11-14

    申请人： Guozhu Long ,  Fuyun Ling ,  M. Vedat Eyuboglu

    发明人： Guozhu Long ,  Fuyun Ling ,  M. Vedat Eyuboglu

    IPC分类号： H04B3/23 ,  H04J15/00

    CPC分类号： H04B3/235 ,  H04B3/232

    摘要： A device and method utilize a linear feedback/feedforward configuration to estimate and cancel a listener echo wherein equalizer (202) and listener echo cancellation (204 and 208) units are jointly updated, allowing determination of an error signal once (204 and 208), in place of the former method of separate error signal determination for each of an equalizer and a listener echo canceller. An improved phase-correction scheme is utilized to compensate the frequency offset in the listener echo. The relationship between the listener echo and talker far echo is utilized to facilitate the listener echo cancellation.

    摘要翻译： 一种设备和方法利用线性反馈/前馈配置来估计和消除收听者回声，其中均衡器（202）和收听者回声消除（204和208）单元被联合更新，允许确定一次错误信号（204和208） 代替均衡器和收听回波消除器中的每一个的单独的误差信号确定的前一种方法。 利用改进的相位校正方案来补偿收听者回波中的频率偏移。 听众回声和讲话者远端回声之间的关系被用来促进听众回声消除。

    Device and method for linear listener echo cancellation
    2.
    发明授权
    Device and method for linear listener echo cancellation 失效
    用于线性侦听器回声消除的设备和方法

    公开(公告)号：US5406552A

    公开(公告)日：1995-04-11

    申请号：US181278

    申请日：1994-01-13

    申请人： Guozhu Long ,  Fuyun Ling ,  M. Vedat Eyuboglu

    发明人： Guozhu Long ,  Fuyun Ling ,  M. Vedat Eyuboglu

    IPC分类号： H04B3/23 ,  H04M1/00

    CPC分类号： H04B3/235 ,  H04B3/232

    摘要： A device and method utilize a linear feedback/feedforward configuration to estimate and cancel a listener echo wherein equalizer (202) and listener echo cancellation (204 and 208) units are jointly updated, allowing determination of an error signal (204 and 208), in place of the former method of separate error signal determination for each of an equalizer and a listener echo canceller. An improved phase-correction scheme is utilized to compensate the frequency offset in the listener echo. The relationship between the listener echo and talker far echo is utilized to facilitate the listener echo cancellation.

    摘要翻译： 设备和方法利用线性反馈/前馈配置来估计和消除收听者回声，其中均衡器（202）和收听者回声消除（204和208）单元被联合更新，允许确定误差信号（204和208） 对于均衡器和收听回波消除器中的每一个，单独的误差信号确定的前一种方法的位置。 利用改进的相位校正方案来补偿收听者回波中的频率偏移。 听众回声和讲话者远端回声之间的关系被用来促进听众回声消除。

    Fast training echo canceller
    3.
    发明授权
    Fast training echo canceller 失效
    快速训练回波消除器

    公开(公告)号：US4987569A

    公开(公告)日：1991-01-22

    申请号：US333992

    申请日：1989-04-05

    申请人： Fuyun Ling ,  Guozhu Long

    发明人： Fuyun Ling ,  Guozhu Long

    IPC分类号： G06F17/10 ,  H04B3/23

    CPC分类号： H04B3/237 ,  H04B3/238

    摘要： An echo cancellation modem having a fast training echo canceller in which the echo cancellation coefficients are computed by taking correlations between a complex, periodic training signal sequence and a real component of the corresponding echo signal. The modem includes a receiver circuit for detecting a signal on a channel possibly including an echo; an echo canceller for estimating the real component of the echo signal; training circuitry for applying the complex training sequence to the channel and for taking correlations between the training sequence and the real component of the corresponding echo signal. The modem also includes a computational element for computing the period of the periodic sequence, generating the complex periodic train sequence in real time and for computing a phase roll frequency based upon the computed echo cancellation coefficients.

    Channel handoff methods in wireless broadcast systems
    4.
    发明授权
    Channel handoff methods in wireless broadcast systems 有权
    无线广播系统中的信道切换方法

    公开(公告)号：US09554319B2

    公开(公告)日：2017-01-24

    申请号：US11828333

    申请日：2007-07-25

    申请人： Linbo Li ,  Ashok Mantravadi ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

    发明人： Linbo Li ,  Ashok Mantravadi ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

    IPC分类号： H04Q7/20 ,  H04W36/28 ,  H04W36/30 ,  H04W72/08

    CPC分类号： H04W36/28 ,  H04W36/30 ,  H04W72/085

    摘要： Systems and methodologies are described that facilitate monitoring RF channels in a wireless communication environment to determine whether one or more channels comprise a forward-link-only (FLO) signal. A receiver can receive a first RF channel with a FLO signal and can monitor other RF channels for FLO signals. Upon a determination that a monitored RF channel comprises a FLO signal, the receiver can switch between the first RF channel and the monitored RF channel, employing information on current MLC decoding status, to facilitate providing seamless reception of the FLO signal, which can be superframe synchronized between RF channels. FLO signal detection can be performed using one or more of a wide-area identification channel energy detection protocol and a wide-area overhead information symbol decoding error detection protocol.

    摘要翻译： 描述了便于在无线通信环境中监视RF信道以确定一个或多个信道是包括仅前向链路（FLO）信号的系统和方法。 接收机可以接收具有FLO信号的第一RF信道，并且可以监视FLO信号的其他RF信道。 在确定被监视的RF信道包括FLO信号之后，接收机可以使用关于当前MLC解码状态的信息在第一RF信道和被监控的RF信道之间切换，以便于提供FLO信号的无缝接收，其可以是超帧 在RF信道之间同步。 可以使用广域识别信道能量检测协议和广域开销信息符号解码错误检测协议中的一个或多个来执行FLO信号检测。

    INITIALIZATION OF TIMING RECOVERY AND DECISION-FEEDBACK EQUALIZATION IN A RECEIVER
    5.
    发明申请
    INITIALIZATION OF TIMING RECOVERY AND DECISION-FEEDBACK EQUALIZATION IN A RECEIVER 审中-公开
    定时恢复的初始化和接收方的决策反馈均衡

    公开(公告)号：US20150326382A1

    公开(公告)日：2015-11-12

    申请号：US14763798

    申请日：2013-01-28

    申请人： Jian LI ,  Yisheng XUE ,  Michael M. FAN ,  Jilei HOU ,  Yin Huang ,  Fuyun Ling ,  QUALCOMM INCORPORATED

    发明人： Jian Li ,  Yin Huang ,  Yisheng Xue ,  Michael M. Fan ,  Fuyun Ling ,  Jilei Hou

    IPC分类号： H04L7/00 ,  H04L25/03

    CPC分类号： H04L7/0004 ,  H04L25/03 ,  H04L25/0305 ,  H04L25/0307 ,  H04L2025/03656

    摘要： A method of initializing a receiver is performed during an initialization mode. Timing offset values for a timing recovery circuit are repeatedly selected. For each selected timing offset value, timing recovery is performed using the timing offset value and groups of weights for a decision feedback equalizer are repeatedly selected. Each selected group of weights is used to perform blind decision feedback equalization. For each selected group of weights, a metric indicating data reception quality is computed. A timing offset value and a group of weights are chosen based on the computed metrics.

    摘要翻译： 在初始化模式期间执行初始化接收机的方法。 定时恢复电路的定时偏移值被重复选择。 对于每个选择的定时偏移值，使用定时偏移值执行定时恢复，并且重复地选择用于判决反馈均衡器的权重组。 每个选择的权重组用于执行盲判决反馈均衡。 对于每个选择的权重组，计算指示数据接收质量的度量。 基于所计算的度量来选择定时偏移值和权重组。