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    Method and apparatus for using orthogonal coding in a communication system
    1.
    发明授权
    Method and apparatus for using orthogonal coding in a communication system 失效
    在通信系统中使用正交编码的方法和装置

    公开(公告)号：US5204874A

    公开(公告)日：1993-04-20

    申请号：US839528

    申请日：1992-02-19

    申请人： David D. Falconer ,  Fuyun Ling

    发明人： David D. Falconer ,  Fuyun Ling

    IPC分类号： H04J13/00 ,  H03M13/23 ,  H03M13/27 ,  H03M13/41 ,  H04J11/00 ,  H04L23/02

    CPC分类号： H03M13/23 ,  H03M13/271 ,  H03M13/41 ,  H04J13/004 ,  H04J13/12 ,  H04L23/02

    摘要： A method and apparatus is provided for encoding and decoding. In encoding, bits (202) are encoded (204) into symbols (206) such that maximum likelihood decoding is facilitated. Groups of symbols (206) are translated by either interleaving by group each group within a block (208) and subsequently deriving an orthogonal code from each group (212) or deriving an orthogonal code from each group and subsequently interleaving by code each code within a block. In decoding, groups of samples (228, 229) are transformed by either generating metrics and index symbols (242) for each group of samples (232, 234, 236, 238, 240) and subsequently deinterleaving by group each group of metrics within a block (244) or deinterleaving by group each group of samples within a block and subsequently generating metrics and index symbols for each deinterleaved group of samples. Each metric represents the confidence that a group of samples is a particular orthogonal code. Subsequently, maximum likelihood decoding (266) generates an estimated bit (268) from the index symbols and metrics (260).

    摘要翻译： 提供了一种用于编码和解码的方法和装置。 在编码中，比特（202）被编码（204）到符号（206）中，从而便于最大似然解码。 符号组（206）通过组块（208）中的每个组交织并随后从每个组（212）导出正交码或从每个组中导出正交码并随后通过代码中的每个代码在一个 块。 在解码中，通过针对每组样本（232,234,236,238,240）生成度量和索引符号（242）来变换样本组（228,229），并且随后通过组对每组样本中的每组度量进行解交织 块（244）或块中的每组样本对每组样本进行解交织，并随后为每个解交织的样本组生成度量和索引符号。 每个度量表示一组样本是特定正交码的置信度。 随后，最大似然解码（266）从索引符号和度量（260）生成估计位（268）。

    Method and apparatus for using orthogonal coding in a communication system
    2.
    发明授权
    Method and apparatus for using orthogonal coding in a communication system 失效
    在通信系统中使用正交编码的方法和装置

    公开(公告)号：US5159608A

    公开(公告)日：1992-10-27

    申请号：US751372

    申请日：1991-08-28

    申请人： David D. Falconer ,  Fuyun Ling

    发明人： David D. Falconer ,  Fuyun Ling

    IPC分类号： H03M13/23 ,  H03M13/27 ,  H03M13/41 ,  H04J11/00 ,  H04J13/00 ,  H04J13/12 ,  H04L23/02

    CPC分类号： H04L23/02 ,  H03M13/23 ,  H03M13/271 ,  H03M13/41 ,  H04J13/004 ,  H04J13/12

    摘要： A method and apparatus is provided for encoding and decoding. In encoding, bits (202) are encoded (204) into symbols (206) such that maximum likelihood decoding is facilitated. Groups of symbols (206) are translated by either interleaving by group each group within a block (208) and subsequently deriving an orthogonal code from each group (212) or deriving an orthogonal code from each group and subsequently interleaving by code each code within a block.In decoding, groups of samples (228, 229) are transformed by either generating metrics and index symbols (242) for each group of samples (232, 234, 236, 238, 240) are subsequently deinterleaving by group each group of metrics within a block (244) or deinterleaving by group each group of samples within a block and subsequently generating metrics and index symbols for each deinterleaved group of samples. Each metric represents the confidence that a group of samples is a particular orthogonal code. Subsequently, maximum likelihood decoding (266) generates an estimated bit (268) from the index symbols and metrics (260).

    摘要翻译： 提供了一种用于编码和解码的方法和装置。 在编码中，比特（202）被编码（204）到符号（206）中，从而便于最大似然解码。 符号组（206）通过组块（208）中的每个组交织并随后从每个组（212）导出正交码或从每个组中导出正交码并随后通过代码中的每个代码在一个 块。 在解码中，通过对每组样本（232,234,236,238,240）生成度量和索引符号（242）来变换样本组（228,229），随后通过组对每组样本中的每组度量进行解交织 块（244）或块中的每组样本对每组样本进行解交织，并随后为每个解交织的样本组生成度量和索引符号。 每个度量表示一组样本是特定正交码的置信度。 随后，最大似然解码（266）从索引符号和度量（260）生成估计位（268）。

    Channel handoff methods in wireless broadcast systems
    3.
    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
    4.
    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。

    Methods and apparatus for determining timing in a wireless communication system
    10.
    发明授权
    Methods and apparatus for determining timing in a wireless communication system 失效

    公开(公告)号：US08422614B2

    公开(公告)日：2013-04-16

    申请号：US12579131

    申请日：2009-10-14

    申请人： Michael M. Wang ,  Bojan Vrcelj ,  Fuyun Ling

    发明人： Michael M. Wang ,  Bojan Vrcelj ,  Fuyun Ling

    IPC分类号： H04L7/00

    CPC分类号： H04L27/2662 ,  H04L27/2676

    摘要： Methods and apparatus for setting timing of sampling of one or more symbols. The disclosed methods account for at least three types of effective interference (EI) and are used to set the timing of a sampling window for sampling received symbols. The methods includes setting timing based on determining an energy density function accounting for both static and dynamic EI, determining the minimum of a total energy profile and sliding the sampling window to ensure that the minimum point is at a predetermined point, and determining and using a composite energy profile accounting for short term and long term fading effects. The disclosed apparatus include a transceiver employing one or more of the disclosed methods for setting timing when receiving the symbols.