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    Method and apparatus for combined puncturing and repeating of code symbols in a communications system
    1.
    发明授权
    Method and apparatus for combined puncturing and repeating of code symbols in a communications system 有权
    用于在通信系统中组合穿孔和重复代码符号的方法和装置

    公开(公告)号：US06675347B1

    公开(公告)日：2004-01-06

    申请号：US09618952

    申请日：2000-07-19

    申请人： Leonid Razoumov ,  Fuyun Ling ,  Stein Lundby

    发明人： Leonid Razoumov ,  Fuyun Ling ,  Stein Lundby

    IPC分类号： H03M1303

    CPC分类号： H04L1/0069

    摘要： Techniques for puncturing symbols in a communications system are disclosed. S symbols are received for a frame having a capacity of N symbols, with S being greater than N. P symbols need to be punctured so that remaining symbols fit into the frame. A number of puncture distances, D1 through DN, are computed based on S and P. A particular number of symbol punctures is determined for each computed puncture distance. P1 through PN symbol punctures are then performed at the distances of D1 through DN, respectively. For a more even distribution of the symbol punctures, each of the distances D1 through DN can be selected to be greater than or equal to a minimum puncture distance Dmin defined as Dmin=└S/P┘, where └ ┘ denotes a floor operator. The symbol punctures at each computed distance can be performed together or distributed with symbol punctures at other distances. In the alternative, an accumulator is configured to wrap around after it has been incremented to a value of S, each increment being of size P. A symbol index is incremented by one each time the accumulator is incremented by P, until the symbol index exceeds the value S. The process is advantageously begun with a puncture. Each time the accumulator wraps around, another puncture is performed. As another alternative, puncturing can be combined with symbol repetition.

    摘要翻译： 公开了一种在通信系统中对符号进行穿孔的技术。 对于具有N个符号的容量的帧接收S个符号，其中S大于N.P个符号需要被穿孔，使得剩余符号适合于帧。 基于S和P计算多个穿刺距离D1至DN。针对每个计算的穿刺距离确定特定数量的符号穿孔。 然后分别在D1到DN的距离处执行P1到PN符号穿孔。 为了更均匀地分配符号穿孔，可以将距离D1至DN中的每一个选择为大于或等于定义为Dmin =└S/ P“的最小穿孔距离Dmin，其中└表示地板操作者。 在每个计算距离处的符号穿孔可以一起执行或者以其他距离的符号穿孔分布。 在替代方案中，累加器被配置为在已经增加到S的值之后包围，每个增量为大小P.每当累加器递增P时，符号索引增加1，直到符号索引超过 值S.该方法有利地开始穿刺。 每次蓄能器包裹时，都会进行另一次穿刺。 作为另一种选择，穿孔可以与符号重复组合。

    Method and apparatus for puncturing code symbols in a communications system
    2.
    发明授权
    Method and apparatus for puncturing code symbols in a communications system 有权
    用于在通信系统中对代码符号进行删截的方法和装置

    公开(公告)号：US06614850B1

    公开(公告)日：2003-09-02

    申请号：US09612158

    申请日：2000-07-07

    申请人： Leonid Razoumov ,  Fuyun Ling

    发明人： Leonid Razoumov ,  Fuyun Ling

    IPC分类号： H04L2700

    CPC分类号： H04L1/0068 ,  H04L1/0041 ,  H04L1/0059 ,  H04L1/0071 ,  H04L1/08

    摘要： Techniques for puncturing symbols in a communications system. S symbols are received for a frame having a capacity of N symbols, with S being greater than N. P symbols need to be punctured so that remaining symbols fit into the frame. A number of puncture distances, D1 through DN, are computed based on S and P. A particular number of symbol punctures is determined for each computed puncture distance. P1 through PN symbol punctures are then performed at the distances of D1 through DN, respectively. For a more even distribution of the symbol punctures, each of the distances D1 through DN can be selected to be greater than or equal to a minimum puncture distance Dmin defined as Dmin=└S/P┘, where └ ┘ denotes a floor operator. The symbol punctures at each computed distance can be performed together or distributed with symbol punctures at other distances. In the alternative, an accumulator is configured to wrap around after it has been incremented to a value of S, each increment being of size P. A symbol index is incremented by one each time the accumulator is incremented by P, until the symbol index exceeds the value S. The process is advantageously begun with a puncture. Each time the accumulator wraps around, another puncture is performed.

    摘要翻译： 在通信系统中穿孔符号的技术。 对于具有N个符号的容量的帧接收S个符号，其中S大于N.P个符号需要被穿孔，使得剩余符号适合于帧。 基于S和P计算多个穿刺距离D1至DN。针对每个计算的穿刺距离确定特定数量的符号穿孔。 然后分别在D1到DN的距离处执行P1到PN符号穿孔。 为了更均匀地分配符号穿孔，可以将距离D1至DN中的每一个选择为大于或等于定义为Dmin =└S/ P“的最小穿孔距离Dmin，其中└表示地板操作者。 在每个计算距离处的符号穿孔可以一起执行或者以其他距离的符号穿孔分布。 在替代方案中，累加器被配置为在已经增加到S的值之后包围，每个增量为大小P.每当累加器递增P时，符号索引增加1，直到符号索引超过 值S.该方法有利地开始穿刺。 每次蓄能器包裹时，都会进行另一次穿刺。

    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.