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    Apparatus and methods for interleaving in a forward link only system
    1.
    发明授权
    Apparatus and methods for interleaving in a forward link only system 失效
    仅在前向链路系统中交织的装置和方法

    公开(公告)号：US08612820B2

    公开(公告)日：2013-12-17

    申请号：US12756917

    申请日：2010-04-08

    申请人： Durk L. van Veen ,  Murali R. Chari ,  Thomas Sun

    发明人： Durk L. van Veen ,  Murali R. Chari ,  Thomas Sun

    IPC分类号： G06F11/00

    CPC分类号： H03M13/2771 ,  H03M13/2703 ,  H03M13/271 ,  H03M13/2735 ,  H03M13/296 ,  H03M13/6561 ,  H04L1/0065 ,  H04L1/0066 ,  H04L1/0071

    摘要： Methods and devices for encoding and interleaving data packets for broadcast and for de-interleaving and decoding data packets in a communication system eliminate detrimental biasing effects by using pseudo-random M-sequence bit encoding as part of the turbo encoding and decoding. The use of pseudo-random M-sequence bit encoding mitigates biasing effects that may otherwise be introduced if conventional r-c interleaving is applied to long turbo encoded data which would degrade reception in the presence of broadcast interference.

    摘要翻译： 用于编码和交织用于广播的数据分组和用于在通信系统中解交织和解码数据分组的数据分组的方法和装置通过使用伪随机M序列比特编码作为turbo编码和解码的一部分来消除有害的偏置效应。 伪随机M序列比特编码的使用减轻了偏移效应，如果传统的r-c交织被应用于在存在广播干扰的情况下会降低接收的长turbo编码数据的情况下可能引入偏置效应。

    IFFT processing in wireless communications
    3.
    发明授权
    IFFT processing in wireless communications 有权
    无线通信中的IFFT处理

    公开(公告)号：US08543629B2

    公开(公告)日：2013-09-24

    申请号：US11612455

    申请日：2006-12-18

    申请人： Jai N. Subrahmanyam ,  Chinnappa K. Ganapathy ,  Durk L. Van Veen ,  Jinxia Bai ,  Kevin S. Cousineau ,  Seokyong Oh

    发明人： Jai N. Subrahmanyam ,  Chinnappa K. Ganapathy ,  Durk L. Van Veen ,  Jinxia Bai ,  Kevin S. Cousineau ,  Seokyong Oh

    IPC分类号： G06F17/14

    CPC分类号： H04L27/2626

    摘要： Techniques for perforating IFFT pipelining are described. In some aspects, the pipelining is achieved with a processing system having a memory with a first, second and third sections, an encoder configured to process data in each of the first, second and third memory sections in a round robin fashion, an IFFT configured to process the encoded data in each of the first, second, and third sections in a round robin fashion, and a post-processor configured to process the IFFT processed data in each of the first, second and third memory sections in a round robin fashion.

    摘要翻译： 描述了用于穿孔IFFT流水线的技术。 在一些方面，流水线通过具有具有第一，第二和第三部分的存储器的处理系统来实现，编码器被配置为以循环方式处理第一，第二和第三存储器部分中的每一个中的数据，IFFT被配置 以循环方式处理第一，第二和第三部分中的每一个中的编码数据，以及后处理器，其被配置为以循环方式处理第一，第二和第三存储器部分中的每一个中的经IFFT处理的数据 。

    METHODS AND APPARATUS FOR REDUCTION OF A PEAK TO AVERAGE RATIO FOR AN OFDM TRANSMIT SIGNAL
    4.
    发明申请
    METHODS AND APPARATUS FOR REDUCTION OF A PEAK TO AVERAGE RATIO FOR AN OFDM TRANSMIT SIGNAL 审中-公开
    用于减少OFDM传输信号的平均比的峰值的方法和装置

    公开(公告)号：US20110255622A1

    公开(公告)日：2011-10-20

    申请号：US13168849

    申请日：2011-06-24

    申请人： Durk L. van Veen ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

    发明人： Durk L. van Veen ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

    IPC分类号： H04J11/00

    CPC分类号： H04L27/2614 ,  H04L27/2615

    摘要： Methods and apparatus for reduction of a peak to average ratio for an OFDM transmit signal. In an aspect, a method is provided for reducing a peak to average ratio of a transmit waveform. The method includes obtaining a primary scrambler sequence, generating a secondary scrambler sequence having a length characteristic based on data to be scrambled, and combining the primary and secondary scrambler sequences to produce a PAR reduction sequence. In another aspect, an apparatus is provided for reducing a peak to average ratio of a transmit waveform. The apparatus includes a secondary generator configured to generate a secondary scrambler sequence having a length characteristic based on data to be scrambled, and combining logic configured to combine a primary scrambler sequence and the secondary scrambler sequences to produce a PAR reduction sequence.

    摘要翻译： 降低OFDM发射信号的峰均比的方法和装置。 在一方面，提供了一种降低发射波形的峰均比的方法。 该方法包括：获得主加扰器序列，产生具有基于要加扰的数据的长度特性的次扰频序列，以及组合所述主加扰序列和次加扰序列以产生PAR减少序列。 在另一方面，提供一种用于减小发射波形的峰均比的装置。 该装置包括辅助发生器，其被配置为产生具有基于要加扰的数据的长度特性的二次扰频器序列，以及被配置为组合主加扰器序列和次加扰器序列以产生PAR减少序列的组合逻辑。

    SYSTEM AND METHOD FOR THE SIMULTANEOUS TRANSMISSION AND RECEPTION OF FLO AND FIO-EV DATA
    5.
    发明申请
    SYSTEM AND METHOD FOR THE SIMULTANEOUS TRANSMISSION AND RECEPTION OF FLO AND FIO-EV DATA 审中-公开
    同时传输和接收FLO和FIO-EV数据的系统和方法

    公开(公告)号：US20110085499A1

    公开(公告)日：2011-04-14

    申请号：US12876962

    申请日：2010-09-07

    申请人： KRISHNA K. MUKKAVILLI ,  Ralph A. Gholmieh ,  Durk L. van Veen ,  Raghuraman Krishnamoorthi ,  Neville J. Meijers ,  Gordon K. Walker

    发明人： KRISHNA K. MUKKAVILLI ,  Ralph A. Gholmieh ,  Durk L. van Veen ,  Raghuraman Krishnamoorthi ,  Neville J. Meijers ,  Gordon K. Walker

    IPC分类号： H04W40/00

    CPC分类号： H04H20/30 ,  H04H60/91 ,  H04N21/235 ,  H04N21/2362 ,  H04N21/2389 ,  H04N21/435 ,  H04N21/4382 ,  H04N21/4383 ,  H04N21/4385 ,  H04W72/005 ,  H04W72/1273

    摘要： A system for transmitting a data stream, includes a transmitter for broadcasting a radio frequency communication signal comprising at least one superframe having at least a first data stream encoded therein, and overhead information carried in the superframe, the overhead information comprising a control channel, the control channel having control channel information for separating the at least one first data stream from any other data streams encoded in the at least one superframe. A system for receiving data includes a receiver configured to receive a radio frequency communication signal comprising at least one superframe having at least a first data stream encoded therein; and overhead information carried in the superframe, the overhead information comprising a control channel, the control channel having control channel information for separating the at least one first data stream from any other data streams encoded in the at least one superframe.

    摘要翻译： 一种用于发送数据流的系统，包括：发射机，用于广播包括至少一个其中编码的至少一个第一数据流的超帧的射频通信信号和在该超帧中承载的开销信息，所述开销信息包括控制信道， 控制信道具有用于将至少一个第一数据流与在至少一个超帧中编码的任何其他数据流分离的控制信道信息。 一种用于接收数据的系统包括：接收机，被配置为接收射频通信信号，所述射频通信信号包括至少一个其中编码有至少第一数据流的超帧; 以及在所述超帧中承载的开销信息，所述开销信息包括控制信道，所述控制信道具有用于将所述至少一个第一数据流与在所述至少一个超帧中编码的任何其它数据流分离的控制信道信息。

    Evaluation of transmitter performance
    6.
    发明授权
    Evaluation of transmitter performance 失效
    发射机性能评估

    公开(公告)号：US07733968B2

    公开(公告)日：2010-06-08

    申请号：US11361085

    申请日：2006-02-22

    申请人： Fuyun Ling ,  Durk L. Van Veen ,  Murali Ramaswamy Chari ,  Thomas Sun

    发明人： Fuyun Ling ,  Durk L. Van Veen ,  Murali Ramaswamy Chari ,  Thomas Sun

    IPC分类号： H04L27/28

    CPC分类号： H04L5/023 ,  H04B17/13 ,  H04B17/391 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0232 ,  H04L27/0012

    摘要： Systems and methodologies are described that facilitate monitoring transmitter performance in a wireless communication environment. A signal analyzer can be used to sample the output of a transmitter and the sampled signal can be propagated to a processor. The processor can generate frequency domain channel estimates for the subcarriers. If the transmitted modulation symbols are unknown, the processor can determine the modulation symbols and use the determined modulation symbols to calculate the channel estimates. The channel estimates can be averaged and used to generate various metrics to evaluate the transmitter performance.

    摘要翻译： 描述了便于在无线通信环境中监视发射机性能的系统和方法。 信号分析仪可用于对发射机的输出采样，采样信号可以传播到处理器。 处理器可以产生子载波的频域信道估计。 如果发送的调制符号是未知的，则处理器可以确定调制符号并使用确定的调制符号来计算信道估计。 信道估计可以被平均化并用于生成各种度量以评估发射机的性能。

    System and method of calculating noise variance
    7.
    发明授权
    System and method of calculating noise variance 失效
    噪声方差计算系统和方法

    公开(公告)号：US07693231B2

    公开(公告)日：2010-04-06

    申请号：US11453439

    申请日：2006-06-14

    申请人： Fuyun Ling ,  Thomas Sun ,  Raghuraman Krisnamoorthi ,  Durk L. van Veen ,  Murali Ramaswamy Chari

    发明人： Fuyun Ling ,  Thomas Sun ,  Raghuraman Krisnamoorthi ,  Durk L. van Veen ,  Murali Ramaswamy Chari

    IPC分类号： H04L27/00

    CPC分类号： H04L27/38 ,  H04B17/101 ,  H04B17/18 ,  H04L1/20 ,  H04L25/022

    摘要： The claimed subject matter relates to estimating noise variance associated with a transmitter. For example, the noise variance can be estimated in connection with determining performance parameters associated with a transmitter. Determining noise variance can include the acts of estimating phase alteration of a received signal through utilization of a least squares-based phase estimation algorithm. Determining noise variance can also include the act of determining an unbiased estimation of noise variance as a function of the estimated phase alteration.

    摘要翻译： 所要求保护的主题涉及估计与发射机相关的噪声方差。 例如，可以结合确定与发射机相关联的性能参数来估计噪声方差。 确定噪声方差可以包括通过利用基于最小平方的相位估计算法来估计接收信号的相位变化的动作。 确定噪声方差还可以包括确定噪声方差的无偏估计作为估计相位变化的函数的行为。

    Forward error correction in a distribution system
    8.
    发明授权
    Forward error correction in a distribution system 失效
    配电系统中的前向纠错

    公开(公告)号：US07613256B2

    公开(公告)日：2009-11-03

    申请号：US11398204

    申请日：2006-04-04

    申请人： Durk L. van Veen ,  Jai N. Subrahmanyam ,  Jinxia Bai ,  Murali Ramaswamy Chari

    发明人： Durk L. van Veen ,  Jai N. Subrahmanyam ,  Jinxia Bai ,  Murali Ramaswamy Chari

    IPC分类号： H04L27/06

    CPC分类号： H04L1/0061 ,  H04L1/0082 ,  H04L2001/0097

    摘要： A multimedia distribution system is disclosed. The distribution system includes a transmitter unit that distributes content from a content provider to one or more wireless subscriber units. The transmitter unit includes a decoder configured to determine whether a plurality of incoming packets include one or more erasures, a transmitter configured to transmit the packets to a receiving unit, and an error detection code generator configured to generate an error detection code for each of the packets transmitted to the receiver unit, the error detection code being modified for each of the erased packets so that the receiver unit will be able to identify the erased packets.

    摘要翻译： 公开了一种多媒体分发系统。 分配系统包括将内容从内容提供商分发到一个或多个无线用户单元的发射机单元。 发射机单元包括解码器，其被配置为确定多个输入分组是否包括一个或多个擦除，被配置为将分组发送到接收单元的发射机，以及错误检测码发生器，被配置为生成每个 发送到接收机单元的分组，针对每个被擦除的分组修改错误检测码，使得接收机单元将能够识别被擦除的分组。