公开(公告)号：US08355354B2

公开(公告)日：2013-01-15

申请号：US12646520

申请日：2009-12-23

Applicant: Rajiv Vijayan ,  Fuyun Ling ,  Gordon K. Walker ,  Murali R. Chari ,  Ashok Mantravadi ,  Anand D. Subramaniam

Inventor： Rajiv Vijayan ,  Fuyun Ling ,  Gordon K. Walker ,  Murali R. Chari ,  Ashok Mantravadi ,  Anand D. Subramaniam

IPC: H04H20/71

CPC classification number: H04L5/0041 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0048 ,  H04L12/189 ,  H04W72/005

Abstract: To broadcast different types of transmission having different tiers of coverage in a wireless broadcast network, each base station processes data for a wide-area transmission in accordance with a first mode (or coding and modulation scheme) to generate data symbols for the wide-area transmission and processes data for a local transmission in accordance with a second mode to generate data symbols for the local transmission. The first and second modes are selected based on the desired coverage for wide-area and local transmissions, respectively. The base station also generates pilots and overhead information for local and wide-area transmissions. The data, pilots, and overhead information for local and wide-area transmissions are multiplexed onto their transmission spans, which may be different sets of frequency subbands, different time segments, or different groups of subbands in different time segments. More than two different types of transmission may also be multiplexed and broadcast.

Abstract translation: 为了在无线广播网络中广播具有不同层次的不同类型的传输，每个基站根据第一模式（或编码和调制方案）处理广域传输的数据，以产生广域的数据符号 根据第二模式传输和处理用于本地传输的数据，以产生用于本地传输的数据符号。 分别基于广域和本地传输的期望覆盖来选择第一和第二模式。 基站还为本地和广域传输生成导频和开销信息。 用于本地和广域传输的数据，导频和开销信息被复用到它们的传输跨度，其可以是不同组的频率子带，不同时间段或不同时间段中的不同子带组。 多于两种不同类型的传输也可以被复用和广播。

公开(公告)号：US08311133B2

公开(公告)日：2012-11-13

申请号：US11834653

申请日：2007-08-06

Applicant: Durk L. van Veen ,  Ashok Mantravadi ,  Raghuraman Krishnamoorthi ,  Murali Ramaswamy Chari ,  Krishna Kiran Mukkavilli ,  Fuyun Ling

Inventor： Durk L. van Veen ,  Ashok Mantravadi ,  Raghuraman Krishnamoorthi ,  Murali Ramaswamy Chari ,  Krishna Kiran Mukkavilli ,  Fuyun Ling

IPC: H04L27/28 ,  H04B7/216

CPC classification number: H04L27/2613 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/008 ,  H04L5/0094 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/2628 ,  H04L27/2647 ,  H04L27/2656

Abstract: A new channel is added to FLO networks that carries embedded signaling parameter information. The design is such that regardless of the actual values of the signaling parameters conveyed, a receiver will be able to demodulate this new channel. Moreover, the addition of the new channel does not render a FLO network that has been so configured to not be backwards-compatible with existing devices.

Abstract translation: 一个新的信道被添加到携带嵌入式信令参数信息的FLO网络中。 这种设计使得无论传达的信令参数的实际值如何，接收机将能够解调这个新的信道。 此外，添加新频道并不会使FLO网络被配置为不与现有设备向后兼容。

公开(公告)号：US08250428B2

公开(公告)日：2012-08-21

申请号：US12276313

申请日：2008-11-22

Applicant: Thomas Sun ,  Fuyun Ling ,  Jing Jiang ,  Raghuraman Krishnamoorthi ,  Tao Tian ,  Kent Walker

Inventor： Thomas Sun ,  Fuyun Ling ,  Jing Jiang ,  Raghuraman Krishnamoorthi ,  Tao Tian ,  Kent Walker

IPC: H03M13/00

CPC classification number: H04L1/0071 ,  H03M13/27 ,  H03M13/2957 ,  H04L1/0041 ,  H04L2001/0098

Abstract: Methods and systems are described for scheduling data in an FLO system. The method may include turbo encoding the data, and dividing a packet of the turbo-coded data into a plurality of subpackets. The method may include scheduling the turbo-coded packet of data so as to distribute the data across multiple frames of a superframe, by transmitting each one of the subpackets during a different frame of the superframe to increase time diversity. The turbo-coded packet of data may comprise systematic bits and parity bits. The method may include separately scheduling the systematic bits and the parity bits during different frames of the superframe.

Abstract translation: 描述了用于在FLO系统中调度数据的方法和系统。 该方法可以包括对数据进行turbo编码，并将turbo编码数据的分组划分成多个子分组。 该方法可以包括通过在超帧的不同帧期间发送每个子分组以增加时间分集来调度数据的turbo编码分组以便分布跨超帧的多个帧的数据。 turbo编码的数据分组可以包括系统比特和奇偶校验比特。 该方法可以包括在超帧的不同帧期间单独地调度系统比特和奇偶校验比特。

公开(公告)号：US08229708B2

公开(公告)日：2012-07-24

申请号：US11563627

申请日：2006-11-27

Applicant: Ashok Mantravadi ,  Fuyun Ling ,  Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi

Inventor： Ashok Mantravadi ,  Fuyun Ling ,  Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi

IPC: G01R15/00 ,  G01R21/00 ,  H04B15/00 ,  H04B1/10 ,  H04B3/46 ,  H04B1/00 ,  H04B17/00 ,  H04B1/04 ,  H04B1/12 ,  H04L25/08

CPC classification number: H04B1/1027

Abstract: Methods and apparatus for signal and interference energy estimation in a communication system. In an aspect, a method includes setting a threshold value, and comparing a channel estimate to the threshold value to determine an interference estimate (Iest). The method also includes averaging the interference estimate (Iest) to determine average channel interference (Ic), and determining interference energy (I) based on the interference estimate (Iest) and the average channel interference (Ic). In another aspect, an apparatus includes threshold logic configured to set a threshold value and compare a channel estimate to the threshold value to determine an interference estimate (Iest). The apparatus includes averaging logic configured to average the interference estimate (Iest) to determine average channel interference (Ic), and summing logic configured to determine interference energy (I) based on the interference estimate (Iest) and average channel interference (Ic).

Abstract translation: 通信系统中信号和干扰能量估计的方法和装置。 一方面，一种方法包括设置阈值，以及将信道估计与阈值进行比较以确定干扰估计（Iest）。 该方法还包括对干扰估计（Iest）进行平均以确定平均信道干扰（Ic），以及基于干扰估计（Iest）和平均信道干扰（Ic）来确定干扰能量（I）。 在另一方面，一种装置包括阈值逻辑，其被配置为设置阈值并将信道估计与阈值进行比较以确定干扰估计（Iest）。 该装置包括被配置为平均干扰估计（Iest）以确定平均信道干扰（Ic）的平均逻辑，以及被配置为基于干扰估计（Iest）和平均信道干扰（Ic））来确定干扰能量（I）的求和逻辑。

公开(公告)号：US08175123B2

公开(公告)日：2012-05-08

申请号：US11371837

申请日：2006-03-08

Applicant: Bojan Vrcelj ,  Ashok Mantravadi ,  Fuyun Ling ,  Rajiv Vijayan ,  Michael Mao Wang

Inventor： Bojan Vrcelj ,  Ashok Mantravadi ,  Fuyun Ling ,  Rajiv Vijayan ,  Michael Mao Wang

IPC: H04J3/08

CPC classification number: H04L27/2662 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0216 ,  H04L25/022 ,  H04L25/0228 ,  H04L27/261 ,  H04L27/265 ,  H04L27/2665 ,  H04L27/2679

Abstract: A method for positioning a collection window for a Fourier transform function is disclosed. A first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol are received. The first OFDM symbol comprises a plurality of frequency division multiplexed (FDM) symbols. The first OFDM symbol is characterized by at least two of the following: a delay spread, a first arriving path (FAP), or a last arriving path (LAP). A channel location is estimated from a channel impulse response. A point relative to the channel location is selected. A beginning of the collection window is positioned for the second OFDM symbol at the selected point. Alternatively, a point is selected at a first location relative to the channel location using a first algorithm if a delay spread is less than a predetermined length. The selected point is chosen at a second location relative to the channel location using a second algorithm if the delay spread is greater than the predetermined length.

Abstract translation: 公开了一种用于定位用于傅立叶变换函数的收集窗口的方法。 接收第一正交频分复用（OFDM）符号和第二OFDM符号。 第一OFDM符号包括多个频分复用（FDM）符号。 第一OFDM符号的特征在于以下至少两个：延迟扩展，第一到达路径（FAP）或最后到达路径（LAP）。 从信道脉冲响应估计信道位置。 选择相对于通道位置的点。 收集窗口的开始位于所选点处的第二OFDM符号。 或者，如果延迟扩展小于预定长度，则使用第一算法在相对于信道位置的第一位置处选择点。 如果延迟扩展大于预定长度，则使用第二算法在相对于信道位置的第二位置处选择所选择的点。

公开(公告)号：US20110047434A1

公开(公告)日：2011-02-24

申请号：US12913422

申请日：2010-10-27

Applicant: GORDON KENT WALKER ,  Fuyun Ling

Inventor： GORDON KENT WALKER ,  Fuyun Ling

IPC: H03M13/05 ,  G06F11/10

CPC classification number: H03M13/2957 ,  H03M13/6538 ,  H04L1/0066 ,  H04L1/0071

Abstract: In an ATSC M/H wireless broadcast system, data for transmission is turbo encoded into turbo-encoded data blocks. The turbo-coded data blocks are processed for transmission by scheduling a plurality of portions of the block for transmission during respectively corresponding transmit intervals that are temporally separated from one another. The portions of the turbo-encoded blocks may then be transmitted during the respectively corresponding transmit intervals according to the schedule. The turbo-encoded blocks may be interleaved before portions of the blocks are scheduled for transmission.

Abstract translation: 在ATSC M / H无线广播系统中，用于传输的数据被turbo编码为turbo编码数据块。 通过在时间上彼此分离的相应的发送间隔期间调度用于发送的块的多个部分来处理turbo编码的数据块以进行发送。 然后可以根据时间表在分别对应的发射间隔期间传输turbo编码块的部分。 在部分块被调度用于传输之前，turbo编码的块可以被交织。

公开(公告)号：US07725799B2

公开(公告)日：2010-05-25

申请号：US11096320

申请日：2005-03-31

Applicant: Gordon Kent Walker ,  Rajiv Vijayan ,  Seong Taek Chung ,  Murali Ramaswamy Chari ,  Fuyun Ling

Inventor： Gordon Kent Walker ,  Rajiv Vijayan ,  Seong Taek Chung ,  Murali Ramaswamy Chari ,  Fuyun Ling

IPC: H03M13/00 ,  H03M13/03

CPC classification number: H04L27/3488 ,  H04W52/0245 ,  Y02D70/00

Abstract: A wireless communication apparatus in a hierarchically coded modulation system can use error control mechanisms generated during decoding of base layer information to predict a probability of successful demodulation of enhancement layer information. Performance in the demodulation of the base layer correlates to performance in the demodulation of the enhancement layer. The receiver can determine whether to attempt demodulation of temporally correlated enhancement layer data based in part on the predicted probability of success. If the receiver determines not to demodulate the enhancement layer, the receiver can power down the enhancement layer demodulator, or otherwise minimize the power expended in the enhancement layer demodulator.

Abstract translation: 分级编码调制系统中的无线通信装置可以使用在解码基层信息期间产生的误差控制机制来预测增强层信息的成功解调的概率。 基层解调性能与增强层解调性能有关。 接收机可以部分地基于预测的成功概率来确定是否尝试对时间相关的增强层数据的解调。 如果接收机确定不解调增强层，则接收机可以将增强层解调器断电，或以其他方式最小化增强层解调器中消耗的功率。

公开(公告)号：US07720185B2

公开(公告)日：2010-05-18

申请号：US11557035

申请日：2006-11-06

Applicant: Bojan Vrcelj ,  Ashok Mantravadi ,  Fuyun Ling ,  Linbo Li ,  Raghuraman Krishnamoorthi ,  Murali Ramaswamy Chari ,  Vinay Murthy

Inventor： Bojan Vrcelj ,  Ashok Mantravadi ,  Fuyun Ling ,  Linbo Li ,  Raghuraman Krishnamoorthi ,  Murali Ramaswamy Chari ,  Vinay Murthy

IPC: H04B1/10

CPC classification number: H04L25/03044 ,  H04B1/1036 ,  H04B1/109 ,  H04B15/00 ,  H04B2215/061 ,  H04L2025/03477

Abstract: The disclosure is directed to a receiver. The receiver includes an interference canceller configured to filter digital samples produced from a modulated signal transmitted over a wireless channel, and a digital variable gain amplifier (DVGA) configured to amplify the filtered digital samples.

Abstract translation: 本公开涉及一种接收机。 接收机包括被配置为对通过无线信道传输的调制信号产生的数字样本进行滤波的干扰消除器，以及被配置成放大经滤波的数字样本的数字可变增益放大器（DVGA）。

公开(公告)号：US20100104039A1

公开(公告)日：2010-04-29

申请号：US12559318

申请日：2009-09-14

Applicant: John W. Ketchum ,  Steven J. Howard ,  Jay Rod Walton ,  Mark S. Wallace ,  Fuyun Ling

Inventor： John W. Ketchum ,  Steven J. Howard ,  Jay Rod Walton ,  Mark S. Wallace ,  Fuyun Ling

IPC: H04B7/02 ,  H04B15/00

CPC classification number: H04W52/346 ,  H04L1/0009 ,  H04L1/0068 ,  H04L1/06 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/06 ,  H04L25/03343 ,  H04L2001/0096 ,  H04W52/24 ,  H04W52/42

Abstract: Techniques to process data for transmission over a set of transmission channels selected from among all available transmission channels. In an aspect, the data processing includes coding data based on a common coding and modulation scheme to provide modulation symbols and pre-weighting the modulation symbols for each selected channel based on the channel's characteristics. The pre-weighting may be achieved by “inverting” the selected channels so that the received SNRs are approximately similar for all selected channels. With selective channel inversion, only channels having SNRs at or above a particular threshold are selected, “bad” channels are not used, and the total available transmit power is distributed across only “good” channels. Improved performance is achieved due to the combined benefits of using only the NS best channels and matching the received SNR of each selected channel to the SNR required by the selected coding and modulation scheme.

Abstract translation: 用于处理数据以在从所有可用传输信道中选择的一组传输信道上进行传输的技术。 在一方面，数据处理包括基于公共编码和调制方案的编码数据，以提供调制符号并且基于该信道的特征对每个所选择的信道预先加权调制符号。 预加权可以通过“反转”所选择的信道来实现，使得接收的SNR对于所有选择的信道大致相似。 通过选择性信道反转，仅选择具有等于或高于特定阈值的SNR的信道，不使用“坏”信道，并且总可用发射功率仅在“良好”信道上分布。 由于仅使用NS最佳通道并将每个所选信道的接收SNR与所选择的编码和调制方案所需的SNR相匹配的优点，可以实现改进的性能。

公开(公告)号：US20100093387A1

公开(公告)日：2010-04-15

申请号：US12636497

申请日：2009-12-11

Applicant: Tao Chen ,  Jack M. Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles E. Wheatley, III

Inventor： Tao Chen ,  Jack M. Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles E. Wheatley, III

IPC: H04B7/00 ,  H04B17/00

CPC classification number: H04W52/12 ,  H04L1/0051 ,  H04L1/0066 ,  H04L1/208 ,  H04W52/20 ,  H04W52/36

Abstract: Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power surplus/deficit indicative of the difference between the received signal quality and the setpoint, setpoint surplus/deficit indicative of the difference between the setpoint and a threshold Eb/Nt needed for the desired level of performance, or a combination thereof. The metrics may include re-encoded symbol error rate, re-encoded power metric, modified Yamamoto metric, minimum or average LLR among decoded bits, number of decoding iterations, and possibly others. The setpoint may be adjusted in different manners and/or by different amounts depending on the above-noted factors. The techniques may be employed for forward and/or reverse links in CDMA systems.

Abstract translation: 调整无线通信系统中功率控制回路设定值的技术。 可以基于指示擦除/良好解码帧的帧状态来调整设定点，指示解码结果的置信度的一个或多个（通常为软）度量，指示接收信号质量与设定点之间的差异的功率余量/ ，表示设定值与所需性能水平所需的阈值Eb / Nt之间的差异的设定值剩余/缺失，或其组合。 度量可以包括重新编码的符号错误率，重新编码的功率度量，修改的Yamamoto度量，解码比特中的最小或平均LLR，解码迭代次数，以及可能的其他值。 可以根据上述因素以不同的方式和/或不同的量调节设定点。 这些技术可以用于CDMA系统中的前向和/或反向链路。