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。

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。

公开(公告)号：US07688899B2

公开(公告)日：2010-03-30

申请号：US09860274

申请日：2001-05-17

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

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

IPC分类号： H04K1/10

CPC分类号： 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

摘要： 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.

摘要翻译： 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最佳信道并且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相匹配的综合益处，实现了改进的性能。

公开(公告)号：US20100074351A1

公开(公告)日：2010-03-25

申请号：US12499951

申请日：2009-07-09

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

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

IPC分类号： H04L27/28

CPC分类号： 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

摘要： 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.

公开(公告)号：US20100074317A1

公开(公告)日：2010-03-25

申请号：US12235553

申请日：2008-09-22

申请人： Thomas Sun ,  Raghuraman Krishnamoorthi ,  Fuyun Ling ,  Krishna Kizon Mukkavilli ,  Tao Tian ,  Bojan Vrcelj

发明人： Thomas Sun ,  Raghuraman Krishnamoorthi ,  Fuyun Ling ,  Krishna Kizon Mukkavilli ,  Tao Tian ,  Bojan Vrcelj

IPC分类号： H04L27/01

CPC分类号： H04L25/0212 ,  H04L25/0204 ,  H04L25/0216

摘要： Methods and systems are described for processing a signal in wireless communications. The signal may have synchronization information. A method of processing a signal having synchronization information may include receiving the signal, and determining a truncation region of the time domain estimated channel, the estimated channel having taps. The method further includes processing the channel taps within the truncation region.

摘要翻译： 描述了用于处理无线通信中的信号的方法和系统。 该信号可以具有同步信息。 处理具有同步信息的信号的方法可以包括接收信号，以及确定时域估计信道的截断区域，估计信道具有抽头。 该方法还包括处理截断区域内的信道抽头。

公开(公告)号：US20090279471A1

公开(公告)日：2009-11-12

申请号：US12506055

申请日：2009-07-20

申请人： Rajiv Vijayan ,  Fuyun Ling ,  Gordon Kent Walker ,  Ramaaswamy Murali ,  Ashok Mantravadi ,  Anand Subramaniam ,  Krishnamurthy Viswanathan

发明人： Rajiv Vijayan ,  Fuyun Ling ,  Gordon Kent Walker ,  Ramaaswamy Murali ,  Ashok Mantravadi ,  Anand Subramaniam ,  Krishnamurthy Viswanathan

IPC分类号： H04H20/71 ,  H04L27/28

CPC分类号： H04L5/0041 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0048 ,  H04L12/189 ,  H04W72/005

摘要： 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.

摘要翻译： 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：US20090245154A1

公开(公告)日：2009-10-01

申请号：US12334436

申请日：2008-12-12

申请人： Krishna Kiran Mukkavilli ,  Ashok Mantravadi ,  Durk L. van Veen ,  Murali Ramaswamy Chari ,  Raghuraman Krishnamoorthi ,  Rajeev Krishnamurthi ,  Fuyun Ling

发明人： Krishna Kiran Mukkavilli ,  Ashok Mantravadi ,  Durk L. van Veen ,  Murali Ramaswamy Chari ,  Raghuraman Krishnamoorthi ,  Rajeev Krishnamurthi ,  Fuyun Ling

IPC分类号： H04H20/71 ,  H04J11/00

CPC分类号： H04L23/02 ,  H04L5/0053 ,  H04L25/0206 ,  H04L25/0218 ,  H04L25/023 ,  H04L27/2613 ,  H04L27/2647

摘要： In a multicasts wireless telecommunication system providing an aggregation of one or more independent data components as a flow, wherein the OIS is located at the latch point of the beginning of the superframe, and the OIS programming is latched at the superframe boundary, the improvement of deriving signal parameter information from Signaling Parameter Channel (SPC) symbols transmitted in a Forward Link only (FLO) network by deriving a time domain channel estimate by assuming each of the combinations for the signal parameter field in the scrambler seed and picking the signal parameter combination that yields the most energy in the time domain above a threshold value.

摘要翻译： 在提供作为流的一个或多个独立数据组件的聚合的组播无线电信系统中，其中OIS位于超帧开始的锁存点处，并且OIS编程在超帧边界处被锁存， 通过通过假设加扰器种子中的信号参数字段的每个组合并且选择信号参数组合来导出时域信道估计，从​​在仅前向链路（FLO）网络中发送的信令参数信道（SPC）符号中导出信号参数信息 其在时域中产生的能量大于阈值以上。

公开(公告)号：US20090190675A1

公开(公告)日：2009-07-30

申请号：US11933231

申请日：2007-10-31

申请人： Fuyun Ling ,  Alok Kumar Gupta ,  Raghuraman Krishnamoorthi ,  Ramaswamy Murali ,  Murali Ramaswamy Chari ,  Rajiv Vijayan ,  Bojan Vrcelj

发明人： Fuyun Ling ,  Alok Kumar Gupta ,  Raghuraman Krishnamoorthi ,  Ramaswamy Murali ,  Murali Ramaswamy Chari ,  Rajiv Vijayan ,  Bojan Vrcelj

IPC分类号： H04L27/28 ,  H04J3/06

CPC分类号： H04L27/2675 ,  H04L5/0007 ,  H04L5/0051 ,  H04L5/0064 ,  H04L7/042 ,  H04L25/0212 ,  H04L25/0216 ,  H04L25/0224 ,  H04L25/0226 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2662

摘要： In an OFDM system, a transmitter broadcasts a first TDM pilot on a first set of subbands followed by a second TDM pilot on a second set of subbands in each frame. The subbands in each set are selected from among N total subbands such that (1) an OFDM symbol for the first TDM pilot contains at least S1 identical pilot-1 sequences of length L1 and (2) an OFDM symbol for the second TDM pilot contains at least S2 identical pilot-2 sequences of length L2, where L2>L1, S1·L1=N, and S2·L2=N. The transmitter may also broadcast an FDM pilot. A receiver processes the first TDM pilot to obtain frame timing (e.g., by performing correlation between different pilot-1 sequences) and further processes the second TDM pilot to obtain symbol timing (e.g., by detecting for the start of a channel impulse response estimate derived from the second TDM pilot).

摘要翻译： 在OFDM系统中，发射机在第一组子带上广播第一TDM导频，随后在每帧中的第二组子带上接收第二TDM导频。 每个组中的子带从N个总子带中选出，使得（1）第一TDM导频的OFDM符号包含长度为L1的至少S1个相同的导频1序列，以及（2）第二TDM导频的OFDM符号包含 至少S2个长度为L2的导频-2序列，其中L2> L1，S1.L1 = N，S2.L2 = N。 发射机还可以广播FDM导频。 接收机处理第一TDM导频以获得帧定时（例如，通过执行不同导频-1序列之间的相关）并且进一步处理第二TDM导频以获得符号定时（例如，通过检测导出的信道脉冲响应估计的开始 从第二TDM导频）。

公开(公告)号：US20090028256A1

公开(公告)日：2009-01-29

申请号：US11834653

申请日：2007-08-06

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

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

IPC分类号： H04L27/28

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

摘要： 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.

摘要翻译： 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：US20080291860A1

公开(公告)日：2008-11-27

申请号：US11751631

申请日：2007-05-21

申请人： Rajiv Vijayan ,  Aamod Khandekar ,  Fuyun Ling ,  Gordon Kent Walker ,  Ramaswamy Murali

发明人： Rajiv Vijayan ,  Aamod Khandekar ,  Fuyun Ling ,  Gordon Kent Walker ,  Ramaswamy Murali

IPC分类号： H04J3/24

CPC分类号： H04W52/0209 ,  H04B7/12 ,  H04L1/0057 ,  H04L1/0065 ,  H04L1/0071 ,  H04L1/0083 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/06 ,  H04L25/0224 ,  H04L27/2602 ,  H04N21/2383 ,  H04N21/4382 ,  H04N21/6112 ,  H04W4/06 ,  H04W28/06 ,  H04W72/04 ,  Y02D70/166 ,  Y02D70/168 ,  Y02D70/442

摘要： Techniques for multiplexing and transmitting multiple data streams are described. Transmission of the multiple data streams occurs in “super-frames”. Each super-frame has a predetermined time duration and is further divided into multiple (e.g., four) frames. Each data block for each data stream is outer encoded to generate a corresponding code block. Each code block is partitioned into multiple subblocks, and each data packet in each code block is inner encoded and modulated to generate modulation symbols for the packet. The multiple subblocks for each code block are transmitted in the multiple frames of the same super-frame, one subblock per frame. Each data stream is allocated a number of transmission units in each super-frame and is assigned specific transmission units to achieve efficient packing. A wireless device can select and receive individual data streams.

摘要翻译： 描述用于复用和传输多个数据流的技术。 多个数据流的传输发生在“超帧”中。 每个超帧具有预定的持续时间并进一步分为多个（例如，四个）帧。 每个数据流的每个数据块被外部编码以生成相应的代码块。 每个码块被划分成多个子块，并且每个码块中的每个数据分组被内部编码和调制以产生分组的调制符号。 每个码块的多个子块在相同超帧的多个帧中传送，每帧一个子块。 每个数据流在每个超帧中被分配多个传输单元，并被分配特定的传输单元以实现有效的打包。 无线设备可以选择和接收各个数据流。