公开(公告)号：US06680925B2

公开(公告)日：2004-01-20

申请号：US09982239

申请日：2001-10-16

申请人： Qiang Wu ,  Nagabhushana Sindhushayana ,  Peter J. Black ,  Rajiv Vijayan ,  Rashid Attar

发明人： Qiang Wu ,  Nagabhushana Sindhushayana ,  Peter J. Black ,  Rajiv Vijayan ,  Rashid Attar

IPC分类号： H04Q700

CPC分类号： H04W36/06 ,  H04B7/0491 ,  H04W16/24

摘要： In a disclosed embodiment, signal levels of the active sectors of an access terminal are compared with the signal level of the current serving sector of the access terminal. Next, a delta credit is accumulated. If a DRC lock bit is available, then an accumulated total credit is authorized to produce an authorized accumulated total credit. Afterwards, a new serving sector is identified from a pool of candidate sectors based on the signal levels of the active sectors and the authorized accumulated total credits.

摘要翻译： 在公开的实施例中，将接入终端的活动扇区的信号电平与接入终端的当前服务扇区的信号电平进行比较。 接下来，积累了三角洲信贷。 如果DRC锁定位可用，则累积的总信用额被授权生成授权的累积总额。 之后，基于活动扇区的信号电平和授权的累计总信用，从候选扇区池中识别新的服务扇区。

公开(公告)号：US09356752B2

公开(公告)日：2016-05-31

申请号：US12948759

申请日：2010-11-18

申请人： Michael Mao Wang ,  Bojan Vrcelj ,  Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi ,  Rajiv Vijayan

发明人： Michael Mao Wang ,  Bojan Vrcelj ,  Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi ,  Rajiv Vijayan

IPC分类号： H04L5/00 ,  H04L27/26

CPC分类号： H04L5/0048 ,  H04L5/0007 ,  H04L5/0083 ,  H04L27/261

摘要： The embodiments utilize OFDM symbols to communicate network IDs. The IDs are encoded into symbols utilizing the network IDs as seeds to scramble respective pilots that are then transmitted by utilizing the symbols. The pilots can be structured into a single OFDM symbol and/or multiple OFDM symbols. The single symbol structure for transmitting the network IDs is independent of the number of network ID bits and minimizes frequency offset and Doppler effects. The multiple symbol structure allows a much coarser timing accuracy to be employed at the expense of transmitting additional symbols. Several embodiments employ a search function to find possible network ID candidates from a transmitted symbol and a selection function to find an optimum candidate from a network ID candidate list.

公开(公告)号：US08738614B2

公开(公告)日：2014-05-27

申请号：US11112238

申请日：2005-04-21

申请人： Gordon Kent Walker ,  George Alan Wiley ,  Ricardo Jorge Lopez ,  Richard Doil Lane ,  Rajiv Vijayan

发明人： Gordon Kent Walker ,  George Alan Wiley ,  Ricardo Jorge Lopez ,  Richard Doil Lane ,  Rajiv Vijayan

IPC分类号： G06F7/00 ,  G06F17/30

CPC分类号： H04L29/06027 ,  H04L65/4076 ,  H04L65/4084 ,  H04L65/4092 ,  H04L65/602 ,  H04L65/607 ,  H04N21/23614 ,  H04N21/41407 ,  H04N21/4331 ,  H04N21/4348 ,  H04N21/44016 ,  H04N21/4622 ,  H04N21/6581 ,  H04N21/8455

摘要： System for providing hierarchical services in a data network. A method is provided for inserting content into a content stream for rendering on a device. The method includes obtaining one or more annotation parameters that comprise a content identifier, and determining an insertion point indicator that indicates a location in the content stream. The method also includes retrieving the content based on the content identifier, and inserting the content in the content stream at a location indicated by the insertion point indicator.

摘要翻译： 用于在数据网络中提供分级服务的系统。 提供了一种用于将内容插入到用于在设备上呈现的内容流的方法。 该方法包括获得包含内容标识符的一个或多个注释参数，以及确定指示内容流中的位置的插入点指示符。 该方法还包括基于内容标识符检索内容，并将内容流插入到由插入点指示符指示的位置。

公开(公告)号：US20130156124A1

公开(公告)日：2013-06-20

申请号：US13767834

申请日：2013-02-14

申请人： Michael Mao Wang ,  Murali Ramaswamy Chari ,  Ashok Mantravadi ,  Fuyun Ling ,  Rajiv Vijayan ,  Raghuraman Krishnamoorthi

发明人： Michael Mao Wang ,  Murali Ramaswamy Chari ,  Ashok Mantravadi ,  Fuyun Ling ,  Rajiv Vijayan ,  Raghuraman Krishnamoorthi

IPC分类号： H04L27/26

CPC分类号： H04L27/2601 ,  H03M13/258 ,  H03M13/271 ,  H03M13/2957 ,  H03M13/31 ,  H04L1/0071 ,  H04L1/04 ,  H04L5/0007 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/0064 ,  H04L5/0083 ,  H04L27/2626 ,  H04L27/2634

摘要： A system and method for frequency diversity uses interleaving in a wireless communication system utilizing orthogonal frequency division multiplexing (OFDM) with various FFT sizes. Subcarriers of one or more interlaces are interleaved in a bit reversal fashion and the one or more interlaces are interleaved in the bit reversal fashion.

摘要翻译： 用于频率分集的系统和方法使用利用具有各种FFT大小的正交频分复用（OFDM）的无线通信系统中的交织。 一个或多个交错的子载波以位反向方式进行交织，并且该一个或多个交织以比特反转方式进行交织。

公开(公告)号：US08422434B2

公开(公告)日：2013-04-16

申请号：US10368733

申请日：2003-02-18

申请人： Rajiv Vijayan ,  Avneesh Agrawal ,  Sanjay Jha

发明人： Rajiv Vijayan ,  Avneesh Agrawal ,  Sanjay Jha

IPC分类号： H04W4/00

CPC分类号： H04W72/0453 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0066 ,  H04L27/2614 ,  H04W52/343 ,  H04W52/367

摘要： Techniques for managing peak-to-average power ratio (PAPR) for multi-carrier modulation in wireless communication systems. Different terminals in a multiple-access system may have different required transmit powers. The number of carriers to allocate to each terminal is made dependent on its required transmit power. Terminals with higher required transmit powers may be allocated fewer carriers (associated with smaller PAPR) to allow the power amplifier to operate at higher power levels. Terminals with lower required transmit powers may be allocated more carriers (associated with higher PAPR) since the power amplifier is operated at lower power levels. The specific carriers to assign to the terminals may also be determined by their transmit power levels to reduce out-of-band emissions. Terminals with higher required transmit powers may be assigned with carriers near the middle of the operating band, and terminals with lower required transmit powers may be assigned with carriers near the band edges.

摘要翻译： 用于管理无线通信系统中多载波调制的峰均功率比（PAPR）的技术。 多址系统中的不同终端可能具有不同的所需传输功率。 分配给每个终端的载波数量取决于其所需的发射功率。 具有更高所需发射功率的终端可以被分配较少的载波（与较小的PAPR相关联），以允许功率放大器在较高的功率电平下工作。 由于功率放大器在较低的功率电平下工作，所以具有较低所需发射功率的终端可以分配更多的载波（与更高的PAPR相关联）。 分配给终端的特定载波也可以由其发射功率电平来确定，以减少带外发射。 具有更高要求的发射功率的终端可以被分配到靠近工作频带中间的载波，并且具有较低所需发射功率的终端可以被分配给带边缘附近的载波。

公开(公告)号：US08144824B2

公开(公告)日：2012-03-27

申请号：US11371535

申请日：2006-03-08

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

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

IPC分类号： H04B1/10

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

摘要： A method for determining a communication channel location is disclosed. A first subset of a plurality of channel impulse responses is averaged over a first time period to produce a first filtered channel impulse response, and a second subset of the plurality of channel impulse responses is averaged over a second time period to produce a second filtered channel impulse response. The second time period is different from the first time period, and the second subset is different from the first subset. The communication channel location is determined using the first filtered channel impulse response and the second filtered channel impulse response.

摘要翻译： 公开了一种用于确定通信信道位置的方法。 多个信道脉冲响应的第一子集在第一时间段内被平均以产生第一经滤波的信道脉冲响应，并且在第二时间周期上平均多个信道脉冲响应的第二子集，以产生第二滤波信道 脉冲响应。 第二时间段与第一时间段不同，第二子集与第一子集不同。 使用第一滤波信道脉冲响应和第二滤波信道脉冲响应来确定通信信道位置。

公开(公告)号：US08094623B2

公开(公告)日：2012-01-10

申请号：US11686772

申请日：2007-03-15

申请人： Rashid Ahmed Akbar Attar ,  Rajiv Vijayan ,  Roberto Padovani ,  Naga Bhushan ,  Qiang Wu ,  Peter John Black ,  Eduardo A. S. Esteves

发明人： Rashid Ahmed Akbar Attar ,  Rajiv Vijayan ,  Roberto Padovani ,  Naga Bhushan ,  Qiang Wu ,  Peter John Black ,  Eduardo A. S. Esteves

IPC分类号： H04W36/08

CPC分类号： H04W48/20 ,  H04L1/20 ,  H04W52/24 ,  H04W52/26

摘要： Methods and apparatus for selecting a serving sector in a high rate data (HDR) communication system are disclosed. An exemplary HDR communication system defines a set of data rates, at which a sector of an Access Point may send data packets to an Access Terminal. The sector is selected by the Access Terminal to achieve the highest data throughput while maintaining a targeted packet error rate. The Access Terminal employs various methods to evaluate quality metrics of forward and reverse links from and to different sectors, and uses the quality metrics to select the sector to send data packets to the Access Terminal.

摘要翻译： 公开了在高速率数据（HDR）通信系统中选择服务扇区的方法和装置。 示例性HDR通信系统定义了一组数据速率，在该组数据速率下，接入点的扇区可以向接入终端发送数据分组。 访问终端选择该扇区以实现最高的数据吞吐量，同时保持目标分组错误率。 接入终端采用各种方法来评估来自不同扇区的前向和反向链路的质量度量，并使用质量度量来选择扇区将数据分组发送到接入终端。

公开(公告)号：US20110302605A1

公开(公告)日：2011-12-08

申请号：US13210230

申请日：2011-08-15

申请人： Murali Ramaswamy ,  Gordon Kent Walker ,  Rajiv Vijayan

发明人： Murali Ramaswamy ,  Gordon Kent Walker ,  Rajiv Vijayan

IPC分类号： H04N5/445 ,  H04N7/26

CPC分类号： H04N5/4401 ,  H04N5/50 ,  H04N21/41407 ,  H04N21/4345 ,  H04N21/4384 ,  H04N21/44222

摘要： Techniques to seamlessly switch reception between multimedia programs are described. For “continued decoding”, a wireless device continues to receive, decode, decompress, and (optionally) display a current program until overhead information needed to decode the new program is received. For “early decoding”, the wireless device receives a user input and identifies a program with potential for user selection. The wireless device initiates decoding of the identified program, prior to its selection, so that the program can be decompressed and displayed earlier if it is subsequently selected. For time-compensated transmission, a base station transmits video and audio for a program in a manner to account for the difference between audio processing delay and video processing delay at the wireless device. This allows the wireless device to present the audio earlier during a program change, since its processing delay is shorter, and thus provide a faster response to the program change.

摘要翻译： 描述了在多媒体节目之间无缝切换接收的技术。 对于“继续解码”，无线设备继续接收，解码，解压缩和（可选地）显示当前程序，直到接收到解码新程序所需的开销信息。 对于“早期解码”，无线设备接收用户输入并识别具有用户选择潜力的节目。 无线设备在其选择之前启动所识别的节目的解码，使得如果随后选择该节目，则可以更早地解压缩并显示节目。 对于时间补偿传输，基站以对于无线设备处的音频处理延迟和视频处理延迟之间的差异的方式发送用于节目的视频和音频。 这允许无线设备在程序改变期间更早地呈现音频，因为其处理延迟较短，并且因此对程序改变提供更快的响应。

公开(公告)号：US07907593B2

公开(公告)日：2011-03-15

申请号：US12254680

申请日：2008-10-20

申请人： Rajiv Vijayan ,  Ashok Mantravadi ,  Krishna Kiran Mukkavilli

发明人： Rajiv Vijayan ,  Ashok Mantravadi ,  Krishna Kiran Mukkavilli

IPC分类号： H04J3/06

CPC分类号： H04L25/022 ,  H04L5/0048 ,  H04L23/02 ,  H04L25/0212 ,  H04L25/0228 ,  H04L27/2662 ,  H04L27/2695

摘要： To allow a receiving entity to derive a longer channel estimate while limiting overhead, a transmitting entity transmits a pilot on different groups of subbands in different time intervals. N subbands in the system are arranged into M non-overlapping groups. Each group includes P=N/M subbands that are uniformly distributed across the N subbands. The transmitting entity transmits the pilot on a different subband group in each time interval, and selects all M subband groups in M time intervals based on a pilot staggering pattern. The receiving entity derives (1) an initial impulse response estimate with P channel taps based on the pilot received on one subband group and (2) two longer impulse response estimates with different lengths used for data detection and time tracking. Each longer impulse response estimate may be derived by filtering initial impulse response estimates for a sufficient number of subband groups using a time-domain filter.

摘要翻译： 为了允许接收实体在限制开销的同时导出更长的信道估计，发送实体以不同的时间间隔在不同的子带组上发送导频。 系统中的N个子带被布置成M个非重叠组。 每组包括均匀分布在N个子带上的P = N / M个子带。 发送实体在每个时间间隔中在不同子带组上发送导频，并且基于导频交错模式以M个时间间隔选择所有M个子带组。 接收实体基于在一个子带组上接收到的导频导出（1）具有P信道抽头的初始脉冲响应估计，以及（2）用于数据检测和时间跟踪的两个具有不同长度的较长脉冲响应估计。 可以通过使用时域滤波器对足够数量的子带组的初始脉冲响应估计进行滤波来导出更长的脉冲响应估计。

公开(公告)号：US20100220816A1

公开(公告)日：2010-09-02

申请号：US12777540

申请日：2010-05-11

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

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

IPC分类号： H04L27/00

CPC分类号： H04L27/3488 ,  H04W52/0245 ,  Y02D70/00

摘要： 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.

摘要翻译： 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。