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    Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling
    1.
    发明申请
    Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling 失效
    无线通信中的噪声方差估计用于分集组合和对数似然度比例

    公开(公告)号：US20060062322A1

    公开(公告)日：2006-03-23

    申请号：US11047347

    申请日：2005-01-28

    申请人： June Namgoong ,  Hao Xu ,  Peter Black ,  Srikant Jayaraman

    发明人： June Namgoong ,  Hao Xu ,  Peter Black ,  Srikant Jayaraman

    IPC分类号： H04B15/00 ,  H04K1/10 ,  H04L27/28

    CPC分类号： H04L1/20 ,  H04B1/1027 ,  H04L27/2647

    摘要： Noise variance estimation in wireless communications. Noise variance estimation includes receiving a signal including an OFDM symbol having, in-band tones including in-band pilot tones, and band-edge tones including band-edge pilot tones and guard tones, estimating an effective noise variance for the in-band tones using the in-band pilot tones and channel estimates for the in-band pilot tones, and estimating an effective noise variance for the band-edge tones using the band-edge pilot tones, channel estimates for the band-edge pilot tones, and the guard tones.

    摘要翻译： 无线通信中的噪声方差估计。 噪声方差估计包括接收包括具有包括带内导频音频的带内音调和包括带边导频音和保护音的带边音调的OFDM符号的信号，估计带内音调的有效噪声方差 使用带内导频音调和频带内导频音调的估计，以及使用带边导频音估计带边音调的有效噪声方差，对带边导频音进行信道估计，以及 守卫色调。

    CDMA pilot assisted channel estimation
    2.
    发明申请
    CDMA pilot assisted channel estimation 有权
    CDMA导频辅助信道估计

    公开(公告)号：US20050276364A1

    公开(公告)日：2005-12-15

    申请号：US11102301

    申请日：2005-04-08

    申请人： Peter Black ,  Hao Xu ,  June Namgoong ,  Srikant Jayaraman

    发明人： Peter Black ,  Hao Xu ,  June Namgoong ,  Srikant Jayaraman

    IPC分类号： H04L25/02 ,  H04L7/00

    CPC分类号： H04L25/0204 ,  H04L25/0216 ,  H04L25/0234

    摘要： A pilot assisted channel estimation process. A receiver may be configured to estimate the impulse response of a channel from a signal having pilot tones and spread-spectrum pilot signals. The receiver estimates the response of the channel from the pilot tones, and adapts the length of delay the channel response is estimated based on the spread-spectrum pilot signals.

    摘要翻译： 导频辅助信道估计过程。 接收机可以被配置为从具有导频音调和扩频导频信号的信号估计信道的脉冲响应。 接收机从导频音估计信道的响应，并根据扩频导频信号调整估计信道响应的延迟长度。

    Synchronized broadcast/multicast communication
    4.
    发明申请
    Synchronized broadcast/multicast communication 有权
    同步广播/组播通信

    公开(公告)号：US20050175070A1

    公开(公告)日：2005-08-11

    申请号：US11041136

    申请日：2005-01-20

    申请人： Matthew Grob ,  Peter Black ,  Srikant Jayaraman ,  Paul Jacobs

    发明人： Matthew Grob ,  Peter Black ,  Srikant Jayaraman ,  Paul Jacobs

    IPC分类号： H04L5/02 ,  H04L27/26 ,  H04B1/707

    CPC分类号： H04L5/026 ,  H04L27/2607

    摘要： Synchronized broadcast transmits a same broadcast content using a same waveform from multiple transmitters. Transmitters each apply a same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an Orthogonal Frequency Divisional Multiplex (OFDM) waveform for the synchronized broadcast. An OFDM receiver is then used to process the received synchronized broadcast transmission. An alternate embodiment implements a broadcast Pseudo-random Noise (PN) code for use by multiple transmitters. An equalizer is then employed to estimate the synchronized broadcast transmission.

    摘要翻译： 同步广播使用来自多个发射机的相同波形发送相同的广播内容。 发射机各自对广播传输应用相同的扩展码。 在具有时分多路复用前向链路的扩频通信系统中，将同步的广播传输插入广播时隙。 一个实施例采用用于同步广播的正交频分复用（OFDM）波形。 然后使用OFDM接收机来处理所接收的同步广播传输。 替代实施例实现广播伪随机噪声（PN）码，供多个发射机使用。 然后使用均衡器来估计同步的广播传输。

    Method and apparatus for near-optimal scaling of log-likelihood ratio (LLR) computation in turbo decoding for hybrid automatic repeat request (ARQ)
    5.
    发明授权
    Method and apparatus for near-optimal scaling of log-likelihood ratio (LLR) computation in turbo decoding for hybrid automatic repeat request (ARQ) 失效
    用于混合自动重复请求（ARQ）的turbo解码中对数似然比（LLR）计算近似最优缩放的方法和装置

    公开(公告)号：US07376209B2

    公开(公告)日：2008-05-20

    申请号：US10456148

    申请日：2003-06-06

    申请人： June Namgoong ,  Jun Ma ,  Mingxi Fan ,  Naga Bhushan ,  Peter Black

    发明人： June Namgoong ,  Jun Ma ,  Mingxi Fan ,  Naga Bhushan ,  Peter Black

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H03M13/3927 ,  H03M13/2957 ,  H03M13/658 ,  H04L1/0045 ,  H04L1/0066 ,  H04L1/1812 ,  H04L1/1825 ,  Y10S370/912

    摘要： A method and an apparatus for scaling demodulated data symbols contained in a packet to generate scaled log-likelihood ratios for Turbo decoding are disclosed. A packet consists of one or more subpackets depending on the type of packet. Each subpacket is identified by a subpacket identification number. The payload size of the packet and the subpacket identification number may be determined by decoding a reverse rate indicator (RRI) channel. A scale factor which is associated with a specific subpacket identification number and a specific payload size results in a performance measure that is closest to an expected performance measure. The scale factor is used for scaling the demodulated data symbols to generate scaled log-likelihood ratios for Turbo decoding.

    摘要翻译： 公开了一种用于缩放分组中包含的解调数据符号以产生用于Turbo解码的缩放对数似然比的方法和装置。 数据包由一个或多个子数据包组成，具体取决于数据包的类型。 每个子分组由子分组标识号码标识。 可以通过解码反向速率指示符（RRI）信道来确定分组的有效载荷大小和子分组标识号码。 与特定子分组标识号和特定有效载荷大小相关联的比例因子导致最接近预期性能测量的性能度量。 缩放因子用于缩放解调的数据符号以产生用于Turbo解码的缩放的对数似然比。

    Method of determining the location of the FFT window and the delay spread for the platinum broadcast channel estimator
    6.
    发明申请
    Method of determining the location of the FFT window and the delay spread for the platinum broadcast channel estimator 有权
    确定FFT窗口的位置的方法和铂广告信道估计器的延迟扩展

    公开(公告)号：US20060233269A1

    公开(公告)日：2006-10-19

    申请号：US11174108

    申请日：2005-06-29

    申请人： Naga Bhushan ,  June Namgoong ,  Peter Black

    发明人： Naga Bhushan ,  June Namgoong ,  Peter Black

    IPC分类号： H04L27/28 ,  H04K1/10 ,  H04B1/707

    CPC分类号： H04L27/2662 ,  H04L25/022 ,  H04L27/2665

    摘要： In one embodiment, the invention comprises a channel estimation method, comprising determining a FFT window position, and calculating a delay spread. In another embodiment, the step of determining a FE window position comprises setting an initial position of the FFT window, computing an energy for each tap, time averaging said energy for each tap, comparing an average energy of each tap with a first threshold multiplied by the average energy of all taps, comparing the average energy of each tap with a second threshold multiplied by a maximum average energy in alias components, updating the set of paths if the average energy of the tap is greater than said second threshold multiplied by the maximum average energy in alias components; and refining the FFT window position.

    摘要翻译： 在一个实施例中，本发明包括信道估计方法，包括确定FFT窗口位置，并计算延迟扩展。 在另一个实施例中，确定FE窗口位置的步骤包括设置FFT窗口的初始位置，计算每个抽头的能量，对每个抽头的所述能量进行平均的时间，将每个抽头的平均能量与乘以 所有抽头的平均能量，将每个抽头的平均能量与第二阈值乘以别名分量中的最大平均能量，如果抽头的平均能量大于所述第二阈值乘以最大值，则更新该组路径 别名成分中的平均能量; 并精简FFT窗口位置。

    XML document frameworks
    7.
    发明授权
    XML document frameworks 有权
    XML文档框架

    公开(公告)号：US07703003B2

    公开(公告)日：2010-04-20

    申请号：US10256345

    申请日：2002-09-27

    申请人： Geoff Payne ,  Paul Harrison ,  Peter Black ,  Elizabeth E. Bell

    发明人： Geoff Payne ,  Paul Harrison ,  Peter Black ,  Elizabeth E. Bell

    IPC分类号： G06F17/21 ,  G06F17/30

    CPC分类号： G06F17/243

    摘要： An apparatus may be configured to generate document data representing a document for use in providing a service comprising a number of different activities that are to be carried out in providing the service. The apparatus may enable a user to retrieve previously stored document portions in accordance with the activity to which the document portion relates so that it is not necessary for the user to identify a specific document portion, a specific filename or an inventory part number allocated to that document portion. In one embodiment, an apparatus may be configured to generate a document that enables a user to assemble a document in accordance with the activities to which the document relates rather than to the actual content of the document. Thus, the user wishing to assemble a document may be concerned with the activities instead of which precise document portions to include in the document.

    摘要翻译： 设备可以被配置为生成表示文档的文档数据，以用于提供包括在提供服务中要执行的多个不同活动的服务。 该装置可以使得用户可以根据文档部分所关联的活动来检索先前存储的文档部分，使得用户不需要识别分配给该文档部分的特定文档部分，特定文件名或库存部件号 文件部分。 在一个实施例中，设备可以被配置为生成使得用户能够根据文档所关联的活动来组装文档而不是文档的实际内容的文档。 因此，希望组装文档的用户可能关心活动，而不是要包括在文档中哪个精确的文档部分。

    Method and an apparatus for a waveform quality measurement
    8.
    发明授权
    Method and an apparatus for a waveform quality measurement 失效

    公开(公告)号：US07564794B2

    公开(公告)日：2009-07-21

    申请号：US10728648

    申请日：2003-12-05

    申请人： Juan Montojo ,  Nagabhushana Sindhushayana ,  Peter Black

    发明人： Juan Montojo ,  Nagabhushana Sindhushayana ,  Peter Black

    IPC分类号： H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26 ,  H04L12/28

    CPC分类号： H04B17/309 ,  H04B1/707

    摘要： A method and an apparatus for waveform quality measurement are disclosed. An actual signal, representing a waveform channelized both in time and in code is generated by, e.g., an exemplary HDR communication system. Test equipment generates an ideal waveform corresponding to the actual waveform. The test equipment then generates an estimate of offsets between parameters of the actual waveform and the ideal waveform, and the offsets are used to compensate the actual waveform. The test equipment then evaluates various waveform quality measurements utilizing the compensated actual waveform and the corresponding ideal waveform. Definitions of the various waveform quality measurements as well as conceptual and practical examples of processing of the actual waveform and the corresponding ideal waveform by the test equipment are disclosed. The disclosed method and apparatus may be extended to any waveform channelized both in time and in code regardless of the equipment that generated the waveform.

    Method and System for Scheduling Data Transmission in Communication Systems
    9.
    发明申请
    Method and System for Scheduling Data Transmission in Communication Systems 有权
    通信系统中数据传输调度的方法与系统

    公开(公告)号：US20070091841A1

    公开(公告)日：2007-04-26

    申请号：US11559263

    申请日：2006-11-13

    申请人： Naga Bhushan ,  Etienne Chaponniere ,  Peter Black ,  David Tse

    发明人： Naga Bhushan ,  Etienne Chaponniere ,  Peter Black ,  David Tse

    IPC分类号： H04Q7/00

    CPC分类号： H04W72/1231

    摘要： A transmitter directed, distributed receiver using multi-user diversity provided by the distribution of the receiver. Advantage is taken of the uncorrelated variations over time in the condition of communication links between a common transmitter and several users. The greater the variation in the quality of a particular link over time, the greater the increase in total system throughput provided. A scheduler metric (or scheduler metric) represents the instantaneous quality of the communication link between each user and the transmitter with respect to the average quality of the link. Alternatively, the scheduler metric represents the instantaneous channel condition with respect to the average data throughput over that channel. The common transmitting station uses the scheduler metric to directly compare the desirability of granting each channel access with the desirability of granting each other channel access. The users with links that have the greatest scheduler metric are provided access to the channels.

    摘要翻译： 一种使用由接收机分配提供的多用户分集的发射机定向分布式接收机。 在普通发射机和多个用户之间的通信链路的情况下，优先考虑不相关的随时间变化的变化。 随着时间的推移，特定链路的质量变化越大，提供的系统总吞吐量的增加越多。 调度器度量（或调度器度量）表示相对于链路的平均质量的每个用户和发射机之间的通信链路的瞬时质量。 或者，调度器度量表示相对于该信道上的平均数据吞吐量的瞬时信道条件。 公共发送站使用调度器度量来直接比较授予每个信道接入的可取性与允许彼此信道接入的可取性。 拥有最大调度器度量标准的链接的用户可以访问这些通道。