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    Determining a handoff metric
    52.
    发明授权
    Determining a handoff metric 有权
    确定切换度量

    公开(公告)号：US08571484B2

    公开(公告)日：2013-10-29

    申请号：US13620449

    申请日：2012-09-14

    申请人： Louay Jalloul ,  Djordje Tujkovic ,  Anupama Lakshmanan

    发明人： Louay Jalloul ,  Djordje Tujkovic ,  Anupama Lakshmanan

    IPC分类号： H04B17/00

    CPC分类号： H04W36/30 ,  H04B17/26 ,  H04B17/318 ,  H04B17/382 ,  H04W24/08

    摘要： A method and apparatus of determining a hand-off metric are disclosed. One method includes a subscriber receiving identifications of a neighboring set of base stations from a serving base station, determining an active set of base stations by measuring received signal power from each of the base stations of the neighboring set at first discrete points in time, averaging the received signal power for each of these base stations, and selecting the active set based on the average received signal power. Determining the hand-off metric further includes calculating a ratio of average receive signal power to average excess received signal power, for each base station of the active set, wherein the excess received signal power includes signal power received by the subscriber in excess of power received from the base station.

    摘要翻译： 公开了一种确定越区切换度量的方法和装置。 一种方法包括用户从服务基站接收相邻的基站集合的标识，通过在第一离散时间点测量来自相邻集合的每个基站的接收信号功率来确定基站的活动集合，平均 每个这些基站的接收信号功率，以及基于平均接收信号功率选择有效集合。 确定越区切换度量还包括计算有源集合的每个基站的平均接收信号功率与平均多余的接收信号功率的比率，其中多余的接收信号功率包括由用户接收的超过接收功率的信号功率 从基站。

    SELECTING A TRANSMISSION MODE BETWEEN A SUBSCRIBER AND A BASE STATION
    53.
    发明申请
    SELECTING A TRANSMISSION MODE BETWEEN A SUBSCRIBER AND A BASE STATION 有权
    选择用户和基站之间的传输模式

    公开(公告)号：US20130010734A1

    公开(公告)日：2013-01-10

    申请号：US13618895

    申请日：2012-09-14

    申请人： Kameswara Medapalli ,  Djordje Tujkovic ,  Kamlesh Rath ,  Louay Jalloul ,  Bertrand Hochwald

    发明人： Kameswara Medapalli ,  Djordje Tujkovic ,  Kamlesh Rath ,  Louay Jalloul ,  Bertrand Hochwald

    IPC分类号： H04W72/02

    CPC分类号： H04W72/085 ,  H04L1/002 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/0094

    摘要： Embodiments for a method and apparatus of selecting a transmission mode between the subscriber and a base station are disclosed. One method includes determining a predictive window. Instantaneous channel quality measurements are averaged, wherein the averaging is dependent upon a size of the predictive window. A first estimate of the transmission mode is determined based on the averaged instantaneous channel quality measurements. A margin is calculated based on reception of a qualifying downlink transmission. The transmission mode is selected by updating the first estimate with the margin.

    摘要翻译： 公开了在用户和基站之间选择传输模式的方法和装置的实施例。 一种方法包括确定预测窗口。 对瞬时信道质量测量进行平均，其中平均取决于预测窗口的大小。 基于平均的瞬时信道质量测量来确定传输模式的第一估计。 基于合格的下行链路传输的接收来计算余量。 通过用余量更新第一估计来选择传输模式。

    Method and apparatus for estimating frequency offset and timing offset of one or more mobile stations
    54.
    发明授权
    Method and apparatus for estimating frequency offset and timing offset of one or more mobile stations 失效
    用于估计一个或多个移动台的频率偏移和定时偏移的方法和装置

    公开(公告)号：US08139667B2

    公开(公告)日：2012-03-20

    申请号：US12951185

    申请日：2010-11-22

    申请人： Rajesh Raja Manakkal ,  Louay Jalloul ,  Sam P. Alex ,  Anupama Lakshmanan ,  Djordje Tujkovic ,  Sriram Mudulodu

    发明人： Rajesh Raja Manakkal ,  Louay Jalloul ,  Sam P. Alex ,  Anupama Lakshmanan ,  Djordje Tujkovic ,  Sriram Mudulodu

    IPC分类号： H04L27/28

    CPC分类号： H04L27/2662 ,  H04L5/0007 ,  H04L5/0051 ,  H04L27/2657 ,  H04L27/2675

    摘要： A method and apparatus for estimating frequency offset and timing offset of a first Mobile Station (MS) in a communication system is provided. The method includes receiving a composite signal at a plurality of receiver antennas of a Base Transceiver Station (BTS). The composite signal includes a first signal transmitted from a first MS and a second signal transmitted from a second MS. The composite signal includes one or more tiles. Each tile includes a plurality of data sub-carriers, a plurality of first pilot sub-carriers, and a plurality of second pilot sub-carriers. A total phase offset of the first MS is estimated based on a complex conjugate product of pilot symbols of the plurality of first pilot sub-carriers. Thereafter, a first phase offset corresponding to the timing offset of the first MS is estimated based on a Power Delay Profile (PDP) of one or more first pilot sub-carriers. Finally, a second phase offset corresponding to the frequency offset of the first MS is determined based on the total phase offset and the first phase offset.

    摘要翻译： 提供了一种用于估计通信系统中的第一移动站（MS）的频率偏移和定时偏移的方法和装置。 该方法包括在基站收发台（BTS）的多个接收机天线处接收复合信号。 复合信号包括从第一MS发送的第一信号和从第二MS发送的第二信号。 复合信号包括一个或多个瓦片。 每个瓦片包括多个数据副载波，多个第一导频子载波和多个第二导频子载波。 基于多个第一导频子载波的导频符号的复共轭乘积来估计第一MS的总相位偏移。 此后，基于一个或多个第一导频子载波的功率延迟曲线（PDP）来估计与第一MS的定时偏移相对应的第一相位偏移。 最后，基于总相位偏移和第一相位偏移来确定与第一MS的频率偏移相对应的第二相位偏移。

    Measuring noise power at wireless receivers using pilot symbol information
    55.
    发明授权
    Measuring noise power at wireless receivers using pilot symbol information 有权
    使用导频符号信息测量无线接收机的噪声功率

    公开(公告)号：US07835432B2

    公开(公告)日：2010-11-16

    申请号：US11788265

    申请日：2007-04-19

    申请人： Djordje Tujkovic ,  Ying Xia ,  Robert Lorenz ,  Sriram Mudulodu

    发明人： Djordje Tujkovic ,  Ying Xia ,  Robert Lorenz ,  Sriram Mudulodu

    IPC分类号： H04B3/46 ,  H04B17/00 ,  H04Q1/20

    CPC分类号： H04B17/345 ,  H04B17/26 ,  H04B2201/70701 ,  H04L25/0224 ,  H04L2025/03414 ,  H04L2025/03426

    摘要： Embodiments are directed to a wireless receiver system that utilizes a special structure of pilot symbols used for synchronization and channel estimation in transmission packets to measure noise power at the receiver. The periodicity of the pilot signal sequences is used to extract the noise power from the received signal. Such extraction is achieved by subtracting the received signals from two pilot slots which are separated by the known periodicity of the training sequence. This method relies on the fact that desired signal and system interference signals will cancel out after the subtraction process. Measuring the power of the residual signal after subtraction represents the estimate of the noise power. Several consecutive such residual signals can be first summed up before measuring the power to improve the estimate of the noise power at the receiver. To further improve the performance, estimates of the desired signal produced by a channel estimation block can be first subtracted from each of the received signals on two pilot slots which are then to be subtracted and are separated by the known periodicity of the pilot sequence.

    摘要翻译： 实施例涉及一种无线接收机系统，其利用用于传输分组中的同步和信道估计的导频符号的特殊结构来测量接收机处的噪声功率。 导频信号序列的周期性用于从接收信号中提取噪声功率。 通过从由训练序列的已知周期分隔的两个导频时隙中减去接收到的信号来实现这种提取。 该方法依赖于在减法处理之后期望的信号和系统干扰信号将被抵消的事实。 减去后测量残留信号的功率表示噪声功率的估计。 在测量功率之前可以首先总结几个连续的这样的残余信号，以改善接收机噪声功率的估计。 为了进一步提高性能，可以首先从两个导频时隙上的每个接收信号中减去由信道估计块产生的期望信号的估计值，然后被减去并且被导频序列的已知周期分隔。

    Synchronization and Frame Structure Determination of a Base Station
    56.
    发明申请
    Synchronization and Frame Structure Determination of a Base Station 有权
    基站的同步和帧结构确定

    公开(公告)号：US20100215032A1

    公开(公告)日：2010-08-26

    申请号：US12696719

    申请日：2010-01-29

    申请人： Louay Jalloul ,  Djordje Tujkovic

    发明人： Louay Jalloul ,  Djordje Tujkovic

    IPC分类号： H04J3/06 ,  H04L27/28

    CPC分类号： H04L27/2692 ,  H04L27/2646 ,  H04L27/2655 ,  H04W56/0045 ,  H04W92/20

    摘要： A method and apparatus of synchronization and frame structure determination of a base station are disclosed. One method includes the base station determining an initial frame structure including an active region and a dummy region, wherein the regions are sets of OFDM symbols. The base station receives timing information from at least one of a mobile station and a second base station, wherein the mobile station is simultaneously communicating with the base station and the second base station. The base station adjusts its frame structure based at least in part on the timing information, wherein adjusting its frame structure includes at least one of adjusting the active region and the dummy region. The base station adjusts its internal timing to improve synchronization with the second base station based on the timing error information.

    摘要翻译： 公开了基站的同步和帧结构确定的方法和装置。 一种方法包括基站确定包括有源区域和虚拟区域的初始帧结构，其中该区域是OFDM符号集合。 基站从移动台和第二基站中的至少一个接收定时信息，其中移动站同时与基站和第二基站进行通信。 基站至少部分地基于定时信息调整其帧结构，其中调整其帧结构包括调整有源区域和虚拟区域中的至少一个。 基站根据定时误差信息调整其内部定时以改善与第二基站的同步。

    Method and apparatus for link adaptation in wirless communication network
    58.
    发明申请
    Method and apparatus for link adaptation in wirless communication network 有权
    无线通信网络中链路自适应的方法和装置

    公开(公告)号：US20090310550A1

    公开(公告)日：2009-12-17

    申请号：US12456471

    申请日：2009-06-16

    申请人： Kameswara Medapalli ,  Djordje Tujkovic ,  Kamlesh Rath ,  Louay Jalloul ,  Bertrand Hochwald

    发明人： Kameswara Medapalli ,  Djordje Tujkovic ,  Kamlesh Rath ,  Louay Jalloul ,  Bertrand Hochwald

    IPC分类号： H04W72/00

    CPC分类号： H04W28/18 ,  H04W40/12

    摘要： A method and apparatus for link adaptation in a wireless communication network is provided. The method includes computing a first channel quality parameter based on one or more channel quality parameters. The one or more channel quality parameters are associated with a communication link between a Mobile Station (MS) and a Base Station (BS). The method further includes determining a qualifying transmission unit to compute a correction parameter. The correction parameter is computed based on the first channel quality parameter and one or more transmission parameters. The one or more transmission parameter is associated with the communication link. Thereafter, the method schedules a transmission mode of the communication link based on a second channel quality parameter. The second channel quality parameter is estimated based the first channel quality parameter and the correction parameter.

    摘要翻译： 提供了一种用于无线通信网络中的链路自适应的方法和装置。 该方法包括基于一个或多个信道质量参数来计算第一信道质量参数。 一个或多个信道质量参数与移动站（MS）和基站（BS）之间的通信链路相关联。 该方法还包括确定合格传输单元以计算校正参数。 基于第一信道质量参数和一个或多个传输参数来计算校正参数。 一个或多个传输参数与通信链路相关联。 此后，该方法基于第二信道质量参数调度通信链路的传输模式。 基于第一信道质量参数和校正参数来估计第二信道质量参数。

    Determining a handoff metric
    59.
    发明申请
    Determining a handoff metric 有权
    确定切换度量

    公开(公告)号：US20090275335A1

    公开(公告)日：2009-11-05

    申请号：US12150862

    申请日：2008-05-01

    申请人： Louay Jalloul ,  Djordje Tujkovic ,  Anupama Lakshmanan

    发明人： Louay Jalloul ,  Djordje Tujkovic ,  Anupama Lakshmanan

    IPC分类号： H04Q7/22 ,  H04B17/00

    CPC分类号： H04W36/30 ,  H04B17/26 ,  H04B17/318 ,  H04B17/382 ,  H04W24/08

    摘要： A method and apparatus of determining a hand-off metric is disclosed. One method includes a subscriber receiving identifications of a neighboring set of base stations from a serving base station. From the neighboring set, the subscriber determines an active set of base stations. The active set is determined by the subscriber measuring received signal power from each of the base stations of the neighboring set at first discrete points in time, averaging the received signal power for each of the base stations of the neighboring set, and selecting the active set based on the average received signal power of the base stations of the neighboring set. Determining the at least one hand-off metric further includes the subscriber measuring at second discrete points in time an excess received signal power for each base station of the active set, wherein the excess received signal power includes signal power received by the subscriber in excess of power received from the base station. The subscriber averages the excess received signal power. The subscriber calculates the hand-off metric by calculating a ratio of average receive signal power to average excess received signal power, for each base station of the active set.

    摘要翻译： 公开了一种确定越区切换度量的方法和装置。 一种方法包括订户从服务基站接收相邻的一组基站的标识。 用户从相邻集合确定一组活跃的基站。 该用户确定用户在第一离散时间点测量来自相邻集合的每个基站的接收信号功率，对邻近集合中的每个基站的接收信号功率进行平均，并选择活动集合 基于相邻集合的基站的平均接收信号功率。 确定所述至少一个切换度量还包括所述用户在时间上在所述有效集合的每个基站处在第二离散点处测量多余的接收信号功率，其中所述多余的接收信号功率包括由所述用户接收的信号功率超过 从基站接收的功率。 用户对多余的接收信号功率进行平均。 用户通过计算平均接收信号功率与平均超出接收信号功率的比率来计算切换度量，对于活动集合的每个基站。