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。

公开(公告)号：US07852909B2

公开(公告)日：2010-12-14

申请号：US12004570

申请日：2007-12-21

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： H04B1/38

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台（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。

公开(公告)号：US20080273621A1

公开(公告)日：2008-11-06

申请号：US12004570

申请日：2007-12-21

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

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

IPC分类号： H04B7/02

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。

公开(公告)号：US08295775B2

公开(公告)日：2012-10-23

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： 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。

公开(公告)号：US20130072191A1

公开(公告)日：2013-03-21

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： H04W36/30 ,  H04W24/08

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的功率的信号功率 从基站。

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。

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。

公开(公告)号：US08718159B2

公开(公告)日：2014-05-06

申请号：US13436369

申请日：2012-03-30

申请人： C Ashok Kumar Reddy ,  Anupama Lakshmanan

发明人： C Ashok Kumar Reddy ,  Anupama Lakshmanan

IPC分类号： H04K1/10

CPC分类号： H04L25/0224 ,  H04L5/00 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2666 ,  H04L2025/03414 ,  H04L2025/03783 ,  Y02D70/126

摘要： A user equipment (UE) performs a transform domain (DFT) based method to detect the cyclic prefix (CP) length that is being used by a base station for cellular communications. The detected CP length is then used to reduce the amount of time required to complete the synchronization and cell search procedures. In particular, the UE uses the detected CP length information to obtain Cell Identification parameters (NID1, NID2) along with information including a Maximum energy Tap location and a reference signal receive power (RSRP) while completing the synchronization and cell search procedures.

摘要翻译： 用户设备（UE）执行基于变换域（DFT）的方法来检测基站正在用于蜂窝通信的循环前缀（CP）长度。 然后使用检测到的CP长度来减少完成同步和小区搜索过程所需的时间量。 特别地，UE在完成同步和小区搜索过程的同时，使用检测到的CP长度信息来获得小区识别参数（NID1，NID2）以及包括最大能量抽头位置和参考信号接收功率（RSRP）的信息。

公开(公告)号：US20130129006A1

公开(公告)日：2013-05-23

申请号：US13436369

申请日：2012-03-30

申请人： C. Ashok KUMAR REDDY ,  Anupama Lakshmanan

发明人： C. Ashok KUMAR REDDY ,  Anupama Lakshmanan

IPC分类号： H04B1/02 ,  H04B1/06

CPC分类号： H04L25/0224 ,  H04L5/00 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2666 ,  H04L2025/03414 ,  H04L2025/03783 ,  Y02D70/126

摘要： A transmitter including a signal generator to generate an analytic signal in frequency domain, having frequency components that when converted to time domain result in a time domain signal with a preamble that includes a first half of containing non zero information and a second half containing only zero data. A shaper configured to generate a cyclic prefix including only zero data based on the second half of the preamble included in the time domain signal, and to attach the cyclic prefix including only zero data to the time domain signal to output a pilot signal that is to be transmitted via an antenna.

摘要翻译： 一种包括信号发生器的发射器，用于在频域中产生分析信号，具有频率分量，其在转换成时域时产生包含包含非零信息的前半部分的前导码的时域信号，以及仅包含零 数据。 一种整形器，被配置为基于包括在时域信号中的前导码的后半部分生成仅包括零数据的循环前缀，并将仅包括零数据的循环前缀附加到时域信号以输出导频信号 通过天线传输。

公开(公告)号：US20140256625A1

公开(公告)日：2014-09-11

申请号：US14130983

申请日：2012-07-09

申请人： Charlotte Hauser ,  Anupama Lakshmanan

发明人： Charlotte Hauser ,  Anupama Lakshmanan

IPC分类号： C07K7/06

CPC分类号： C07K7/06 ,  A61K38/06 ,  A61K38/07 ,  A61K38/08 ,  C07K5/0806 ,  C07K5/0808 ,  C07K5/0815 ,  C07K5/0819 ,  C07K5/101

摘要： The invention provides ultra-small peptide inhibitors that are capable of preventing amyloid formation/amyloidosis.

摘要翻译： 本发明提供能够预防淀粉样蛋白形成/淀粉样变性的超小肽抑制剂。