公开(公告)号：US08712401B2

公开(公告)日：2014-04-29

申请号：US13084806

申请日：2011-04-12

申请人： Taesang Yoo ,  Tao Luo ,  Xiliang Luo

发明人： Taesang Yoo ,  Tao Luo ,  Xiliang Luo

IPC分类号： H04W24/00 ,  H04W72/04

CPC分类号： H04W24/08 ,  H04B17/318 ,  H04B17/327 ,  H04B17/382 ,  H04L5/005 ,  H04L5/0094 ,  H04L25/02 ,  H04W24/00 ,  H04W72/04 ,  H04W72/042

摘要： A method for communicating in an advanced long term evolution (LTE-A) network using common reference signal (CRS) resources associated with different interference levels due to resource partitioning is disclosed. Signals are received from an eNodeB indicating a subset of CRS resources for radio link monitoring (RLM) and/or reference signal received power (RSRP) measuring. The subset of CRS resources includes the CRS resources expected to have lower interference from the interfering eNodeBs. RLM and/or RSRP measurements are performed based on the indicated subset.

摘要翻译： 公开了一种使用由于资源划分引起的与不同干扰电平相关联的共同参考信号（CRS）资源在高级长期演进（LTE-A）网络中进行通信的方法。 从指示用于无线电链路监视（RLM）和/或参考信号接收功率（RSRP）测量的CRS资源的子集的eNodeB接收信号。 CRS资源的子集包括预期来自干扰eNodeB的较低干扰的CRS资源。 基于所指示的子集执行RLM和/或RSRP测量。

公开(公告)号：US20120108175A1

公开(公告)日：2012-05-03

申请号：US13280142

申请日：2011-10-24

申请人： Xiliang Luo ,  Teasang Yoo ,  Tao Luo

发明人： Xiliang Luo ,  Teasang Yoo ,  Tao Luo

IPC分类号： H04W24/00 ,  H04B15/00

CPC分类号： H04L27/2691 ,  H04L5/0007 ,  H04L27/2657 ,  H04L27/2662

摘要： A frontend receiver of a user equipment (UE) is configured with multiple transform operations assigned to separate sets of cells. One set of cells includes the serving cell of the UE and at least one additional cell within a first offset range of the serving cell. Another set or sets of cells include additional interferer cells within another offset range of the serving cell. After tracking the common frequency/timing offsets of each set of cells the assigned transform operation for that set transforms the time domain samples into frequency domain symbols. The individual frequency/timing offsets for each cell within the set are then tracked.

摘要翻译： 用户设备（UE）的前端接收器被配置为分配给单独的单元组的多个变换操作。 一组小区包括UE的服务小区和服务小区的第一偏移范围内的至少一个附加小区。 另一组或多组单元包括在服务小区的另一偏移范围内的附加干扰信元。 在跟踪每组单元的公共频率/定时偏移之后，该组的分配变换操作将时域采样转换成频域符号。 然后跟踪集合内的每个单元的各个频率/定时偏移量。

公开(公告)号：US20120044928A1

公开(公告)日：2012-02-23

申请号：US13212829

申请日：2011-08-18

申请人： Kapil Bhattad ,  Tao Luo ,  Taesang Yoo ,  Xiaoxia Zhang ,  Xiliang Luo ,  Ke Liu ,  Durga Prasad Malladi

发明人： Kapil Bhattad ,  Tao Luo ,  Taesang Yoo ,  Xiaoxia Zhang ,  Xiliang Luo ,  Ke Liu ,  Durga Prasad Malladi

IPC分类号： H04J3/06

CPC分类号： H04J11/0083 ,  H04B1/70718 ,  H04L5/0007 ,  H04W28/04 ,  H04W48/16 ,  H04W88/02

摘要： User equipment (UE) associated with synchronous networks operate in a synchronous mode while UEs associated with asynchronous networks operate in an asynchronous mode. When operating in a synchronous mode, a UE can significantly improve performance of synchronization signal detection, data decoding, and tracking loop management by using the interference cancellation (IC) techniques that are not available in an asynchronous mode of operation. Obtaining synchronization indicators and determining the synchronization status of the current network by UE is disclosed. The determination may be based on the synchronization indicator, whether detected through signal detection, signal measurements, signal analysis, or the like.

摘要翻译： 与同步网络相关联的用户设备（UE）以同步模式工作，而与异步网络相关联的UE以异步模式工作。 当在同步模式下工作时，UE可以通过使用在异步操作模式中不可用的干扰消除（IC）技术来显着提高同步信号检测，数据解码和跟踪环路管理的性能。 公开了获取同步指示符并确定UE当前网络的同步状态。 该确定可以基于通过信号检测，信号测量，信号分析等检测的同步指示器。

公开(公告)号：US07864880B2

公开(公告)日：2011-01-04

申请号：US11243454

申请日：2005-10-04

申请人： Georgios B. Giannakis ,  Xiliang Luo

发明人： Georgios B. Giannakis ,  Xiliang Luo

IPC分类号： H04L27/00

CPC分类号： H04L25/03834 ,  H04B1/7183 ,  H04L7/007 ,  H04L7/08 ,  H04L7/10

摘要： Techniques are described that provide inter-symbol interference—(ISI) and multi-user interference—(MUI) resilient blind timing synchronization and low complexity demodulation in wireless communication systems. A nonzero mean symbol is transmitted with a predetermined period in a stream of zero mean symbols during a synchronization phase. Only zero mean symbols are transmitted outside of the synchronization phase. Blind or non-data aided synchronization is performed at the receiver while bypassing channel estimation. The techniques enable timing synchronization via energy detection and low-complexity demodulation by matching the received waveform to a synchronized aggregate template (SAT). The SAT is recovered by averaging samples of the received waveform during the synchronization phase. In this manner, the described techniques may be applied to single or multi-user narrowband, wideband, or ultra-wideband (UWB) wireless communication systems with fixed or ad hoc access, but are particularly advantageous for wideband or UWB multi-user ad hoc access.

摘要翻译： 描述了在无线通信系统中提供符号间干扰（ISI）和多用户干扰（MUI）弹性盲定时同步和低复杂度解调的技术。 在同步阶段期间以零个平均符号的流以预定周期发送非零均值符号。 只有零个平均符号在同步阶段之外传输。 在旁路信道估计的同时，在接收机执行盲目或非数据辅助同步。 这些技术通过将接收到的波形与同步的聚合模板（SAT）进行匹配，通过能量检测和低复杂度解调实现定时同步。 通过在同步阶段平均接收波形的采样来恢复SAT。 以这种方式，所描述的技术可以应用于具有固定或自组织接入的单用户或多用户窄带，宽带或超宽带（UWB）无线通信系统，但是对于宽带或UWB多用户特定 访问。

公开(公告)号：US20060083319A1

公开(公告)日：2006-04-20

申请号：US11243454

申请日：2005-10-04

申请人： Georgios Giannakis ,  Xiliang Luo

发明人： Georgios Giannakis ,  Xiliang Luo

IPC分类号： H04L27/00

CPC分类号： H04L25/03834 ,  H04B1/7183 ,  H04L7/007 ,  H04L7/08 ,  H04L7/10

摘要： Techniques are described that provide inter-symbol interference—(ISI) and multi-user interference—(MUI) resilient blind timing synchronization and low complexity demodulation in wireless communication systems. A nonzero mean symbol is transmitted with a predetermined period in a stream of zero mean symbols during a synchronization phase. Only nonzero mean symbols are transmitted outside of the synchronization phase. Blind or non-data aided synchronization is performed at the receiver while bypassing channel estimation. The techniques enable timing synchronization via energy detection and low-complexity demodulation by matching the received waveform to a synchronized aggregate template (SAT). The SAT is recovered by averaging samples of the received waveform during the synchronization phase. In this manner, the described techniques may be applied to single or multi-user narrowband, wideband, or ultra-wideband (UWB) wireless communication systems with fixed or ad hoc access, but are particularly advantageous for wideband or UWB multi-user ad hoc access.

摘要翻译： 描述了在无线通信系统中提供符号间干扰（ISI）和多用户干扰（MUI）弹性盲定时同步和低复杂度解调的技术。 在同步阶段期间以零个平均符号的流以预定周期发送非零均值符号。 只有非零平均符号在同步阶段之外传输。 在旁路信道估计的同时，在接收机执行盲目或非数据辅助同步。 这些技术通过将接收到的波形与同步的聚合模板（SAT）进行匹配，通过能量检测和低复杂度解调实现定时同步。 通过在同步阶段平均接收波形的采样来恢复SAT。 以这种方式，所描述的技术可以应用于具有固定或自组织接入的单用户或多用户窄带，宽带或超宽带（UWB）无线通信系统，但是对于宽带或UWB多用户特定 访问。

公开(公告)号：US10786573B2

公开(公告)日：2020-09-29

申请号：US14433389

申请日：2013-10-04

申请人： University of Pittsburgh—Of The Commonwealth System of Higher Education ,  Xinyan Cui ,  Xiliang Luo ,  Cassandra Weaver

发明人： Xinyan Cui ,  Xiliang Luo ,  Cassandra Weaver

IPC分类号： A61K47/02 ,  A61K47/34 ,  A61K31/573 ,  A61K38/39 ,  A61K45/06 ,  A61K9/70 ,  A61K9/00 ,  A61K47/52 ,  A61N1/04

摘要： A composition includes a composite material including at least one conducting polymer doped with graphene oxide and at least one agent immobilized at least one of (i) on graphene oxide extending from the surface of the composite material or (ii) within the composite material.

公开(公告)号：US08768359B2

公开(公告)日：2014-07-01

申请号：US13212812

申请日：2011-08-18

申请人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

发明人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

IPC分类号： H04W36/00 ,  H04B7/00

CPC分类号： H04W56/001 ,  H04J11/005 ,  H04J11/0069 ,  H04J11/0093 ,  H04W24/02 ,  H04W72/042

摘要： Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell.

摘要翻译： 描述了用于选择二次同步信号（SSS）检测的样本的方法和装置。 提供了多种替代方案用于高效的小区标识符检测。 在第一替代方案中，从采样间隔之间以不均匀的间隔对从小区接收的信号的多个突发进行采样，以确定用于小区识别的序列。 在第二替代方案中，从较强小区接收到的第一和第二信号的样本被取消，并且用于检测较弱小区的序列是通过减少从不重叠的较弱小区接收的第三信号的样本的影响来确定的 具有较强小区的主同步信号（PSS）或SSS。 在第三替代方案中，用于检测较弱小区的序列通过减少对应于来自较强小区的信号的高发射功率部分的任何采样突发的影响来确定。

公开(公告)号：US08548383B2

公开(公告)日：2013-10-01

申请号：US12548288

申请日：2009-08-26

申请人： Xiliang Luo ,  Rashid Ahmed Akbar Attar ,  Christopher Gerard Lott

发明人： Xiliang Luo ,  Rashid Ahmed Akbar Attar ,  Christopher Gerard Lott

IPC分类号： H04B1/00 ,  H04B15/00

CPC分类号： H04W52/243 ,  H04W52/146 ,  H04W52/241

摘要： Systems and methodologies are described that facilitate adjusting power spectrum density (PSD) for wireless devices according to multiple possible step sizes. A step size for an adjustment can be selected based at least in part on a received overload indicator from one or more access points, a PSD required to achieve a target signal-to-interference-and-noise ratio (SINR) for a wireless device, and a PSD previously assigned to the wireless device. Once the step size is selected, it can be applied to the previous PSD to generate a new PSD for the wireless device, and the wireless device can accordingly adjust PSD to mitigate inter-cell interference with the one or more access points.

摘要翻译： 描述了根据多个可能的步长调整无线设备的功率谱密度（PSD）的系统和方法。 可以至少部分地基于来自一个或多个接入点的接收到的过载指示符来选择用于调整的步长，为无线设备实现目标信号与干扰噪声比（SINR）所需的PSD 以及先前分配给无线设备的PSD。 一旦选择了步长，就可以将其应用于先前的PSD以产生用于无线设备的新的PSD，并且无线设备可相应地调整PSD以减轻与一个或多个接入点的小区间干扰。

公开(公告)号：US20120046056A1

公开(公告)日：2012-02-23

申请号：US13212812

申请日：2011-08-18

申请人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

发明人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

IPC分类号： H04B7/24

CPC分类号： H04W56/001 ,  H04J11/005 ,  H04J11/0069 ,  H04J11/0093 ,  H04W24/02 ,  H04W72/042

摘要： Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell.

摘要翻译： 描述了用于选择二次同步信号（SSS）检测的样本的方法和装置。 提供了多种替代方案用于高效的小区标识符检测。 在第一替代方案中，从采样间隔之间以不均匀的间隔对从小区接收的信号的多个突发进行采样，以确定用于小区识别的序列。 在第二替代方案中，从较强小区接收到的第一和第二信号的样本被取消，并且用于检测较弱小区的序列是通过减少从不重叠的较弱小区接收的第三信号的样本的影响来确定的 具有较强小区的主同步信号（PSS）或SSS。 在第三替代方案中，用于检测较弱小区的序列通过减少对应于来自较强小区的信号的高发射功率部分的任何采样突发的影响来确定。

公开(公告)号：US07738545B2

公开(公告)日：2010-06-15

申请号：US10952713

申请日：2004-09-29

申请人： Georgios B. Giannakis ,  Liuqing Yang ,  Xiliang Luo

发明人： Georgios B. Giannakis ,  Liuqing Yang ,  Xiliang Luo

IPC分类号： H03H7/30 ,  H03H7/38

CPC分类号： H04B1/7172 ,  H04B1/713 ,  H04B1/7174 ,  H04B1/719

摘要： The invention provides an ultra-wideband (UWB) transmitter and various techniques for generating digitally filtered UWB pulses that substantially maximize power and bandwidth in one or more frequency bands while allowing narrow-band interference (NBI) to be avoided, e.g. interference to and from wireless local area networks (WLANs). In particular, the UWB transmitter utilizes a digital filter to generate digitally filtered UWB pulses to substantially maximize power and bandwidth in the Federal Communications Commission (FCC) spectral mask for UWB communications. In one embodiment, the invention provides a method comprising generating digitally filtered ultra-wide band (UWB) pulses to substantially maximize power in one or more frequency bands of a UWB spectrum and to substantially reduce power in one or more NBI frequency bands of the UWB spectrum. The invention may be implemented without modifying the analog components of existing UWB transmitters.

摘要翻译： 本发明提供了一种超宽带（UWB）发射机和用于产生数字滤波的UWB脉冲的各种技术，其基本上使一个或多个频带中的功率和带宽最大化地最大化，同时允许避免窄带干扰（NBI）。 无线局域网（WLAN）的干扰。 特别地，UWB发射机利用数字滤波器来生成数字滤波的UWB脉冲，以在联邦通信委员会（FCC）频谱掩模中大幅度地最大化功率和带宽用于UWB通信。 在一个实施例中，本发明提供了一种方法，包括生成经数字滤波的超宽带（UWB）脉冲以使UWB频谱的一个或多个频带中的功率基本上最大化，并且在UWB的一个或多个NBI频带中基本上降低功率 光谱。 可以在不修改现有UWB发射机的模拟部件的情况下实现本发明。