公开(公告)号：US20100040179A1

公开(公告)日：2010-02-18

申请号：US12191427

申请日：2008-08-14

申请人： Taesang Yoo ,  Yongbin Wei ,  Peter Gaal

发明人： Taesang Yoo ,  Yongbin Wei ,  Peter Gaal

IPC分类号： H04B1/10

CPC分类号： H04L25/0204 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03522

摘要： Aspects describe channel estimation in an OFDM system. Baseline DFT-based channel estimation can be performed and scaling can be applied to mitigate distortion in the DFT-based estimations. In some aspects, baseline DFT-based channel estimation can be performed and tones for which DFT-based estimate is deemed unreliable can have MMSE based processing applied locally. If orthogonal sequence is deemed excessive, orthogonal sequence cancellation can be applied prior to the MMSE based processing.

摘要翻译： 方面描述OFDM系统中的信道估计。 可以执行基于基于DFT的信道估计，并且可以应用缩放来减轻基于DFT的估计中的失真。 在一些方面，可以执行基于基于DFT的信道估计，并且基于DFT的估计被认为不可靠的音调可以在本地应用基于MMSE的处理。 如果认为正交序列过大，则可以在基于MMSE的处理之前应用正交序列消除。

公开(公告)号：US10389479B2

公开(公告)日：2019-08-20

申请号：US13016837

申请日：2011-01-28

申请人： Taesang Yoo ,  Siddhartha Mallik ,  Tao Luo

发明人： Taesang Yoo ,  Siddhartha Mallik ,  Tao Luo

IPC分类号： H04W4/00 ,  H04W72/04 ,  H04L1/00 ,  H04L1/18

摘要： Certain aspects of the present disclosure provide for signaling to expanded capability UEs that may limit the interruption of legacy UEs. According to certain aspects, a base station (e.g., an eNB) may generate and transmit one or more signals containing information that is recognizable by at least one expanded capability UE and identified as invalid by at least one legacy UE. An expanded capability UE may receive such signaling and identifying supplemental information in the signaling, while a legacy UE may regard the signaling as invalid.

公开(公告)号：US09503285B2

公开(公告)日：2016-11-22

申请号：US13195711

申请日：2011-08-01

申请人： Taesang Yoo ,  Tao Luo

发明人： Taesang Yoo ,  Tao Luo

IPC分类号： H04W52/02 ,  H04L25/02 ,  H04J11/00

CPC分类号： H04L25/0204 ,  H04J11/005 ,  H04L25/0224 ,  H04W52/02 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146

摘要： Various aspects disclosed are directed to improvements to channel estimation through more efficient cancelation of neighboring common reference signals (CRS). Cancelation of CRS from other cells allows the user equipment (UE) a better opportunity for accurately detecting the reference signal of the current cell. Alternative aspects have a recursive element that uses previous estimates as the basis for the current channel estimate. The various aspects of the present disclosure generally have two alternative embodiments: (1) initializing the channel estimation for all cells with a previous channel estimate and cancellation of reference signals of non-target cells to accurately update channel estimate of the target cell; and (2) initializing the channel estimate for all cells with a previous channel estimate and cancelation of reference signals of all cells to accurately estimate residual channel estimate of the target cell and update its channel estimate.

摘要翻译： 所公开的各个方面旨在通过更有效地消除相邻公共参考信号（CRS）来改进信道估计。 从其他小区中取消CRS允许用户设备（UE）更准确地检测当前小区的参考信号。 替代方面具有使用先前估计作为当前信道估计的基础的递归因子。 本公开的各个方面通常具有两个替代实施例：（1）利用先前的信道估计和非目标小区的参考信号的消除来初始化所有小区的信道估计，以准确地更新目标小区的信道估计; 和（2）利用先前的信道估计和所有小区的参考信号的消除来初始化所有小区的信道估计，以精确估计目标小区的剩余信道估计并更新其信道估计。

公开(公告)号：US09178640B2

公开(公告)日：2015-11-03

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： H04W56/00 ,  H04J11/00 ,  H04B1/707 ,  H04L5/00 ,  H04W28/04 ,  H04W48/16 ,  H04W88/02

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：US09144037B2

公开(公告)日：2015-09-22

申请号：US12853168

申请日：2010-08-09

申请人： Kibeom Seong ,  Tao Luo ,  Taesang Yoo ,  Xiaoxia Zhang ,  Dung Ngoc Doan

发明人： Kibeom Seong ,  Tao Luo ,  Taesang Yoo ,  Xiaoxia Zhang ,  Dung Ngoc Doan

IPC分类号： H04B7/00 ,  H04W52/32 ,  H04L1/00 ,  H04W52/24 ,  H04W72/08 ,  H04W84/04

CPC分类号： H04W52/322 ,  H04L1/0045 ,  H04L1/0069 ,  H04L1/0072 ,  H04W52/244 ,  H04W72/082 ,  H04W84/045

摘要： Systems and methodologies are described that facilitate controlling interference in a heterogeneous wireless communication environment. A Physical Broadcast Channel (PBCH) transmission from an interfering base station can be punctured based upon a puncturing pattern as a function of a cell identifier (ID) and a transmit time. Puncturing can be effectuated by applying power control. Thus, a punctured symbol or subframe can have a reduced transmit power or a transmit power set to zero. Further, the puncturing pattern can be defined on a subframe basis or on a symbol basis.

摘要翻译： 描述了便于控制异构无线通信环境中的干扰的系统和方法。 可以基于作为小区标识符（ID）和发送时间的函数的删截模式来对来自干扰基站的物理广播信道（PBCH）传输进行删截。 通过施加电源控制可以实现穿刺。 因此，打孔的符号或子帧可以具有降低的发射功率或设置为零的发射功率。 此外，可以基于子帧或基于符号来定义删截图案。

公开(公告)号：US09136953B2

公开(公告)日：2015-09-15

申请号：US13196711

申请日：2011-08-02

申请人： Taesang Yoo ,  Tao Luo ,  Yongbin Wei ,  Siddhartha Mallik

发明人： Taesang Yoo ,  Tao Luo ,  Yongbin Wei ,  Siddhartha Mallik

IPC分类号： H04B17/345

CPC分类号： H04B17/345

摘要： Interference on pilot signals and on data tones can be mismatched. Different types of interference estimates perform differently based on how the mismatch occurs. The resulting interference estimate may thus be inaccurate. Interference estimates based on pilot signals and also on data tones can both be evaluated for reliability. The more reliable of the two can then be selected. If the data tones estimate is selected, the estimate can be calculated from covariance matrices or from traffic-to-pilot ratios.

摘要翻译： 对导频信号和数据音调的干扰可能不匹配。 基于不匹配的发生情况，不同类型的干扰估计可以不同地执行。 所得到的干扰估计可能是不准确的。 可以对可靠性进行评估，基于导频信号和数据音调的干扰估计。 然后可以选择更可靠的两个。 如果选择数据音调估计，则可以从协方差矩阵或从业务到导频比来计算估计。

公开(公告)号：US08817924B2

公开(公告)日：2014-08-26

申请号：US13237469

申请日：2011-09-20

申请人： Siddhartha Mallik ,  Taesang Yoo ,  Tao Luo

发明人： Siddhartha Mallik ,  Taesang Yoo ,  Tao Luo

IPC分类号： H03D1/04 ,  H04B7/00

CPC分类号： H04L25/0224

摘要： Channel estimation is performed in a wireless network through cell/antenna pair ranking and iterative soft cancellation of pilot signals. Cell classification and ordering may be ranked and grouped for purposes of improving performance by dedicating hardware resources to higher priority received signals. A metric may be computed to rank the pairs. One such metric is reference signal (RS) power. Pairs may also be grouped into groups of pairs. Groups may be ordered by time-frequency resource and designated as serving-cell groups or non-serving cell groups. Higher priority pairs may be assigned a higher number of iterations. Higher priority groups may be processed first. Pairs which fall below a certain power threshold may be assigned no iterations. Iterations are distributed among hardware blocks to improve processing efficiency. Iteration numbers and hardware assignments may be modified to reach a desired complexity constraint.

摘要翻译： 通过小区/天线对排序和导频信号的迭代软消除在无线网络中执行信道估计。 为了通过将硬件资源专用于较高优先级的接收信号来提高性能，可以对信元分类和排序进行排序和分组。 可以计算度量来对对进行排序。 一个这样的度量是参考信号（RS）功率。 对也可以分组成对。 组可以按时间频率资源排序并指定为服务小区组或非服务小区组。 较高优先级对可以分配更多的迭代次数。 优先级较高的组可以先处理。 低于一定功率阈值的对可以不被分配。 迭代分布在硬件块之间，以提高处理效率。 可以修改迭代数和硬件分配以达到期望的复杂度约束。

公开(公告)号：US08515440B2

公开(公告)日：2013-08-20

申请号：US13023432

申请日：2011-02-08

申请人： Aleksandar Damnjanovic ,  Taesang Yoo

发明人： Aleksandar Damnjanovic ,  Taesang Yoo

IPC分类号： H04W72/00

CPC分类号： H04W72/085 ,  H04B7/022 ,  H04B7/0626 ,  H04B17/24 ,  H04L1/0026 ,  H04W52/281 ,  H04W52/40 ,  H04W72/082

摘要： When enabled with common reference signal interference cancellation, a user equipment (UE) may still compute a channel state feedback value with consideration of any canceled interfering neighboring signals. When the neighboring cells are determined to be transmitting data during the time for which the channel state feedback value is being computed, the UE is able to derive the channel state feedback value considering those canceled interfering signals. The UE determines whether each neighboring cell is transmitting during the designated time either by obtaining signals that indicate the transmission schedule of the neighboring cells or by detecting the transmission schedule, such as based on the power class of the neighboring cells. If the UE determines that the neighboring cells are transmitting data during this time period, the UE will compute the channel state feedback value including consideration of the canceled interfering signals.

摘要翻译： 当使用公共参考信号干扰消除时，用户设备（UE）仍可以考虑任何取消的干扰相邻信号来计算信道状态反馈值。 当在正在计算信道状态反馈值的时间内确定相邻小区正在发送数据时，UE能够导出考虑到那些被消除的干扰信号的信道状态反馈值。 UE通过获得指示相邻小区的传输调度的信号或者通过基于相邻小区的功率等级来检测传输调度来确定在指定时间期间每个相邻小区是否正在发射。 如果UE在该时间段期间确定相邻小区正在发送数据，则UE将计算包括考虑被消除的干扰信号的信道状态反馈值。

公开(公告)号：US20130044697A1

公开(公告)日：2013-02-21

申请号：US13364891

申请日：2012-02-02

申请人： Taesang Yoo ,  Hendrik Schoeneich ,  Myriam Rajih ,  Tao Luo ,  Siddhartha Mallik

发明人： Taesang Yoo ,  Hendrik Schoeneich ,  Myriam Rajih ,  Tao Luo ,  Siddhartha Mallik

IPC分类号： H04B15/00 ,  H04W52/04 ,  H04W72/08

CPC分类号： H04W72/082 ,  H04L1/0003 ,  H04L1/0606

摘要： Communications by base stations in wireless communication networks may be coordinated in a manner to improve performance by mobile devices experiencing interference from non-serving base stations. In particular, base station communications may be coordinated to improve the performance of interference cancellation by mobile devices. If a user equipment (UE) experiencing interference is capable of interference cancellation, then the base stations may coordinate to increase interference to that user equipment so as to improve that UE's ability to perform interference cancellation. Base stations may also coordinate to reduce interference for a UE, regardless of the UE's ability to perform interference cancellation. Mobile device performance improvements may also be achieved by coordinating scheduling of resources by the non-serving base stations, by using communication formats compatible with interference cancellation, by spatial coordination.

摘要翻译： 无线通信网络中的基站的通信可以以改善经历来自非服务基站的干扰的移动设备的性能的方式进行协调。 特别地，可以协调基站通信以改善移动设备的干扰消除的性能。 如果遇到干扰的用户设备（UE）能够进行干扰消除，则基站可以进行协调，以增加对该用户设备的干扰，从而提高UE执行干扰消除的能力。 无论UE是否执行干扰消除的能力，基站还可以协调以减少对UE的干扰。 还可以通过使用通过空间协调使用与干扰消除相兼容的通信格式来协调非服务基站的资源调度来实现移动设备性能改进。

公开(公告)号：US20120224499A1

公开(公告)日：2012-09-06

申请号：US13195711

申请日：2011-08-01

申请人： Taesang Yoo ,  Tao Luo

发明人： Taesang Yoo ,  Tao Luo

IPC分类号： H04L25/08 ,  H04W72/02

CPC分类号： H04L25/0204 ,  H04J11/005 ,  H04L25/0224 ,  H04W52/02 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146

摘要： Various aspects disclosed are directed to improvements to channel estimation through more efficient cancelation of neighboring common reference signals (CRS). Cancelation of CRS from other cells allows the user equipment (UE) a better opportunity for accurately detecting the reference signal of the current cell. Alternative aspects have a recursive element that uses previous estimates as the basis for the current channel estimate. The various aspects of the present disclosure generally have two alternative embodiments: (1) initializing the channel estimation for all cells with a previous channel estimate and cancellation of reference signals of non-target cells to accurately update channel estimate of the target cell; and (2) initializing the channel estimate for all cells with a previous channel estimate and cancelation of reference signals of all cells to accurately estimate residual channel estimate of the target cell and update its channel estimate.

摘要翻译： 所公开的各个方面旨在通过更有效地消除相邻公共参考信号（CRS）来改进信道估计。 从其他小区中取消CRS允许用户设备（UE）更准确地检测当前小区的参考信号。 替代方面具有使用先前估计作为当前信道估计的基础的递归因子。 本公开的各个方面通常具有两个替代实施例：（1）利用先前的信道估计和非目标小区的参考信号的消除来初始化所有小区的信道估计，以准确地更新目标小区的信道估计; 和（2）利用先前的信道估计和所有小区的参考信号的消除来初始化所有小区的信道估计，以精确估计目标小区的剩余信道估计并更新其信道估计。