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31. 发明授权

US08718194B2 Method and system for efficient channel estimation 有权
标题翻译：高效信道估计的方法和系统
公开(公告)号：US08718194B2
公开(公告)日：2014-05-06
申请号：US12955802
申请日：2010-11-29
申请人： Dung Ngoc Doan , Tao Luo , Taesang Yoo , Yongbin Wei , Xiaoxia Zhang
发明人： Dung Ngoc Doan , Tao Luo , Taesang Yoo , Yongbin Wei , Xiaoxia Zhang
IPC分类号： H03K9/00
CPC分类号： H04L25/0232 , H04L5/005 , H04L5/0051 , H04L25/0204 , H04L25/0222 , H04L25/0242 , H04L25/0256
摘要： Aspects of the present disclosure describe an efficient channel estimation algorithm for high-speed processing of dedicated reference signals. The channel estimation algorithm may utilize one or more compressed interpolation matrices. The compressed interpolation matrices may be selected based on the Doppler value and signal to noise ratio (SNR) of the channel.
摘要翻译：本公开的方面描述了用于专用参考信号的高速处理的有效的信道估计算法。信道估计算法可以利用一个或多个压缩插值矩阵。可以基于信道的多普勒值和信噪比（SNR）来选择压缩内插矩阵。

32. 发明申请

US20130114441A1 CHANNEL STATE INFORMATION COMPUTATION FOR ENHANCED INTER-CELL INTERFERENCE COORDINATION 审中-公开
标题翻译：通道状态信息计算，用于增强细胞间干扰协调
公开(公告)号：US20130114441A1
公开(公告)日：2013-05-09
申请号：US13608891
申请日：2012-09-10
申请人： Taesang Yoo , Xiliang Luo , Tao Luo , Yongbin Wei
发明人： Taesang Yoo , Xiliang Luo , Tao Luo , Yongbin Wei
IPC分类号： H04W24/00
CPC分类号： H04L1/0026 , H04B17/345 , H04L5/0073 , H04L25/0206 , H04L25/022
摘要： A delayed channel estimation is a channel state information (CSI) reference subframe having an index (NCSI—ref) belonging to NCSI—ref=N−4−k, where N is the subframe index on which the CSI is to be transmitted on an uplink, and k is the smallest value of k>=0, such that N−4−k belongs to a given configuration set. When k is too large, the selected CSI reference subframe is too outdated to produce accurate CSI. An undelayed channel estimation is a CSI reference subframe having an index (NCSI—ref) belonging to NCSI—ref=N−4. When the CSI reference subframe N−4 does not belong to the given subframe restriction subset, the selected channel estimate may be too noisy to produce accurate CSI. A method for CSI computation for enhanced inter-cell interference coordination (eICIC) selects between a delayed channel estimation and an undelayed channel estimation for computing CSI, for example, based on a signal metric. The CSI is computed with a selected channel estimation.
摘要翻译：延迟信道估计是具有属于NCSI-ref = N-4-k的索引（NCSI-ref）的信道状态信息（CSI）参考子帧，其中N是要在其上发送CSI的子帧索引上行链路，k是k> = 0的最小值，使得N-4-k属于给定的配置集合。当k太大时，所选择的CSI参考子帧太过时，不能产生准确的CSI。未延迟的信道估计是具有属于NCSI-ref = N-4的索引（NCSI-ref）的CSI参考子帧。当CSI参考子帧N-4不属于给定子帧限制子集时，所选择的信道估计可能太嘈杂以产生准确的CSI。用于增强小区间干扰协调（eICIC）的CSI计算的方法例如基于信号度量在延迟信道估计和用于计算CSI的未延迟信道估计之间进行选择。使用所选择的信道估计来计算CSI。

33. 发明申请

US20130114437A1 METHOD AND APPARATUS FOR INTERFERENCE CANCELLATION BY A USER EQUIPMENT USING BLIND DETECTION 审中-公开
标题翻译：用于使用盲点检测的用户设备进行干扰消除的方法和装置
公开(公告)号：US20130114437A1
公开(公告)日：2013-05-09
申请号：US13464905
申请日：2012-05-04
申请人： Taesang Yoo , Hendrik Schoeneich , Tao Luo , Yongbin Wei , Myriam Rajih , Durga Prasad Malladi
发明人： Taesang Yoo , Hendrik Schoeneich , Tao Luo , Yongbin Wei , Myriam Rajih , Durga Prasad Malladi
IPC分类号： H04B15/00 , H04W24/00 , H04W4/00
CPC分类号： H04J11/005 , H04B7/068 , H04B7/0842 , H04J11/004
摘要： In order to cancel any interference due to the second cell signal (e.g., from a non-serving cell) from a signal received at a UE, without receiving additional control information, the UE blindly estimates parameters associated with decoding the second cell signal. This may include determining a metric based on sets of symbols associated with the cell signals in order to determine parameters for the second cell signal, e.g., the transmission mode, modulation format, and/or spatial scheme of the second cell signal. The parameters for the signal may be determined based on a comparison of the metric with a threshold. When a spatial scheme and a modulation format is unknown, the blind estimation may include determining a plurality of constellations of possible transmitted modulated symbols associated with a potential spatial scheme and modulation format combination. Interference cancellation can be performed using the constellations and a corresponding probability weight.
摘要翻译：为了从UE接收到的信号中消除由于第二小区信号（例如来自非服务小区）的任何干扰而不接收附加的控制信息，UE盲目地估计与解码第二小区信号有关的参数。这可以包括基于与小区信号相关联的符号集来确定度量，以便确定第二小区信号的参数，例如第二小区信号的传输模式，调制格式和/或空间方案。可以基于度量与阈值的比较来确定信号的参数。当空间方案和调制格式未知时，盲估计可以包括确定与潜在的空间方案和调制格式组合相关联的可能传输的调制符号的多个星座。干扰消除可以使用星座和相应的概率权重进行。

34. 发明申请

US20100040179A1 CHANNEL ESTIMATION 有权
标题翻译：频道估计
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。

35. 发明授权

US08094760B2 Channel estimation 有权
标题翻译：频道估计
公开(公告)号：US08094760B2
公开(公告)日：2012-01-10
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。

36. 发明授权

US10111111B2 Per-cell timing and/or frequency acquisition and their use on channel estimation in wireless networks 有权
公开(公告)号：US10111111B2
公开(公告)日：2018-10-23
申请号：US12949020
申请日：2010-11-18
申请人： Taesang Yoo , Tao Luo , Xiaoxia Zhang , Ke Liu
发明人： Taesang Yoo , Tao Luo , Xiaoxia Zhang , Ke Liu
IPC分类号： H04W24/00 , H04W56/00
摘要： A method, an apparatus, and a computer program product for wireless communication are provided in which a system timing is estimated, derived from timing of one or more cells, a timing offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the timing offsets. In addition, a method, an apparatus, and a computer program product for wireless communication are provided in which a carrier frequency is estimated, derived from a frequency of one or more cells, a frequency offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the frequency offsets.

37. 发明授权

US09143955B2 Detecting and reporting physical-layer cell identifier collisions in wireless networks 有权
标题翻译：检测和报告无线网络中的物理层小区标识符冲突
公开(公告)号：US09143955B2
公开(公告)日：2015-09-22
申请号：US13101877
申请日：2011-05-05
申请人： Xiaoxia Zhang , Ke Liu , Kapil Bhattad , Taesang Yoo , Tao Luo
发明人： Xiaoxia Zhang , Ke Liu , Kapil Bhattad , Taesang Yoo , Tao Luo
IPC分类号： H04W4/00 , H04W24/02 , H04W48/08 , H04W16/14
CPC分类号： H04W24/02 , H04W16/14 , H04W48/08
摘要： Physical-Layer Cell Identifier (PCID) collisions may occur in a wireless network when two neighboring evolved Node Bs (eNBs) having different Global Cell Identifiers (GCID) select identical PCIDs. Evolved Node Bs may uniquely identify themselves by transmitting on a broadcast channel, such as a Physical Broadcast Channel (PBCH), a pattern of bits corresponding to the eNB's GCID. Individual User Equipments (UEs) may recognize the PCID collision by decoding the PBCH payload to identify different GCID-modulated payloads from two eNBs involved in the PCID collision. Alternatively, UEs may detect PCID collisions in the wireless network by monitoring Primary Synchronization Signals (PSS) and Secondary Synchronization Signals (SSS) on the PBCH for identical signals separated by a relatively large time offset. After detecting a PCID collision, the UEs may attempt by best effort to report the PCID collision, may report to a fallback eNB, or the UEs may use special resources on an uplink channel.
摘要翻译：当具有不同的全局小区标识符（GCID）的两个相邻演进节点B（eNB）选择相同的PCID时，物理层小区标识符（PCID）冲突可能发生在无线网络中。演进节点B可以通过在诸如物理广播信道（PBCH）的广播信道上发送与eNB的GCID相对应的比特模式来唯一地标识自身。个体用户设备（UE）可以通过解码PBCH净荷来识别PCID冲突，从而识别来自涉及PCID冲突的两个eNB的不同GCID调制的有效载荷。或者，UE可以通过监视PBCH上的主同步信号（PSS）和次同步信号（SSS）来检测无线网络中的PCID冲突，用相对较大的时间偏移分开的相同信号。在检测到PCID冲突之后，UE可以尽最大努力报告PCID冲突，可以向后退eNB报告，或者UE可以在上行链路信道上使用特殊资源。

38. 发明授权

US08934326B2 Reference signal detection 有权
标题翻译：参考信号检测
公开(公告)号：US08934326B2
公开(公告)日：2015-01-13
申请号：US13467945
申请日：2012-05-09
申请人： Kapil Bhattad , Yi Huang , Tao Luo , Taesang Yoo
发明人： Kapil Bhattad , Yi Huang , Tao Luo , Taesang Yoo
IPC分类号： H04J1/12 , H04J11/00
CPC分类号： H04J11/005
摘要： Aspects of the disclosure are related to identifying whether an apparatus (e.g., base station, access point, etc.) is transmitting using a CRS based transmission scheme or a UE-RS based transmission scheme. Such detection may be necessary for PDSCH interference cancellation (IC) of a neighboring cell since a UE may not know which transmission scheme is used by the neighboring cell. For instance, the UE may know the transmission scheme of the serving cell, but the UE may not know the transmission scheme of a neighboring non-serving cell. As such, aspects of the disclosure provide for a blind detection algorithm to identify or determine a transmission mode or transmission scheme of a neighboring cell to then apply interference cancellation (IC) to an interfering signal received from the neighboring cell.
摘要翻译：本公开的方面与识别装置（例如，基站，接入点等）是否正在使用基于CRS的传输方案或基于UE-RS的传输方案进行传输有关。这样的检测对于相邻小区的PDSCH干扰消除（IC）可能是必要的，因为UE可能不知道相邻小区使用哪种传输方案。例如，UE可以知道服务小区的传输方案，但是UE可能不知道相邻非服务小区的传输方案。因此，本公开的方面提供盲检测算法来识别或确定相邻小区的传输模式或传输方案，然后将干扰消除（IC）应用于从相邻小区接收的干扰信号。

39. 发明授权

US08768359B2 Sample selection for secondary synchronization signal (SSS) detection 有权
标题翻译：次同步信号（SSS）检测的采样选择
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。

40. 发明授权

US08724563B2 Method and apparatus that facilitates detecting system information blocks in a heterogeneous network 有权
标题翻译：便于检测异构网络中的系统信息块的方法和装置
公开(公告)号：US08724563B2
公开(公告)日：2014-05-13
申请号：US12860747
申请日：2010-08-20
申请人： Taesang Yoo , Tao Luo , Kibeom Seong
发明人： Taesang Yoo , Tao Luo , Kibeom Seong
IPC分类号： H04W4/00
CPC分类号： H04L5/0058 , H04L1/0038 , H04L1/0039 , H04W48/12
摘要： Aspects are disclosed for detecting a system information block (SIB) within a heterogeneous network. In one aspect, a type of scheduling information pertaining to an SIB is selected, and a parameter known to a wireless terminal is associated with the type of scheduling information. The wireless terminal then decodes the SIB by deriving the scheduling information from the known parameters, without having to decode a Physical Downlink Control Channel.
摘要翻译：公开了用于检测异构网络内的系统信息块（SIB）的方面。一方面，选择与SIB有关的调度信息的种类，将无线终端所知的参数与调度信息的种类相关联。无线终端然后通过从已知参数导出调度信息来对SIB进行解码，而不必解码物理下行链路控制信道。

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