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    Method and apparatus for determining one or more channel compensation parameters based on data eye monitoring
    34.
    发明授权
    Method and apparatus for determining one or more channel compensation parameters based on data eye monitoring 有权
    用于基于数据眼睛监测来确定一个或多个信道补偿参数的方法和装置

    公开(公告)号：US08861580B2

    公开(公告)日：2014-10-14

    申请号：US11434687

    申请日：2006-05-16

    申请人： Christopher J. Abel ,  Mohammad S. Mobin ,  Gregory W. Sheets ,  Lane A. Smith

    发明人： Christopher J. Abel ,  Mohammad S. Mobin ,  Gregory W. Sheets ,  Lane A. Smith

    IPC分类号： H03H7/30 ,  H04L25/03 ,  H04L1/20

    CPC分类号： H04L25/03343 ,  H04L1/205 ,  H04L2025/03681 ,  H04L2025/03802

    摘要： Methods and apparatus are provided for determining one or more channel compensation parameters based on data eye monitoring. According to one aspect of the invention, a method is provided for evaluating the quality of a data eye associated with a signal. The received signal is sampled for a plurality of different phases, for example, using at least two latches, and the samples are evaluated to identify when the signal crosses a predefined amplitude value, such as a zero crossing. It is determined whether the points of predefined amplitude crossing satisfy one or more predefined criteria. One or more parameters of one or more channel compensation techniques can optionally be adjusted based on a result of the determining step. One or more parameters of an adjacent transmitter can also be adjusted to reduce near end cross talk based on a result of the determining step.

    摘要翻译： 提供了用于基于数据眼睛监测来确定一个或多个信道补偿参数的方法和装置。 根据本发明的一个方面，提供了一种用于评估与信号相关联的数据眼的质量的方法。 对于多个不同的相位，例如使用至少两个锁存器对接收到的信号进行采样，并且评估采样以识别信号何时跨越预定义的幅度值，例如零交叉。 确定预定义的幅度交叉点是否满足一个或多个预定标准。 一个或多个信道补偿技术的一个或多个参数可以根据确定步骤的结果来任意地进行调整。 也可以根据确定步骤的结果，调整相邻发射机的一个或多个参数以减少近端串扰。

    APPARATUS AND METHOD FOR ALLOCATING CHANNEL STATE INFORMATION-REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM
    36.
    发明申请
    APPARATUS AND METHOD FOR ALLOCATING CHANNEL STATE INFORMATION-REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM 有权
    用于在无线通信系统中分配信道状态信息参考信号的装置和方法

    公开(公告)号：US20140286304A1

    公开(公告)日：2014-09-25

    申请号：US14299679

    申请日：2014-06-09

    申请人： PANTECH CO., LTD.

    发明人： Sungjun Yoon ,  Kyoung-min Park ,  Kitae Kim

    IPC分类号： H04L5/00

    CPC分类号： H04L5/0048 ,  H04B7/0413 ,  H04B7/0626 ,  H04L5/0007 ,  H04L5/0026 ,  H04L5/0039 ,  H04L5/005 ,  H04L5/0057 ,  H04L5/0073 ,  H04L5/0082 ,  H04L5/14 ,  H04L5/1469 ,  H04L25/0226 ,  H04L27/2607 ,  H04L2025/03426 ,  H04L2025/03802

    摘要： Embodiments of the present invention relate to a wireless communication system, and more particularly, to a technology for allocating a Channel State Information-Reference Signal (CSI-RS) in a wireless communication system. Embodiments of the present invention provides an apparatus and method for allocating CSI-RSs to resource areas, in which, under the condition of a subframe in which the CP is an extended CP, and the duplex scheme is TDD, if CSI-RSs for maximum 8 antenna ports are allocated, the CSI-RSs are allocated to the 8th and 9th symbols (symbol No. l=7 and 8), wherein each CSI-RS for every two antenna ports is allocated to the same RE while being discriminated from each other by an orthogonal code and neighbor CSI-RS allocated REs in the frequency axis are spaced by an interval of three REs.

    摘要翻译： 本发明的实施例涉及无线通信系统，更具体地，涉及在无线通信系统中分配信道状态信息参考信号（CSI-RS）的技术。 本发明的实施例提供了一种用于将CSI-RS分配给资源区域的装置和方法，其中在CP是扩展CP的子帧的条件下，并且双工方案是TDD，如果CSI-RS最大 分配8个天线端口，将CSI-RS分配给第8和第9个符号（符号编号1 = 7和8），其中每两个天线端口的每个CSI-RS被分配给相同的RE，同时从每个 另外由频率轴上的正交码和相邻CSI-RS分配的RE间隔三个RE的间隔。

    Reduced complexity beam-steered MIMO OFDM system
    37.
    发明授权
    Reduced complexity beam-steered MIMO OFDM system 有权
    降低复杂度的波束控制MIMO OFDM系统

    公开(公告)号：US08824583B2

    公开(公告)日：2014-09-02

    申请号：US13793520

    申请日：2013-03-11

    申请人： QUALCOMM Incorporated

    发明人： Steven J. Howard ,  John W. Ketchum ,  Mark S. Wallace ,  Jay Rodney Walton

    IPC分类号： H04L27/28 ,  H04B7/06 ,  H04L25/02 ,  H04B7/04 ,  H04L25/03 ,  H04L5/00

    CPC分类号： H04B7/0421 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/066 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0248 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802

    摘要： Techniques for transmitting data using channel information for a subset of all subcarriers used for data transmission are described. A transmitter station receives channel information for at least one subcarrier that is a subset of multiple subcarriers used for data transmission. The channel information may include at least one transmit steering matrix, at least one set of eigenvectors, at least one channel response matrix, at least one channel covariance matrix, an unsteered pilot, or a steered pilot for the at least one subcarrier. The transmitter station obtains at least one transmit steering matrix for the at least one subcarrier from the channel information and determines a transmit steering matrix for each of the multiple subcarriers. The transmitter station performs transmit steering or beam-steering for each of the multiple subcarriers with the transmit steering matrix for that subcarrier.

    摘要翻译： 描述了使用用于数据传输的所有子载波的子集的信道信息来发送数据的技术。 发射机站接收作为用于数据传输的多个子载波的子集的至少一个子载波的信道信息。 信道信息可以包括至少一个发射导向矩阵，至少一组特征向量，至少一个信道响应矩阵，至少一个信道协方差矩阵，非导向导频或用于所述至少一个子载波的导频导频。 发射机站从信道信息中获取至少一个子载波的至少一个发射导向矩阵，并确定多个子载波中的每一个的发射导向矩阵。 发射台使用该子载波的发射导向矩阵对多个子载波中的每一个进行发射导向或波束导向。

    Feedback and rate adaptation for MIMO transmission in a time division duplexed (TDD) communication system
    38.
    发明授权
    Feedback and rate adaptation for MIMO transmission in a time division duplexed (TDD) communication system 有权
    用于时分双工（TDD）通信系统中的MIMO传输的反馈和速率适配

    公开(公告)号：US08798183B2

    公开(公告)日：2014-08-05

    申请号：US12181732

    申请日：2008-07-29

    申请人： Hao Xu ,  Durga Prasad Malladi

    发明人： Hao Xu ,  Durga Prasad Malladi

    IPC分类号： H04B7/02

    CPC分类号： H04L25/03343 ,  H04B7/0617 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/10 ,  H04L1/0001 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L5/0023 ,  H04L5/0051 ,  H04L5/0053 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0248 ,  H04L25/0398 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/261 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802

    摘要： Techniques for sending a MIMO transmission in a wireless communication system are described. In one design, a transmitter sends a first reference signal to a receiver. The receiver selects a precoding matrix based on the first reference signal and in accordance with a selection criterion. The receiver estimates noise and interference at the receiver and determines channel quality indicator (CQI) or modulation and coding scheme (MCS) information based on the precoding matrix and the estimated noise and interference. The receiver sends the CQI or MCS information and a second reference signal to the transmitter. The transmitter selects the precoding matrix based on the second reference signal and in accordance with the same selection criterion used by the receiver. The transmitter then sends a MIMO transmission to the receiver based on the CQI or MCS information obtained from the receiver and the precoding matrix selected by the transmitter.

    摘要翻译： 描述了在无线通信系统中发送MIMO传输的技术。 在一种设计中，发射机向接收机发送第一参考信号。 接收机根据第一参考信号并根据选择标准选择预编码矩阵。 接收机估计接收机的噪声和干扰，并且基于预编码矩阵和估计的噪声和干扰来确定信道质量指示符（CQI）或调制和编码方案（MCS）信息。 接收机向发射机发送CQI或MCS信息和第二参考信号。 发射机根据第二参考信号并根据接收机使用的相同选择标准来选择预编码矩阵。 然后，发射机基于从接收机获得的CQI或MCS信息和由发射机选择的预编码矩阵向接收机发送MIMO传输。

    METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN MULTI-ANTENNA SYSTEM
    39.
    发明申请
    METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN MULTI-ANTENNA SYSTEM 有权
    用于在多天线系统中发射参考信号的方法和装置

    公开(公告)号：US20140205035A1

    公开(公告)日：2014-07-24

    申请号：US14165162

    申请日：2014-01-27

    申请人： LG ELECTRONICS INC.

    发明人： Hyun Soo KO ,  Seung Hee HAN ,  Ja Ho KOO ,  Jae Hoon CHUNG ,  Bin Chul IHM ,  Moon Il LEE

    IPC分类号： H04B7/04

    CPC分类号： H04B7/0413 ,  H04B7/0613 ,  H04B7/0632 ,  H04L5/0007 ,  H04L5/0026 ,  H04L5/0039 ,  H04L5/0048 ,  H04L5/0057 ,  H04L5/0073 ,  H04L5/0085 ,  H04L25/0226 ,  H04L27/2611 ,  H04L2025/03426 ,  H04L2025/03802

    摘要： A method for transmitting a reference signal in a multi-antenna system is provided. The method includes: selecting at least one orthogonal frequency division multiplexing (OFDM) symbol in a subframe containing a plurality of OFDM symbols; allocating a channel quality indication reference signal (CQI RS) capable of measuring a channel state for each of a plurality of antennas to the selected at least one OFDM symbol; and transmitting the CQI RS, wherein the CQI RS is allocated to an OFDM symbol which does not overlap with an OFDM symbol to which a common reference signal to be transmitted to all user equipments in a cell or a dedicated reference signal to be transmitted to a specific user equipment in the cell is allocated.

    摘要翻译： 提供了一种用于在多天线系统中发送参考信号的方法。 该方法包括：在包含多个OFDM符号的子帧中选择至少一个正交频分复用（OFDM）符号; 向所选择的至少一个OFDM符号分配能够测量多个天线中的每一个的信道状态的信道质量指示参考信号（CQI RS）; 并发送CQI RS，其中将CQI RS分配给OFDM符号，该OFDM符号不与要发送到小区中的所有用户设备的公共参考信号的OFDM符号或要发送到的一个专用参考信号重叠 分配单元中的特定用户设备。

    Method and system for providing beamforming feedback in wireless communication systems
    40.
    发明授权
    Method and system for providing beamforming feedback in wireless communication systems 有权
    在无线通信系统中提供波束成形反馈的方法和系统

    公开(公告)号：US08787841B2

    公开(公告)日：2014-07-22

    申请号：US11768329

    申请日：2007-06-26

    申请人： John W. Ketchum ,  Sanjiv Nanda ,  Arnaud Meylan ,  Shravan K. Surineni

    发明人： John W. Ketchum ,  Sanjiv Nanda ,  Arnaud Meylan ,  Shravan K. Surineni

    IPC分类号： H04B1/00 ,  H04B7/06 ,  H04L25/03 ,  H04L25/02 ,  H04B7/04

    CPC分类号： H04B7/0643 ,  H04B7/0421 ,  H04B7/0617 ,  H04B7/0634 ,  H04B7/0636 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802

    摘要： Techniques to support beamforming for stations in a wireless network are described. In one aspect, a station may support beamforming with implicit feedback or explicit feedback by having capabilities to transmit and receive sounding frames, respond to training request by sending a sounding frame, and respond to request for explicit feedback. In one design of explicit beamforming, the station may send a first frame with a request for explicit feedback and may also send a Null Data Packet (NDP) having at least one training field but no data field. The station may receive a second frame with the explicit feedback, which may be derived based on the NDP. The station may derive steering information (e.g., steering matrices) based on the explicit feedback and may then send a steered frame with beamforming based on the steering information. The station may also perform implicit beamforming using NDP for sounding.

    摘要翻译： 描述了支持无线网络中的站的波束成形的技术。 在一个方面，站可以通过具有发送和接收探测帧的能力来支持具有隐式反馈或显式反馈的波束成形，通过发送探测帧来响应训练请求，以及响应对显式反馈的请求。 在显式波束形成的一种设计中，站可以发送具有对显式反馈的请求的第一帧，并且还可以发送具有至少一个训练场但不包括数据场的空数据分组（NDP）。 该站可以接收具有显式反馈的第二帧，其可以基于NDP导出。 基站可以基于显式反馈导出转向信息（例如，导引矩阵），然后可以基于转向信息发送具有波束成形的转向帧。 该站还可以使用NDP进行声音执行隐式波束成形。