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    Enabling downlink transparent relay in a wireless communications network
    91.
    发明授权
    Enabling downlink transparent relay in a wireless communications network 有权
    在无线通信网络中启用下行链路透明中继

    公开(公告)号：US08737912B2

    公开(公告)日：2014-05-27

    申请号：US13058708

    申请日：2009-08-12

    申请人： Jianglei Ma ,  Hua Xu ,  Hang Zhang ,  Peiying Zhu ,  Wen Tong

    发明人： Jianglei Ma ,  Hua Xu ,  Hang Zhang ,  Peiying Zhu ,  Wen Tong

    IPC分类号： H04B7/14

    CPC分类号： H04B7/155 ,  H04B7/2606 ,  H04W16/26 ,  H04W84/047

    摘要： Methods and apparatus are described for enabling downlink transparent relay in a wireless communication network. In a wireless communications network, a base station and a mobile station may communicate with each other via a relay station, as needed. Transparent relay may allow for relay communication between a base station and a mobile station although the mobile station is unaware of the relay station. However, non-contiguous transmission of a relay station may lead to channel quality measurement and channel estimation degradation during downlink transparent relay. According to some aspects, a base station may schedule a mobile station to a transmission mode that utilizes dedicated pilot signals for downlink transparent relay, and a relay station may transmit data and dedicated pilot signals over the same channel resources as the base station. According to some aspects, the relay station may null common pilot signals transmitted by the base station.

    摘要翻译： 描述了用于在无线通信网络中启用下行链路透明中继的方法和装置。 在无线通信网络中，基站和移动台可以根据需要经由中继站进行通信。 尽管移动台不知道中继站，但是透明中继可以允许基站和移动台之间的中继通信。 然而，中继站的不连续传输可能导致下行链路透明中继期间的信道质量测量和信道估计恶化。 根据一些方面，基站可以将移动台调度为利用用于下行链路透明中继的专用导频信号的传输模式，并且中继站可以通过与基站相同的信道资源发送数据和专用导频信号。 根据一些方面，中继站可以丢弃由基站发送的公共导频信号。

    Scattered pilot pattern and channel estimation method for MIMO-OFDM systems
    95.
    发明授权
    Scattered pilot pattern and channel estimation method for MIMO-OFDM systems 有权
    MIMO-OFDM系统的分散导频模式和信道估计方法

    公开(公告)号：US08325836B2

    公开(公告)日：2012-12-04

    申请号：US13108443

    申请日：2011-05-16

    申请人： Wen Tong ,  Peiying Zhu ,  Jianglei Ma ,  Ming Jia

    发明人： Wen Tong ,  Peiying Zhu ,  Jianglei Ma ,  Ming Jia

    IPC分类号： H04K1/10 ,  H04L27/28

    CPC分类号： H04L27/2613 ,  H04B7/04 ,  H04B7/0413 ,  H04B7/0684 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0234 ,  H04L25/0244 ,  H04L27/2602 ,  H04L27/2627 ,  H04W52/42

    摘要： Methods and apparatus are provided for inserting data symbols and pilot symbols in an OFDM (orthogonal frequency division multiplexing) transmission resource utilizing frequency hopping patterns for the data symbols and/or the pilot symbols. Data symbols and pilot symbols are allocated for down link (base station to mobile station) and up link (mobile station to bases station) transmission resources in a two-dimensional time-frequency pattern. For each antenna of a MIMO-OFDM (multiple input multiple output OFDM) communication system, pilot symbols are inserted in a scattered pattern in time-frequency and data symbols are inserted in an identical frequency-hopping pattern in time-frequency as that of other antennas.

    摘要翻译： 提供了使用用于数据符号和/或导频符号的跳频图案在OFDM（正交频分复用）传输资源中插入数据符号和导频符号的方法和装置。 数据符号和导频符号分配给二维时频模式的下行链路（基站到移动台）和上行链路（移动台到基站）的传输资源。 对于MIMO-OFDM（多输入多输出OFDM）通信系统的每个天线，导频符号以时间 - 频率的散射图案插入，并且数据符号以与其它信号的时间频率相同的跳频图案插入 天线。

    Method and system for retransmitting data packets
    97.
    发明授权
    Method and system for retransmitting data packets 有权
    用于重传数据包的方法和系统

    公开(公告)号：US08238460B2

    公开(公告)日：2012-08-07

    申请号：US11795530

    申请日：2005-12-28

    申请人： Wen Tong ,  Ming Jia ,  Jianglei Ma ,  Peiying Zhu

    发明人： Wen Tong ,  Ming Jia ,  Jianglei Ma ,  Peiying Zhu

    IPC分类号： H04L1/02

    CPC分类号： H04L1/0643 ,  H04L1/1867

    摘要： A method and system are provided for minimizing errors by retransmitting packets in a multiple-input-multiple-output (MIMO) space-time coded packet radio. A packet is transmitted using a first STC code mapping, the mapping including well-known symbol operations, and optional signal weighting. When transmission errors are detected the packet is re-transmitted using STC code mappings selected in turn from a deterministic sequence of STC code mappings. The STC code mappings are chosen in accordance with one or more principles.

    摘要翻译： 提供了一种用于通过在多输入多输出（MIMO）空时编码分组无线电中重传分组来最小化错误的方法和系统。 使用第一STC码映射来发送分组，该映射包括公知的符号操作和可选的信号加权。 当检测到传输错误时，使用从确定性序列的STC码映射依次选择的STC码映射来重新发送分组。 根据一个或多个原则选择STC代码映射。

    Methods and systems for enabling feedback in wireless communication networks
    98.
    发明授权
    Methods and systems for enabling feedback in wireless communication networks 有权
    在无线通信网络中实现反馈的方法和系统

    公开(公告)号：US08116262B2

    公开(公告)日：2012-02-14

    申请号：US11630385

    申请日：2005-06-22

    申请人： Hang Zhang ,  Mo-Han Fong ,  Peiying Zhu ,  Jianglei Ma ,  Wen Tong

    发明人： Hang Zhang ,  Mo-Han Fong ,  Peiying Zhu ,  Jianglei Ma ,  Wen Tong

    IPC分类号： H04W4/00

    CPC分类号： H04B7/0478 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0671 ,  H04B7/0673 ,  H04B7/0691 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/005 ,  H04L5/006 ,  H04L5/023 ,  H04L27/2601 ,  H04W48/08 ,  H04W72/042 ,  H04W72/044 ,  H04W72/08 ,  H04W74/06

    摘要： Aspects of the present invention provide additional MAC functionality to support the PHY features of a wireless communication system framework. The additional MAC functionality aids in enabling feedback from wireless terminals to base stations. In some aspects of the invention the feedback is provided on an allocated feedback channel. In other aspects of the invention the feedback is provided by MAC protocol data units (PDU) in a header, mini-header, or subheader. The feedback may be transmitted from the wireless terminal to the base station autonomously by the wireless terminal or in response to an indication from the base station that feedback is requested. Aspects of the invention also provide for allocating feedback resources to form a dedicated feedback channel. One or more of these enhancements is included in a given implementation. Base stations and wireless terminals are also described upon which methods described herein can be implemented.

    摘要翻译： 本发明的方面提供了附加的MAC功能来支持无线通信系统框架的PHY特征。 附加的MAC功能有助于实现从无线终端到基站的反馈。 在本发明的一些方面，在分配的反馈信道上提供反馈。 在本发明的其它方面，反馈由报头，小标题或子报头中的MAC协议数据单元（PDU）提供。 反馈可以由无线终端自主地从无线终端发送到基站，或者响应于来自基站的指示，请求反馈。 本发明的各方面还提供分配反馈资源以形成专用反馈信道。 这些增强中的一个或多个包括在给定的实现中。 还描述了基站和无线终端，其中可以实现本文描述的方法。

    Frame structure, system and method for OFDM communications
    99.
    发明授权
    Frame structure, system and method for OFDM communications 有权
    OFDM通信的帧结构，系统和方法

    公开(公告)号：US08085814B2

    公开(公告)日：2011-12-27

    申请号：US11529223

    申请日：2006-10-02

    申请人： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong

    发明人： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong

    IPC分类号： H04J3/24

    CPC分类号： H04W36/08 ,  H04B7/022 ,  H04B7/04 ,  H04B7/0413 ,  H04B7/0667 ,  H04B7/0697 ,  H04J11/0069 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0048 ,  H04L7/0008 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2627 ,  H04L27/2628 ,  H04L27/2663 ,  H04L27/2665 ,  H04L27/2672 ,  H04L27/2675

    摘要： A method and apparatus are provided for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system, each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols, each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.

    摘要翻译： 提供了一种用于在MIMO-OFDM通信系统内执行采集，同步和小区选择的方法和装置。 执行粗同步以确定搜索窗口。 然后通过测量其第一信号样本位于搜索窗口内的信号样本的子集与已知值之间的相关性来执行精细同步。 相关性在接收信号的频域中进行。 在多输出OFDM系统中，OFDM发射机的每个天线具有唯一的已知值。 已知值作为连续导频符号对发送，每对导频符号在OFDM帧内的子载波频率的相同子集上发送。