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479 条记录 (耗时 0.039 秒)

    Preambles in OFDMA system
    61.
    发明授权
    Preambles in OFDMA system 有权
    OFDMA系统中的前缀

    公开(公告)号：US07961696B2

    公开(公告)日：2011-06-14

    申请号：US11630474

    申请日：2005-06-23

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

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

    IPC分类号： H04B7/208

    CPC分类号： H04L27/2692 ,  H04B7/02 ,  H04B7/0452 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0048 ,  H04L7/043 ,  H04L27/2613 ,  H04L27/265 ,  H04L27/2655 ,  H04L27/2686 ,  H04W24/02

    摘要： The present invention provides a preamble that is inserted into an OFDMA frame and has a common sequence for all the base stations participating in a transmission. The subscriber station performs fine synchronization using the common sequence on the common preamble, and the resulting peaks will provide the locations of candidate base stations. The base station specific search is then performed in the vicinities of those peaks by using base station specific pseudo-noise sequences. With this two stage cell search, the searching window is drastically reduced. The preamble is matched to known values by a respective receiver to decode the signals and permit multiple signals to be transferred from the transmitter to the receiver. The preamble may comprise two parts, Preamble-1 and Preamble-2, which may be used in different systems, including multioutput, multi-input (MIMO) systems.

    摘要翻译： 本发明提供插入到OFDMA帧中并具有参与传输的所有基站的公共序列的前同步码。 用户站使用公共前导码上的公共序列执行精细同步，并且所得到的峰值将提供候选基站的位置。 然后通过使用基站专用伪噪声序列，在那些峰附近执行基站专用搜索。 通过这两个阶段的单元格搜索，搜索窗口大大减少。 前导码由相应的接收机与已知值匹配以对信号进行解码，并允许多个信号从发射机传送到接收机。 前导码可以包括两个部分，即前导码1和前导码2，其可以在不同的系统中使用，包括多输入多输入（MIMO）系统。

    Random access channel protocol
    63.
    发明授权
    Random access channel protocol 有权
    随机接入通道协议

    公开(公告)号：US07924866B2

    公开(公告)日：2011-04-12

    申请号：US11658123

    申请日：2003-12-17

    申请人： Wen Tong ,  Peiying Zhu ,  Nikita D. Vvedenskaya ,  Nikolai L. Likhanov ,  Sergei P. Fedortsov

    发明人： Wen Tong ,  Peiying Zhu ,  Nikita D. Vvedenskaya ,  Nikolai L. Likhanov ,  Sergei P. Fedortsov

    IPC分类号： H04J3/16 ,  H04L12/413 ,  H04W72/00

    CPC分类号： H04W74/0833 ,  H04L12/40143 ,  H04L12/413 ,  H04W28/14 ,  H04W72/10 ,  H04W74/04 ,  H04W74/0866 ,  H04W80/00

    摘要： The present invention provides an improved random access channel protocol, wherein different user elements may be associated with different priority levels. Based on relative priority, the user elements may have different probabilities for deciding when to retransmit a previously transmitted packet upon receiving information from an access point indicating that the packet needs to be retransmitted. A buffer is provided for storing a packet to transmit, and the buffer is associated with a stack counter, which is incremented or decremented to or from a nominal value to determine when to transmit or retransmit the packet stored in the buffer. Based on the relative priority, feedback information from the access point may cause the stack counter for a packet needing to be retransmitted to stay at the nominal value, wherein retransmission will occur at the next available time slot, or it may increase the stack counter by one or more levels.

    摘要翻译： 本发明提供一种改进的随机接入信道协议，其中不同的用户单元可以与不同的优先级相关联。 基于相对优先级，用户单元可能具有不同的概率，用于在从接入点接收到指示需要重发该分组的信息时决定何时重发先前发送的分组。 提供缓冲器用于存储要发送的分组，并且缓冲器与堆栈计数器相关联，该计数器被递增或递减到标称值或从标称值减去，以确定何时发送或重新发送存储在缓冲器中的分组。 基于相对优先级，来自接入点的反馈信息可能导致需要重传的分组的堆栈计数器保持在标称值，其中将在下一个可用时隙发生重传，或者可以通过 一个或多个级别。

    SYSTEM AND METHOD FOR WIRELESS RELAY FRAME STRUCTURE, PROTOCOL, AND OPERATION
    66.
    发明申请
    SYSTEM AND METHOD FOR WIRELESS RELAY FRAME STRUCTURE, PROTOCOL, AND OPERATION 有权
    无线继电器框架结构，协议和操作的系统和方法

    公开(公告)号：US20110038284A1

    公开(公告)日：2011-02-17

    申请号：US12937476

    申请日：2009-04-21

    申请人： Nimal Gamini Senarath ,  Israfil Bahceci ,  Mo-Han Fong ,  Peiying Zhu ,  Derek Yu ,  Hang Zhang ,  Wen Tong ,  Sheng Sun

    发明人： Nimal Gamini Senarath ,  Israfil Bahceci ,  Mo-Han Fong ,  Peiying Zhu ,  Derek Yu ,  Hang Zhang ,  Wen Tong ,  Sheng Sun

    IPC分类号： H04W16/26 ,  H04W80/00 ,  H04W36/30 ,  H04W36/08 ,  H04B7/14

    CPC分类号： H04B7/155 ,  H04W16/26 ,  H04W24/04 ,  H04W36/00 ,  H04W80/02 ,  H04W84/047

    摘要： A relay station is provided for use in a wireless communication system. The wireless communication system includes a plurality of base stations communicatively coupled to a backhaul network and at least one mobile station. The relay station is shared by at least a first base station and a second base station. The relay station includes a transceiver, a controller and relay circuitry. The transceiver transmits signals to and receives signals both base stations and a mobile station. Signals transmitted to the base stations include a single preamble, MAP and FCH. The controller is electrically connected to the transceiver and is operable to measure a signal quality of the mobile station while connected to the first base station. The relay circuitry is electrically connected to the controller and is operable to conduct a phased handoff from the first base station to the second base station based on the signal quality.

    摘要翻译： 提供了一种在无线通信系统中使用的中继站。 无线通信系统包括通信地耦合到回程网络和至少一个移动站的多个基站。 中继站由至少第一基站和第二基站共享。 中继站包括收发器，控制器和继电器电路。 收发器向基站和移动台发送信号并接收信号。 发送到基站的信号包括单个前导码，MAP和FCH。 控制器电连接到收发器，并且可操作以在连接到第一基站时测量移动台的信号质量。 继电器电路电连接到控制器，并且可操作以基于信号质量从第一基站到第二基站进行定相切换。

    Soft handoff for OFDM
    67.
    发明授权
    Soft handoff for OFDM 有权
    OFDM的软切换

    公开(公告)号：US07864735B2

    公开(公告)日：2011-01-04

    申请号：US12343866

    申请日：2008-12-24

    申请人： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong ,  Dong-Sheng Yu

    发明人： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong ,  Dong-Sheng Yu

    IPC分类号： H04W4/00

    CPC分类号： H04W36/18 ,  H04B7/022 ,  H04L1/0618 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0025 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0048 ,  H04L25/0232 ,  H04L27/2613 ,  H04L27/2626 ,  H04L27/2647 ,  H04L27/2655

    摘要： The present invention relates to soft handoffs in an OFDM system. Each mobile terminal measures pilot signal strengths of transmissions from adjacent base stations. If the pilot signal strength for a base station exceeds the defined threshold, that base station is added to an active set list. Each mobile terminal notifies the base stations of their active set lists. By providing the set list to the base station controller and the servicing base station, the mobile terminal identifies the sole servicing base station or triggers a soft handoff mode when multiple base stations appear on the active set list. The soft handoff mode uses a combination of scheduling and space-time coding to affect efficient and reliable handoffs.

    摘要翻译： 本发明涉及OFDM系统中的软切换。 每个移动终端测量来自相邻基站的传输的导频信号强度。 如果基站的导频信号强度超过定义的阈值，则该基站被添加到活动集列表中。 每个移动终端向基站通知其活动集列表。 通过将设置列表提供给基站控制器和服务基站，移动终端识别唯一服务基站，或者当多个基站出现在活动集列表上时触发软切换模式。 软切换模式使用调度和时空编码的组合来影响有效和可靠的切换。

    System and method performing quadrature amplitude modulation by combining co-sets and strongly coded co-set identifiers
    68.
    发明授权
    System and method performing quadrature amplitude modulation by combining co-sets and strongly coded co-set identifiers 有权
    通过组合协同集合和强编码协同标识符来执行正交幅度调制的系统和方法

    公开(公告)号：US07778341B2

    公开(公告)日：2010-08-17

    申请号：US10226174

    申请日：2002-08-23

    申请人： Wen Tong ,  Amir Khandani

    发明人： Wen Tong ,  Amir Khandani

    IPC分类号： H04L5/12

    CPC分类号： H03M13/258 ,  H03M13/2957 ,  H04L1/004 ,  H04L1/0058 ,  H04L1/0059 ,  H04L1/0061 ,  H04L1/0066 ,  H04L1/0071 ,  H04L25/03866 ,  H04L27/2614 ,  H04L27/2615 ,  H04L27/3411 ,  H04L27/3433

    摘要： A method of encoding a stream of data elements is provided which involves splitting the stream of data elements into a first stream and a second stream; encoding the first stream to produce a first encoded stream; performing a constellation mapping using a combination of the first encoded stream and a third stream which is based an the second stream. This may involve defining a signal constellation; defining a plurality of co-sets within the constellation such that a minimum distance between constellation points within each co-set is larger than a minimum distance between any constellation points within the signal constellation; performing said constellation mapping by using the first encoded stream to identify a sequence of co-sets of said plurality of co-sets, and by using the third stream to identify a sequence of constellation points within respective co-sets of the sequence of co-sets identified by said first encoded stream.

    摘要翻译： 提供了一种编码数据元素流的方法，其涉及将数据元素流分解成第一流和第二流; 编码所述第一流以产生第一编码流; 使用基于第二流的第一编码流和第三流的组合来执行星座映射。 这可能涉及定义信号星座; 在所述星座图内定义多个组合，使得每个组合内的星座点之间的最小距离大于所述信号星座图内的任何星座点之间的最小距离; 通过使用第一编码流来识别所述多​​个协同集合的一组集合来执行所述星座映射，并且通过使用第三流来识别共同序列序列的各个组合内的星座点序列， 由所述第一编码流识别的集合。

    Scattered pilot pattern and channel estimation method for MIMO-OFDM systems
    69.
    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：US07778337B2

    公开(公告)日：2010-08-17

    申请号：US11529246

    申请日：2006-09-29

    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以二维时频模式分配给下行链路（基站到移动台）和上行链路（移动台到基站）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。