利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

333 条记录 (耗时 0.039 秒)

    Methods and systems for transmission of orthogonal frequency division multiplexed symbols
    55.
    发明授权
    Methods and systems for transmission of orthogonal frequency division multiplexed symbols 有权
    用于传输正交频分复用符号的方法和系统

    公开(公告)号：US07813261B2

    公开(公告)日：2010-10-12

    申请号：US11887115

    申请日：2006-03-30

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

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

    IPC分类号： H04J11/00 ,  H04J3/26 ,  H04H20/71 ,  H04L23/02

    CPC分类号： H04L27/2602 ,  H04L1/0003 ,  H04L1/0009 ,  H04L27/2655

    摘要： In some embodiments of the present invention there is provided a frame structure for transmitting an integer number of OFDM symbols in which some of the OFDM symbols are to be transmitted in a unicast format and some of the OFDM symbols are to be transmitted in a broadcast format. The frame structure includes partitioning of a frame into at least two portions to accommodate both unicast and broadcast modes in the frame. The frame structure is used for transmitting multiple frames in a serial manner from at least one transmitter. The unicast mode supports transmission of OFDM symbols from a single transmitter to a single receiver. The broadcast mode supports transmission of OFDM symbols from multiple transmitters to all receivers within range of the multiple transmitters. The multicast mode supports transmission of OFDM symbols from multiple transmitters to multiple receivers within range of the multiple transmitters.

    摘要翻译： 在本发明的一些实施例中，提供了一种用于发送整数个OFDM符号的帧结构，其中一些OFDM符号将以单播格式发送，并且一些OFDM符号将以广播格式发送 。 帧结构包括将帧划分成至少两个部分以适应帧中的单播和广播模式。 帧结构用于从至少一个发射机以串行方式发送多个帧。 单播模式支持将OFDM符号从单个发射机传输到单个接收机。 广播模式支持从多个发射机向多个发射机的范围内的所有接收机传输OFDM符号。 组播模式支持将多个发射机的OFDM符号从多个发射机的范围内传输到多个接收机。

    Methods and Systems For Ofdm Multiple Zone Partitioning
    58.
    发明申请
    Methods and Systems For Ofdm Multiple Zone Partitioning 有权
    Ofdm多区域分区方法与系统

    公开(公告)号：US20080232504A1

    公开(公告)日：2008-09-25

    申请号：US12064563

    申请日：2006-08-23

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

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

    IPC分类号： H04B7/02

    CPC分类号： H04L5/0051 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0618 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/005 ,  H04L25/02 ,  H04L27/2602 ,  H04L27/2613 ,  H04L27/2647 ,  H04W52/325

    摘要： Aspects of the invention include methods and devices for inserting data and pilot symbols into Orthogonal Frequency Division Multiplexing (OFDM) frames having a time domain and a frequency domain. A method involves inserting in at least one zone of a first type a two dimensional array of data and pilot symbols in time and frequency and inserting in at least one zone of a second type a two dimensional array of data and pilot symbols in time and frequency. In some implementations the zone of the first type comprises common pilot symbols that can be detected by all receivers receiving the OFDM frame. In some implementations the zone of the second type comprises dedicated pilot symbols that are only detectable by a receiver that is aware of pre-processing used to encode the dedicated pilot symbols. According to various embodiments of the invention, the zones of the first and second types can be partitioned in the OFDM frame based on time division multiplexing (TDM), frequency division multiplexing (FDM) or combined TDM/FDM. Examples of types of transmissions that could be transmitted in different zones of a single OFDM frame are OFDM multiple input multiple output (MIMO) transmissions and OFDM beam forming transmissions.

    摘要翻译： 本发明的方面包括用于将数据和导频符号插入具有时域和频域的正交频分复用（OFDM）帧的方法和装置。 一种方法包括在时间和频率上插入数据和导频符号的二维阵列的第一类型的至少一个区域，并在第二类型的至少一个区域中插入时间和频率的数据和导频符号的二维阵列 。 在一些实现中，第一类型的区域包括可由接收OFDM帧的所有接收机检测的公共导频符号。 在一些实施方式中，第二类型的区域包括专用导频符号，其仅可以被知道用于对专用导频符号进行编码的预处理的接收机检测。 根据本发明的各种实施例，可以基于时分复用（TDM），频分复用（FDM）或组合TDM / FDM，在OFDM帧中划分第一类和第二类的区。 可以在单个OFDM帧的不同区域中传输的传输类型的示例是OFDM多输入多输出（MIMO）传输和OFDM波束形成传输。

    System and Method for Frequency Division Multiple Access Communications
    59.
    发明申请
    System and Method for Frequency Division Multiple Access Communications 有权
    用于频分多址通信的系统和方法

    公开(公告)号：US20080219235A1

    公开(公告)日：2008-09-11

    申请号：US11996463

    申请日：2006-07-27

    申请人： Jianglei Ma ,  Ming Jia ,  Wen Tong ,  Peiying Zhu ,  Hua Xu ,  Moussa Abdi ,  Evelyne Le Strat ,  Sarah Boumendil

    发明人： Jianglei Ma ,  Ming Jia ,  Wen Tong ,  Peiying Zhu ,  Hua Xu ,  Moussa Abdi ,  Evelyne Le Strat ,  Sarah Boumendil

    IPC分类号： H04B7/208

    CPC分类号： H04B7/2621 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0051

    摘要： A method and system for wireless frequency division multiple access communications in the uplink and/or downlink directions, having an improved pilot insertion scheme for single carrier based communications is provided. A first time duration for transmission of a data payload block (7) is established, and the transmission is processed using a first frequency domain or a time domain. A second time duration for transmission of at least one pilot block (70) is established, and the transmission is processed using a second frequency domain or the time domain, the second time duration (70) is not greater than the first time duration (7).

    摘要翻译： 提供了一种用于上行链路和/或下行链路方向上的无线频分多址通信的方法和系统，其具有用于基于单载波的通信的改进的导频插入方案。 建立用于发送数据有效载荷块（7）的第一时间段，并且使用第一频域或时域处理传输。 建立用于发送至少一个导频块（70）的第二持续时间，并且使用第二频域或时域处理该传输，第二持续时间（70）不大于第一持续时间（7） ）。