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297 条记录 (耗时 0.041 秒)

    SPACE-TIME BLOCK CODING SYSTEMS AND METHODS
    51.
    发明申请
    SPACE-TIME BLOCK CODING SYSTEMS AND METHODS 有权
    空间块编码系统和方法

    公开(公告)号：US20090080566A1

    公开(公告)日：2009-03-26

    申请号：US11547187

    申请日：2004-04-01

    申请人： Wen Tong ,  Ming Jia ,  Peiying Zhu ,  Alexandre Mikhailovich Chloma ,  Mikhail Germanovich Bakouline ,  Vitali Borisovich Kreindelin

    发明人： Wen Tong ,  Ming Jia ,  Peiying Zhu ,  Alexandre Mikhailovich Chloma ,  Mikhail Germanovich Bakouline ,  Vitali Borisovich Kreindelin

    IPC分类号： H04L27/00

    CPC分类号： H04L1/0618

    摘要： Althrough orthonormal space-time coding matrices provide for optimal communication system performance in that associated correlation matrices include no non-zero off-diagonal elements, unity code rate orthonormal coding matrices are difficult to identify for arbitrary communication network equipment. According to embodiments of the present invention, non-orthonormal space-time coding matrices, for which associated correlation matrices include non-zero off-diagonal elements, are used to encode data symbols. The non-orthonormal space-time coding matrices are more easily determined, and undesirable effects of the non-zero off-diagonal components are reduced by selecting a coding matrix from among a number of such matrices. For example, a particular space-time coding matrix may be selected from a number of generated space-time coding matrices based on a number of non-zero off-diagonal elements or a power of a trace of the associated correlation matrices.

    摘要翻译： 通过正交空时编码矩阵提供最佳通信系统性能，因为相关联的相关矩阵不包括非零非对角元素，单位码率正交编码矩阵难以识别任意通信网络设备。 根据本发明的实施例，用于相关联的相关矩阵包括非零非对角元素的非正交空时编码矩阵用于对数据符号进行编码。 非正交空时编码矩阵更容易确定，并且通过从多个这样的矩阵中选择编码矩阵来减少非零非对角分量的不期望的影响。 例如，可以基于非零非对角元素的数量或相关联的相关矩阵的轨迹的幂来从多个生成的空时编码矩阵中选择特定时空编码矩阵。

    Methods and Systems For Ofdm Multiple Zone Partitioning
    54.
    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
    55.
    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） ）。

    Phase offset spatial multiplexing
    57.
    发明授权
    Phase offset spatial multiplexing 有权
    相位偏移空间复用

    公开(公告)号：US07356089B2

    公开(公告)日：2008-04-08

    申请号：US10655012

    申请日：2003-09-05

    申请人： Ming Jia ,  Peiying Zhu ,  Wen Tong ,  Christian Dubuc

    发明人： Ming Jia ,  Peiying Zhu ,  Wen Tong ,  Christian Dubuc

    IPC分类号： H04B7/02 ,  H04L27/10 ,  H04L23/02

    CPC分类号： H04B7/0417 ,  H04B7/0682 ,  H04B7/10 ,  H04L1/0025 ,  H04L1/0612 ,  H04L1/0625 ,  H04L1/0656 ,  H04L25/0206 ,  H04L27/2602

    摘要： A rotation by a phase offset is applied to symbols to be transmitted by one antenna relative to symbols to be transmitted from another antenna in a wireless communication system employing multi-element antennas at the transmitter. Such a phase offset allows the functionality of a MIMO system to be maintained when a MIMO channel degenerates. Advantageously, a MIMO system using the new signal design may provide a level of performance in a rich-scattering environment that is equivalent to a MIMO system using a known signal design. Furthermore, a MIMO system employing embodiments of the present invention may show significantly improvements in robustness over conventional MIMO systems.

    摘要翻译： 通过相位偏移的旋转被应用于将由一个天线相对于在发射机处采用多元天线的无线通信系统中的另一个天线发送的符号要发送的符号。 当MIMO信道退化时，这种相位偏移允许维持MIMO系统的功能。 有利地，使用新信号设计的MIMO系统可以在丰富散射环境中提供等效于使用已知信号设计的MIMO系统的性能水平。 此外，采用本发明的实施例的MIMO系统可以显示出超常的MIMO系统的鲁棒性的显着改进。

    Preambles in Ofdma System
    58.
    发明申请
    Preambles in Ofdma System 有权
    Ofdma系统中的前导码

    公开(公告)号：US20080039107A1

    公开(公告)日：2008-02-14

    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： H04J11/00

    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。

    Scattered pilot pattern and channel estimation method for MIMO-OFDM systems
    59.
    发明申请
    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：US20070053282A1

    公开(公告)日：2007-03-08

    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： H04J11/00

    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。