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    ADAPTIVE TWO-DIMENSIONAL CHANNEL INTERPOLATION
    121.
    发明申请
    ADAPTIVE TWO-DIMENSIONAL CHANNEL INTERPOLATION 有权
    自适应二维通道插值

    公开(公告)号：US20090213948A1

    公开(公告)日：2009-08-27

    申请号：US12064566

    申请日：2006-08-22

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

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

    IPC分类号： H04J11/00 ,  H04L27/00 ,  H04L27/28

    CPC分类号： H04L27/2611 ,  H04B7/06 ,  H04B7/08 ,  H04L5/0007 ,  H04L5/0023 ,  H04L25/0226 ,  H04L25/0232 ,  H04L27/2626 ,  H04L27/2647

    摘要： A method and apparatus for improving channel estimation within an OFDM communication system. Channel estimation in OFDM is usually performed with the aid of pilot symbols. The pilot symbols are typically spaced in time and frequency. The set of frequencies and times at which pilot symbols are inserted is referred to as a pilot pattern. In some cases, the pilot pattern is a diagonal-shaped lattice, either regular or irregular. The method first interpolates in the direction of larger coherence (time or frequency). Using these measurements, the density of pilot symbols in the direction of faster change will be increased thereby improving channel estimation without increasing overhead. As such, the results of the first interpolating step can then be used to assist the interpolation in the dimension of smaller coherence (time or frequency).

    摘要翻译： 一种用于改善OFDM通信系统内的信道估计的方法和装置。 OFDM中的信道估计通常借助于导频符号来执行。 导频符号通常在时间和频率上间隔开。 将导频符号插入的频率和时间的集合称为导频模式。 在一些情况下，导频图案是对角线形格子，规则的或不规则的。 该方法首先在较大相干性（时间或频率）的方向内插。 使用这些测量，导频符号在更快变化方向上的密度将增加，从而改善信道估计而不增加开销。 因此，第一内插步骤的结果然后可以用于辅助尺寸较小的相干性（时间或频率）的内插。

    Scattered pilot pattern and channel estimation method for MIMO-OFDM systems
    122.
    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：US07545734B2

    公开(公告)日：2009-06-09

    申请号：US11819690

    申请日：2007-06-28

    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： H04J7/216 ,  H04J11/00 ,  H04W4/00

    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： A method and apparatus are provided for reducing the number of pilot symbols within a MIMO-OFDM communication system, and for improving channel estimation within such a system. For each transmitting antenna in an OFDM transmitter, pilot symbols are encoded so as to be unique to the transmitting antenna. The encoded pilot symbols are then inserted into an OFDM frame to form a diamond lattice, the diamond lattices for the different transmitting antennae using the same frequencies but being offset from each other by a single symbol in the time domain. At the OFDM receiver, a channel response is estimated for a symbol central to each diamond of the diamond lattice using a two-dimensional interpolation. The estimated channel responses are smoothed in the frequency domain. The channel responses of remaining symbols are then estimated by interpolation in the frequency domain.

    摘要翻译： 提供了一种用于减少MIMO-OFDM通信系统内的导频符号的数量并用于改善这种系统内的信道估计的方法和装置。 对于OFDM发射机中的每个发射天线，导频符号被编码为对于发射天线是唯一的。 然后将编码的导频符号插入到OFDM帧中以形成菱形晶格，使用相同频率的不同发射天线的菱形晶格，但是在时域中通过单个符号彼此偏移。 在OFDM接收机处，使用二维插值来估计针对钻石晶格的每个菱形的中心的符号的信道响应。 估计的信道响应在频域中被平滑化。 然后通过在频域中的内插来估计剩余符号的信道响应。

    Soft handoff in Ofdma system
    123.
    发明申请
    Soft handoff in Ofdma system 有权
    Ofdma系统中的软切换

    公开(公告)号：US20090129334A1

    公开(公告)日：2009-05-21

    申请号：US11630473

    申请日：2005-06-22

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

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

    IPC分类号： H04W36/00

    CPC分类号： H04W36/18 ,  H04B7/022 ,  H04B7/0691

    摘要： The soft handoff in an OFDMA system. If the pilot signal strength for a base station exceeds the defined threshold, the base station is added to an active set list. Subcarriers in a plurality of orthogonal frequency division multiplexing (OFDM) symbols are divided and allocated into subchannels. The OFDM symbols are divided and multiplexed. A soft handoff zone with a first dimension of the subchannels and a second dimension of the divided and multiplexed OFDM symbols is defined. The soft handoff zone have subcarriers with a subchannel definition, for example, an identical permutation.

    摘要翻译： OFDMA系统中的软切换。 如果基站的导频信号强度超过定义的阈值，则将基站添加到活动集列表中。 多个正交频分复用（OFDM）符号中的子载波被划分并分配给子信道。 OFDM符号被分割和多路复用。 定义了具有子信道的第一维度和分割和多路复用的OFDM符号的第二维度的软切换区域。 软切换区具有子信道定义，例如相同的置换。

    SOFT HANDOFF FOR OFDM
    124.
    发明申请
    SOFT HANDOFF FOR OFDM 有权
    OFDM的软切换

    公开(公告)号：US20090103494A1

    公开(公告)日：2009-04-23

    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： H04W36/00

    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。

    Method and System for Retransmitting Data Packets
    125.
    发明申请
    Method and System for Retransmitting Data Packets 有权
    重新发送数据包的方法和系统

    公开(公告)号：US20090046797A1

    公开(公告)日：2009-02-19

    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： H04B7/02

    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。

    Flexible frame structure for wireless communication
    129.
    发明授权
    Flexible frame structure for wireless communication 有权

    公开(公告)号：US11855918B2

    公开(公告)日：2023-12-26

    申请号：US16887361

    申请日：2020-05-29

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

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

    IPC分类号： H04L5/00 ,  H04L27/26

    CPC分类号： H04L5/0044 ,  H04L27/2628

    摘要： Current radio frame structures in Long-Term Evolution (LTE) and New Radio (NR) have some restrictions. A frame structure is disclosed herein that aims to provide more flexibility. Embodiments of the flexible frame structure include different parameters that are flexible, i.e. that are configurable. A non-exhaustive list of parameters that may be configurable include: length of the frame; length of a subframe (if a subframe is even defined); length of a slot and/or number of symbol blocks in a slot (if a slot is even defined); length of the CP and/or data portion in a symbol block, or ratio of CP to data portion, which may vary between symbol blocks; downlink/uplink switching gap length, etc.

    LOW PAPR WAVEFORM FOR mmW
    130.
    发明申请
    LOW PAPR WAVEFORM FOR mmW 有权
    低PAPR波形mmW

    公开(公告)号：US20160353446A1

    公开(公告)日：2016-12-01

    申请号：US14943986

    申请日：2015-11-17

    申请人： Javad Abdoli ,  Jianglei Ma ,  Ming Jia ,  Wen Tong

    发明人： Javad Abdoli ,  Jianglei Ma ,  Ming Jia ,  Wen Tong

    IPC分类号： H04W72/04 ,  H04L27/26

    CPC分类号： H04L27/2614 ,  H04J13/0007 ,  H04L5/0021 ,  H04L5/0023 ,  H04L25/03834 ,  H04L27/2634 ,  H04L27/264

    摘要： Methods and systems for signal transmission in millimeter wave (mmW) range. A set of sequences is used to encode a data signal for one layer in a group of layers. Each sequence in the set of sequences has a length equal to the number of resources shared among the group of layers. At least a portion of the sequences have a low density of non-zero values, and the non-zero values are assigned to a subset of the shared resources. Each sequence assigns a non-zero value to at most one resource of the subset of shared resources, and all non-zero values assigned by all sequences have equal power amplitudes.

    摘要翻译： 毫米波（mmW）范围内信号传输的方法和系统。 一组序列用于对一组图层中的一层的数据信号进行编码。 该组序列中的每个序列具有等于该组图层之间共享的资源数量的长度。 序列的至少一部分具有非零值的低密度，并且非零值被分配给共享资源的子集。 每个序列将非零值分配给共享资源子集的最多一个资源，并且由所有序列分配的所有非零值具有相等的功率幅度。