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297 条记录 (耗时 0.037 秒)

    Method and System for Retransmitting Data Packets in a Space-Time Coded Radio Communication System
    94.
    发明申请
    Method and System for Retransmitting Data Packets in a Space-Time Coded Radio Communication System 有权
    在时空编码无线电通信系统中重传数据包的方法和系统

    公开(公告)号：US20120331366A1

    公开(公告)日：2012-12-27

    申请号：US13545116

    申请日：2012-07-10

    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： H04L1/18

    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。

    SOFT HANDOFF IN OFDMA SYSTEM
    95.
    发明申请
    SOFT HANDOFF IN OFDMA SYSTEM 有权
    OFDMA系统中的软操作

    公开(公告)号：US20120327905A1

    公开(公告)日：2012-12-27

    申请号：US13597921

    申请日：2012-08-29

    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： H04W36/18

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

    摘要： Soft handoff in an OFDMA system is disclosed. 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 has subcarriers with a subchannel definition, for example, an identical permutation.

    摘要翻译： 披露了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的子载波，例如相同的置换。

    WIRELESS FEEDBACK SYSTEM AND METHOD
    96.
    发明申请
    WIRELESS FEEDBACK SYSTEM AND METHOD 有权
    无线反馈系统及方法

    公开(公告)号：US20120219083A1

    公开(公告)日：2012-08-30

    申请号：US13464640

    申请日：2012-05-04

    申请人： Wen Tong ,  Hosein Nikopourdeilami ,  Amir Keyvam Khandani ,  Hua Xu ,  Ming Jia ,  Peiying Zhu ,  Dong-Sheng Yu

    发明人： Wen Tong ,  Hosein Nikopourdeilami ,  Amir Keyvam Khandani ,  Hua Xu ,  Ming Jia ,  Peiying Zhu ,  Dong-Sheng Yu

    IPC分类号： H04B7/04 ,  H04L27/28

    CPC分类号： H04B7/0478 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/0634 ,  H04B7/0639 ,  H04L69/04 ,  H04L69/14

    摘要： A codebook C is provided in a MIMO transmitter as well as a MIMO receiver. The codebook C will include M codewords ci, where i is a unique codeword index for each codeword ci. Each codeword defines weighting factors to apply to the MIMO signals, and may correspond to channel matrices or vectors to apply to the MIMO signals prior to transmission from the respective antennas of the MIMO transmitter. The present invention creates codeword subsets Sl for each codeword cl of the codebook C. Each codeword subset Sl defines L codewords cj, which are selected from all the codewords ci in the codebook C. The codewords cj in a codeword subset Sl are the L codewords in the entire codebook that best correlate with the corresponding codeword ci.

    摘要翻译： 码本C被提供在MIMO发射机以及MIMO接收机中。 码本C将包括M个码字ci，其中i是每个码字ci的唯一码字索引。 每个码字定义了应用于MIMO信号的加权因子，并且可以对应于在从MIMO发射机的各个天线发送之前应用于MIMO信号的信道矩阵或向量。 本发明为码本C的每个码字cl创建码字子集S1。每个码字子集S1定义从码本C中的所有码字ci中选择的L个码字cj。码字子集S1中的码字cj是L个码字 在整个码本中与相应的码字ci最相关。

    COMMUNICATION SIGNAL DECODING AND SOFT DEMAPPING METHODS AND SYSTEMS
    97.
    发明申请
    COMMUNICATION SIGNAL DECODING AND SOFT DEMAPPING METHODS AND SYSTEMS 有权
    通信信号解码和软解码方法和系统

    公开(公告)号：US20120121047A1

    公开(公告)日：2012-05-17

    申请号：US13358786

    申请日：2012-01-26

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

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

    IPC分类号： H04L27/06

    CPC分类号： H04L25/02 ,  H04L25/03318 ,  H04L2025/03426 ,  H04L2025/03624

    摘要： Symbol detection and soft dempapping methods and systems are provided. Individual subset symbol detection according to an embodiment of the invention involves identifying a search subset of a transmission symbol set for a transmission symbol. For each other transmission symbol in communication signals, multiple search subsets of the transmission symbol set are identified. The multiple search subsets include respective search subsets based on each transmission symbol in either the search subset for the first identified one of the transmission symbols or each of the multiple search subsets identified for a different one of the other transmission symbols. Symbol detection errors may be detected by identifying competing symbols and computing competing distances. Soft demapping may be provided by calculating soft decision results based on detected symbols and weighting the soft decision result.

    摘要翻译： 提供符号检测和软解压方法和系统。 根据本发明的实施例的个体子集符号检测涉及识别用于传输符号的传输符号组的搜索子集。 对于通信信号中的每个其他传输符号，识别传输符号集合的多个搜索子集。 多个搜索子集包括基于针对第一被识别的一个传输符号的搜索子集中的每个传输符号或为其它传输符号中的不同一个标识的多个搜索子集中的每一个的每个传输符号。 可以通过识别竞争符号和计算竞争距离来检测符号检测错误。 可以通过基于检测到的符号计算软判定结果并对软决策结果加权来提供软解映射。

    Methods and systems for orthogonal frequency division multiplexing (OFDM) multiple zone partitioning
    99.
    发明授权
    Methods and systems for orthogonal frequency division multiplexing (OFDM) multiple zone partitioning 有权
    用于正交频分复用（OFDM）多区划分的方法和系统

    公开(公告)号：US08073063B2

    公开(公告)日：2011-12-06

    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： H04K1/10

    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 includes common pilot symbols that can be detected by all receivers receiving the OFDM frame. In some implementations the zone of the second type includes dedicated pilot symbols that are only detectable by a receiver that is aware of pre-processing used to encode the dedicated pilot symbols.

    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，其仅由知道用于编码专用导频符号的预处理的接收机可检测。

    Soft handoff in OFDMA system
    100.
    发明授权
    Soft handoff in OFDMA system 有权
    OFDMA系统中的软切换

    公开(公告)号：US08023466B2

    公开(公告)日：2011-09-20

    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。