公开(公告)号：US20130010887A1

公开(公告)日：2013-01-10

申请号：US13617051

申请日：2012-09-14

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： H04B7/02

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.

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。

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。

公开(公告)号：US20120307928A1

公开(公告)日：2012-12-06

申请号：US13394888

申请日：2010-09-21

申请人： Ming Jia ,  Masoud Ebrahimi Tazeh Mahalleh ,  Mohammadhadi Baligh ,  Hua Xu ,  Jianglei Ma ,  Amir Khandani

发明人： Ming Jia ,  Masoud Ebrahimi Tazeh Mahalleh ,  Mohammadhadi Baligh ,  Hua Xu ,  Jianglei Ma ,  Amir Khandani

IPC分类号： H04B7/06

CPC分类号： H04B7/0667 ,  H04B7/0669 ,  H04B7/0671 ,  H04L1/0625 ,  H04L27/2601

摘要： In a method of transmitting a data stream from a transmitter in a multiple-input-multiple-output (MIMO) wireless communication system, where the transmitter comprises a plurality of transmit antennas, a discrete Fourier transform (DFT) is applied to the data stream to generate a plurality of symbol sequences; symbols of a first symbol sequence from the plurality of symbol sequences are paired with symbols of a second symbol sequence from the plurality of symbol sequences to generate a plurality of symbol pairs, wherein the pairing results in an orphan symbol; a space-time block code (STBC) is applied to the symbol pairs to generate a plurality of sets of STBC symbols, each set of STBC symbols being associated with a corresponding one of the plurality of antennas; a cyclic delay diversity (CDD) operation is applied to the orphan symbol to generate a plurality of CDD symbols, each CDD symbol being associated with a corresponding one of the plurality of antennas; and each one of the antennas transmits the corresponding set of STBC symbols and the corresponding CDD symbol.

摘要翻译： 在多输入多输出（MIMO）无线通信系统中的发射机发送数据流的方法中，其中发射机包括多个发射天线，将离散傅立叶变换（DFT）应用于数据流 以产生多个符号序列; 来自多个符号序列的第一符号序列的符号与来自多个符号序列的第二符号序列的符号配对，以产生多个符号对，其中所述配对导致孤立符号; 将空时块码（STBC）应用于符号对以产生多组STBC符号，每组STBC符号与多个天线中的相应一个天线相关联; 循环延迟分集（CDD）操作被应用于孤立符号以产生多个CDD符号，每个CDD符号与多个天线中的相应一个天线相关联; 并且每个天线发送相应的一组STBC符号和相应的CDD符号。

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。

公开(公告)号：US20110310847A1

公开(公告)日：2011-12-22

申请号：US13221579

申请日：2011-08-30

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.

公开(公告)号：US20110306381A1

公开(公告)日：2011-12-15

申请号：US12816178

申请日：2010-06-15

申请人： Ming Jia ,  Jianglei Ma

发明人： Ming Jia ,  Jianglei Ma

IPC分类号： H04W52/04 ,  H01Q11/12 ,  H04B1/04 ,  H04B1/02

CPC分类号： H04B7/024 ,  H04B7/0619 ,  H04W52/143 ,  H04W52/40

摘要： A system and method for transparent coordinated beam-forming are provided. A method for transmitting information includes determining correlations between communications devices served by a communications controller and communications devices served by neighboring communications controllers, selecting a communications device from the communications devices served by the communications controller, adjusting a manner of transmission of a transmission containing information to the selected communications device based on a correlation for the selected communications device, and transmitting the transmission to the selected communications device.

摘要翻译： 提供了一种用于透明协调波束形成的系统和方法。 一种用于发送信息的方法包括确定由通信控制器服务的通信设备和由相邻通信控制器服务的通信设备之间的相关性，从由通信控制器服务的通信设备中选择通信设备，调整包含信息的传输的传输方式 所选择的通信设备基于所选择的通信设备的相关性，以及将所述传输发送到所选择的通信设备。

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。

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。

公开(公告)号：US20110222504A1

公开(公告)日：2011-09-15

申请号：US13114579

申请日：2011-05-24

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： H04W72/04

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-I 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。