公开(公告)号：US20070058521A1

公开(公告)日：2007-03-15

申请号：US11519149

申请日：2006-09-12

申请人： Feng Guo ,  Hongwei Yang ,  Dong Li

发明人： Feng Guo ,  Hongwei Yang ,  Dong Li

IPC分类号： H04J11/00

CPC分类号： H04L27/2656 ,  H04L5/0023 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2675

摘要： The present invention relates to technique for frame synchronization in a distributed MIMO-OFDM system, and the method thereof comprises: generating step: generating preambles for synchronization at respective transmitting antennas using PN sequences with different lengths which have one-to-one correspondence to the respective transmitting antennas by a transmitter; locating step: performing calculation using correlation calculators with width of window corresponding to the lengths of the PN sequences to locate head of frame by a receiver. The present invention proposes a solution for frame synchronization using sequences with non-equal periods in a distributed MIMO-OFDM system, and head of the frames transmitting from respective transmitting antennas can be accurately found using correlation calculation at a receiver by means of the technique. Since the PN sequences with different lengths are used at respective transmitting antennas to form corresponding preambles, when a correlation calculator corresponding to a certain transmitting antenna is used, all data or preambles at other antennas can not produce interference, i.e. delay between distributed transmitting antennas can not has an effect on detection of head of frame at a certain transmitting antenna.

摘要翻译： 本发明涉及分布式MIMO-OFDM系统中的帧同步技术，其方法包括：生成步骤：使用具有一个一对应对应的不同长度的PN序列，在各个发射天线上产生用于同步的前同步码 各发射天线; 定位步骤：使用具有对应于PN序列的长度的窗口宽度的相关计算器来执行计算，以由接收器定位帧的头部。 本发明提出了一种在分布式MIMO-OFDM系统中使用具有不等周期的序列的帧同步的解决方案，并且可以通过该技术在接收机处使用相关计算来精确地找到从各个发送天线发送的帧的头部。 由于在各个发射天线使用不同长度的PN序列来形成相应的前导码，所以当使用与特定发射天线相对应的相关计算器时，其他天线的所有数据或前同步码不能产生干扰，即分布式发射天线之间的延迟 对某个发射天线的帧头检测没有影响。

公开(公告)号：US20090303866A1

公开(公告)日：2009-12-10

申请号：US12296841

申请日：2007-04-09

申请人： Dong Li ,  Guosong Li ,  Xialong Zhu ,  Hongwei Yang ,  Liyu Cai

发明人： Dong Li ,  Guosong Li ,  Xialong Zhu ,  Hongwei Yang ,  Liyu Cai

IPC分类号： H04J11/00 ,  H04L27/00

CPC分类号： H04L25/03159 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0668 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/0046 ,  H04L27/2605 ,  H04L27/261 ,  H04L27/2636

摘要： A method and device for the baseband process of space-time/space-frequency/spatial diversity transmitter in the SC-FDMA system, the device is characterized in that: 1) an encoding means is connected to the output end of the M-point DFT module; 2) a space-time encoding means, for encoding the corresponding symbol of at least two adjacent symbol sets, and outputting at least two data sets; each sub-carrier mapping means maps respectively each data set to the corresponding antenna, so that the mapped data satisfy the requirements: The symbols mapped on each antenna keep the same sequence as the M symbols outputted by the M-point DFT module; the mapped symbols keep the same sub-carrier interval; the M data of each mapped SC-FDMA symbol are the M outputted data of the DFT module, or the inverse of the M outputted data, or the complex conjugate of the M outputted data, or the inverse complex conjugate of the M outputted data. The present invention implements effective space diversity, reduces PAPR, and makes frequency domain equalization feasible.

摘要翻译： 一种用于SC-FDMA系统中的时空/空频/空间分集发射机基带处理的方法和装置，其特征在于：1）编码装置连接到M点的输出端 DFT模块; 2）空时编码装置，用于编码至少两个相邻符号集的对应符号，并输出至少两个数据集; 每个子载波映射装置分别将每个数据集映射到相应的天线，使得映射的数据满足要求：映射在每个天线上的符号保持与M点DFT模块输出的M个符号相同的序列; 映射的符号保持相同的子载波间隔; 每个映射的SC-FDMA符号的M数据是DFT模块的M个输出数据，或M个输出数据的逆，或M个输出数据的复共轭，或M个输出数据的反复共轭。 本发明实现有效的空间分集，减少PAPR，使得频域均衡成为可能。

公开(公告)号：US07397874B2

公开(公告)日：2008-07-08

申请号：US11103618

申请日：2005-04-12

申请人： Dong Li ,  Hongwei Yang ,  Liyu Cai

发明人： Dong Li ,  Hongwei Yang ,  Liyu Cai

IPC分类号： H04B7/10

CPC分类号： H04B7/0891 ,  H04B7/04 ,  H04B7/0854

摘要： The present invention discloses a V-BLAST detection method for a MIMO system, including: a first detecting step for acquiring in sequence the old detection components of a transmitting symbol vector with the optimum ordering-successive interference cancellation detection method; a second detecting step for taking the detection component with the highest space diversity degree among the old detection components as a first new lo detection component, and acquiring in sequence the other new detection components of the transmitting symbol vector in an inverse order of the optimum detection order with the optimum ordering-successive interference cancellation detection method; an outputting step for outputting the first new detection component and the other new is detection components as the final detection result. The method according to the invention employs the outer close loop iteration technology to further reduce inter-layer error propagation of V-BLAST. This method has less complexity.

摘要翻译： 本发明公开了一种MIMO系统的V-BLAST检测方法，包括：第一检测步骤，用于以最佳排序连续干扰消除检测方法依次获取发送符号向量的旧检测分量; 第二检测步骤，用于将旧检测部件中具有最高空间分集度的检测部件作为第一新的检测部件，并且以最佳检测的相反顺序依次获取发送符号向量的其他新检测部件 采用最优排序顺序干扰消除检测方法; 用于输出第一新检测组件的输出步骤和其他新的检测组件作为最终检测结果。 根据本发明的方法采用外闭环迭代技术来进一步减少V-BLAST的层间误差传播。 这种方法的复杂性较低。

公开(公告)号：US20120289275A1

公开(公告)日：2012-11-15

申请号：US13521901

申请日：2010-01-13

申请人： Dong Li ,  Hao Liu ,  Hongwei Yang ,  Yang Song

发明人： Dong Li ,  Hao Liu ,  Hongwei Yang ,  Yang Song

IPC分类号： H04W72/08 ,  H04W24/02

CPC分类号： H04B7/0632 ,  H04B7/024 ,  H04B7/0626 ,  H04B7/0639

摘要： A mobile terminal is provided in the present invention, comprising: a channel state information feedback calculating unit configured to calculate a channel state information feedback between the mobile terminal and a serving cell of the mobile terminal and those between the mobile terminal and all cooperating cells; a channel quality information feedback calculating unit configured to calculate a channel quality information feedback for the serving cell of the mobile terminal; and a transmission unit configured to transmit the channel state information feedbacks and the channel quality information feedback to the serving cell. The present invention greatly improves the performance of a LTE-A system and greatly reduces feedback overhead. The present invention is a scalable feedback solution and may be flexibly applied to various coordinated multipoint transmission scenarios.

摘要翻译： 本发明提供一种移动终端，包括：信道状态信息反馈计算单元，被配置为计算移动终端与移动终端的服务小区之间的信道状态信息反馈以及移动终端与所有合作小区之间的信道状态信息反馈; 信道质量信息反馈计算单元，被配置为计算移动终端的服务小区的信道质量信息反馈; 以及发送单元，被配置为将信道状态信息反馈和信道质量信息反馈发送到服务小区。 本发明大大提高了LTE-A系统的性能，大大降低了反馈开销。 本发明是可扩展的反馈解决方案，并且可以灵活地应用于各种协调的多点传输场景。

公开(公告)号：US08238307B2

公开(公告)日：2012-08-07

申请号：US12674092

申请日：2008-08-13

申请人： Hongwei Yang ,  Liyu Cai ,  Keying Wu ,  Dong Li

发明人： Hongwei Yang ,  Liyu Cai ,  Keying Wu ,  Dong Li

IPC分类号： H04W4/00 ,  H04W36/00 ,  H04J1/00

CPC分类号： H04B7/022 ,  H04B7/0413

摘要： A Macro-Diversity HandOver (MDHO) solution based on multi-User MIMO is provided. Multiple base stations (BSs) serve the MDHO zone. By jointly precoding the modulated signals to be sent, the multiple BSs send the precoded signals to the multiple mobile stations (MSs) over the same time-frequency resources. The signal to be sent is transmitted to the multiple MSs in the MDHO zone. Due to the adoption of the precoding technique, each MS makes no or small interference to other MSs. Since the multiple BSs that serve one MDHO zone serve multiple MSs over the same time-frequency resources, the system capacity in the MDHO zone is greatly improved.

摘要翻译： 提供了一种基于多用户MIMO的宏分集切换（MDHO）解决方案。 多个基站（BS）服务于MDHO区域。 通过联合预编码要发送的调制信号，多个BS通过相同的时间 - 频率资源向多个移动站（MS）发送预编码的信号。 要发送的信号被发送到MDHO区域中的多个MS。 由于采用了预编码技术，每个MS对其他MS没有任何或小的干扰。 由于服务于一个MDHO区域的多个BS在相同的时间 - 频率资源上服务于多个MS，所以MDHO区域中的系统容量大大提高。

公开(公告)号：US20120147992A1

公开(公告)日：2012-06-14

申请号：US13390796

申请日：2009-08-18

申请人： Hongwei Yang ,  Dong Li ,  Keying Wu

发明人： Hongwei Yang ,  Dong Li ,  Keying Wu

IPC分类号： H04B15/00 ,  H04B1/02

CPC分类号： H04B7/0473 ,  H04B7/0413 ,  H04L25/03898 ,  H04L25/03961

摘要： The present invention discloses a method and apparatus for constructing a codebook. The method comprises: receiving grouping information on a plurality of transmit antennas of a base station: obtaining a channel model for a channel between a mobile terminal and the base station; and determining an optimal precoding matrix corresponding to each antenna group according to the grouping information and the channel model, so as to construct a codebook used for precoding. The present invention further discloses a method and apparatus for selecting a precoding matrix, as well as a method, apparatus and system for precoding.

摘要翻译： 本发明公开了一种构造码本的方法和装置。 该方法包括：在基站的多个发射天线上接收分组信息：获取移动终端与基站之间的信道的信道模型; 以及根据分组信息和信道模型确定与每个天线组对应的最佳预编码矩阵，以便构​​造用于预编码的码本。 本发明还公开了一种用于选择预编码矩阵的方法和装置，以及用于预编码的方法，装置和系统。

公开(公告)号：US08248909B2

公开(公告)日：2012-08-21

申请号：US12296841

申请日：2007-04-09

申请人： Dong Li ,  Guosong Li ,  Xialong Zhu ,  Hongwei Yang ,  Liyu Cai

发明人： Dong Li ,  Guosong Li ,  Xialong Zhu ,  Hongwei Yang ,  Liyu Cai

IPC分类号： H04J11/00

CPC分类号： H04L25/03159 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0668 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/0046 ,  H04L27/2605 ,  H04L27/261 ,  H04L27/2636

摘要： A method and device for the baseband process of space-time/space-frequency/spatial diversity transmitter in the SC-FDMA system, the device is characterized in that: 1) an encoding means is connected to the output end of the M-point DFT module; 2) a space-time encoding means, for encoding the corresponding symbol of at least two adjacent symbol sets, and outputting at least two data sets; each sub-carrier mapping means maps respectively each data set to the corresponding antenna, so that the mapped data satisfy the requirements: The symbols mapped on each antenna keep the same sequence as the M symbols outputted by the M-point DFT module; the mapped symbols keep the same sub-carrier interval; the M data of each mapped SC-FDMA symbol are the M outputted data of the DFT module, or the inverse of the M outputted data, or the complex conjugate of the M outputted data, or the inverse complex conjugate of the M outputted data. The present invention implements effective space diversity, reduces PAPR, and makes frequency domain equalization feasible.

摘要翻译： 一种用于SC-FDMA系统中的时空/空频/空间分集发射机基带处理的方法和装置，其特征在于：1）编码装置连接到M点的输出端 DFT模块; 2）空时编码装置，用于编码至少两个相邻符号集的对应符号，并输出至少两个数据集; 每个子载波映射装置分别将每个数据集映射到相应的天线，使得映射的数据满足要求：映射在每个天线上的符号保持与M点DFT模块输出的M个符号相同的序列; 映射的符号保持相同的子载波间隔; 每个映射的SC-FDMA符号的M数据是DFT模块的M个输出数据，或M个输出数据的逆，或M个输出数据的复共轭，或M个输出数据的反复共轭。 本发明实现有效的空间分集，减少PAPR，使得频域均衡成为可能。

公开(公告)号：US20110207487A1

公开(公告)日：2011-08-25

申请号：US13125291

申请日：2008-10-30

申请人： Hongwei Yang ,  Dong Li

发明人： Hongwei Yang ,  Dong Li

IPC分类号： H04B7/26

CPC分类号： H04W4/18 ,  H04W88/08

摘要： The current multi-base station cooperative communication technology could only provide one type of cooperative communication fixedly, and this results in that either the amount of data exchange between the base stations is huge and the latency is increased, or the optimum gain can not be obtained. To address this problem, the invention proposes a switching technology for collaboration type in multi-sector cooperative communication. The base station equipment dominating the sector determines one or more cooperating sectors of the mobile terminal, determines the type of the multi-sector cooperative communication provided cooperatively with said one or more cooperating sectors, based on information of said one or more cooperating sectors according to predefined rules, and cooperates with said one or more cooperating sectors and provides, for the mobile terminal, the multi-sector cooperative communication of the corresponding determined type. According to the invention, high speed exchange of the complete channel information and data are conducted between the same-cell sectors, and the cooperative gain is increased; none or few of data backhaul is conducted between the different-cell sectors, which results in decreased backhaul latency of the cooperating information, and increased throughput of the user at sector edge and system performance.

摘要翻译： 目前的多基站合作通信技术只能固定地提供一种协作通信，这导致基站之间的数据交换量巨大，等待时间增加，或者无法获得最佳增益 。 为了解决这个问题，本发明提出了一种用于多扇区协作通信中的协作类型的交换技术。 主导该扇区的基站设备确定移动终端的一个或多个合作扇区，基于根据所述一个或多个合作扇区的信息，确定与所述一个或多个协作扇区协作提供的多扇区合作通信的类型 并且与所述一个或多个协作扇区协作并且为移动终端提供相应确定类型的多扇区协作通信。 根据本发明，在相同小区扇区之间进行完整信道信息和数据的高速交换，协同增益增加; 在不同小区扇区之间没有或几个数据回传，导致合作信息的回程延迟降低，并且在扇区边缘和系统性能上提高了用户的吞吐量。

公开(公告)号：US09083411B2

公开(公告)日：2015-07-14

申请号：US13521901

申请日：2010-01-13

申请人： Dong Li ,  Hao Liu ,  Hongwei Yang ,  Yang Song

发明人： Dong Li ,  Hao Liu ,  Hongwei Yang ,  Yang Song

IPC分类号： H04B17/00 ,  H04B7/06 ,  H04B7/02

CPC分类号： H04B7/0632 ,  H04B7/024 ,  H04B7/0626 ,  H04B7/0639

摘要： A mobile terminal is provided in the present invention, comprising: a channel state information feedback calculating unit configured to calculate a channel state information feedback between the mobile terminal and a serving cell of the mobile terminal and those between the mobile terminal and all cooperating cells; a channel quality information feedback calculating unit configured to calculate a channel quality information feedback for the serving cell of the mobile terminal; and a transmission unit configured to transmit the channel state information feedbacks and the channel quality information feedback to the serving cell. The present invention greatly improves the performance of a LTE-A system and greatly reduces feedback overhead. The present invention is a scalable feedback solution and may be flexibly applied to various coordinated multipoint transmission scenarios.

摘要翻译： 本发明提供一种移动终端，包括：信道状态信息反馈计算单元，被配置为计算移动终端与移动终端的服务小区之间的信道状态信息反馈以及移动终端与所有合作小区之间的信道状态信息反馈; 信道质量信息反馈计算单元，被配置为计算移动终端的服务小区的信道质量信息反馈; 以及发送单元，被配置为将信道状态信息反馈和信道质量信息反馈发送到服务小区。 本发明大大提高了LTE-A系统的性能，大大降低了反馈开销。 本发明是可扩展的反馈解决方案，并且可以灵活地应用于各种协调的多点传输场景。

公开(公告)号：US08982973B2

公开(公告)日：2015-03-17

申请号：US13639140

申请日：2010-04-06

申请人： Jinhui Chen ,  Dong Li ,  Hongwei Yang ,  Yang Song

发明人： Jinhui Chen ,  Dong Li ,  Hongwei Yang ,  Yang Song

IPC分类号： H04K1/10 ,  H04L27/28 ,  H04B7/06

CPC分类号： H04B7/0639 ,  H04B7/0663

摘要： The present invention provides a correlation-matrix feedback method and system for an antenna array. The method comprises steps of: selecting, at a receiving end, a codeword from a predetermined correlation-matrix codebook comprising a plurality of codewords according to a predetermined criterion to represent a correlation matrix to be fed back (300); and feeding back an index of the selected codeword in the predetermined correlation-matrix codebook to a transmitting end (302); wherein each codeword is a codeword matrix for approximating a correlation matrix of an antenna array at the transmitting end. According to the present invention, it is possible to take good advantage of the characteristics of closely-spaced ULA antennas and spatial correlation thereof, design a corresponding codebook for quantization and feedback, and reduce feedback overhead and computational complexity so as to improve the system performance of a spatial correlation aided system, such as a MIMO system.

摘要翻译： 本发明提供了一种用于天线阵列的相关矩阵反馈方法和系统。 该方法包括以下步骤：在接收端从根据预定标准的包括多个码字的预定相关矩阵码本中选择代码字，以表示要反馈的相关矩阵（300）; 并将所述预定相关矩阵码本中的所选码字的索引反馈给发送端（302）; 其中每个码字是用于近似发送端的天线阵列的相关矩阵的码字矩阵。 根据本发明，可以充分利用紧密隔开的ULA天线的特性及其空间相关性，设计相应的量化和反馈码本，并减少反馈开销和计算复杂度，从而提高系统性能 的空间相关辅助系统，如MIMO系统。