公开(公告)号：US08670498B2

公开(公告)日：2014-03-11

申请号：US13532267

申请日：2012-06-25

Applicant: Afshin Haghighat ,  Yingxue Li

Inventor： Afshin Haghighat ,  Yingxue Li

IPC: H04B7/02

CPC classification number: H04L27/28 ,  H04B1/38 ,  H04L1/0606 ,  H04L5/0023

Abstract: A method and apparatus of reducing interference in space frequency block coding (SFBC) communication are disclosed. SFBC encoding is performed on at least one pair of symbols. The symbols are assigned to subcarriers in accordance with a frequency assignment pattern assigned to a cell. Different frequency assignment patterns are assigned to neighboring cells. Cells in the network may be divided into a plurality of groups and a different frequency assignment pattern may be assigned to each group of cells. The frequency assignment pattern may be defined such that subcarriers mapped to a pair of symbols in one cell are interlaced to subcarriers mapped to a pair of symbols in a neighbor cell. Alternatively, the frequency assignment pattern may be defined such that subcarriers mapped to a pair of symbols in one cell are shifted in a neighbor cell.

Abstract translation: 公开了减少空间频率块编码（SFBC）通信中的干扰的方法和装置。 对至少一对符号执行SFBC编码。 根据分配给单元的频率分配模式，将符号分配给子载波。 不同的频率分配模式被分配给相邻小区。 网络中的小区可以被划分成多个组，并且可以将不同的频率分配模式分配给每组小区。 可以定义频率分配模式，使得映射到一个小区中的一对符号的副载波被隔行扫描到映射到相邻小区中的一对符号的副载波。 或者，可以定义频率分配模式，使得映射到一个小区中的一对符号的副载波在相邻小区中移位。

公开(公告)号：US08290079B2

公开(公告)日：2012-10-16

申请号：US12106068

申请日：2008-04-18

Applicant: Yingxue Li

Inventor： Yingxue Li

IPC: H04B7/02 ,  H04L1/02

CPC classification number: H04L25/03343 ,  H04B7/0417 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0654 ,  H04L27/261 ,  H04L2025/03426

Abstract: A method and apparatus for precoding validation in wireless communications with reduced error probability is disclosed. Error probability is reduced by applying phase rotations to precoding matrices, dedicated pilot symbols, or both to maximize a minimum pairwise distance.

Abstract translation: 公开了一种用于在具有降低的错误概率的无线通信中预编码验证的方法和装置。 通过将相位旋转应用于预编码矩阵，专用导频符号或两者来减小最大化最小成对距离的误差概率。

公开(公告)号：US08059610B2

公开(公告)日：2011-11-15

申请号：US11736847

申请日：2007-04-18

Applicant: Yingxue Li ,  Sung-Hyuk Shin ,  Guodong Zhang ,  Donald M. Grieco

Inventor： Yingxue Li ,  Sung-Hyuk Shin ,  Guodong Zhang ,  Donald M. Grieco

IPC: H04W4/00

CPC classification number: H04L1/1816 ,  H04L1/0002 ,  H04L1/0625 ,  H04L1/0643 ,  H04L1/0662 ,  H04L1/0668 ,  H04L1/1812 ,  H04L1/1819 ,  H04L1/1845 ,  H04L25/0204

Abstract: A method and apparatus for implementing hybrid automatic repeat request (H-ARQ) in a multiple-input multiple-output (MIMO) wireless communication system are disclosed. A transmitter transmits at least two data packets via two or more antennas. If at least one of the data packets is not successfully transmitted, the transmitter retransmits the data packets while rearranging the data packets in an orthogonal spreading manner. Alternatively, the transmitter may retransmit only the unsuccessfully transmitted data packet along with a new data packet which replaces a successfully transmitted data packet. The unsuccessfully transmitted data packet may simply be repeated without changing its format. When only the unsuccessfully transmitted data packet is retransmitted along with the new data packet, the transmissions may be combined to recover the retransmitted data packet and the new data packet simultaneously.

Abstract translation: 公开了一种用于在多输入多输出（MIMO）无线通信系统中实现混合自动重传请求（H-ARQ）的方法和装置。 发射机经由两个或更多个天线发送至少两个数据分组。 如果数据分组中的至少一个没有成功发送，则在以正交扩频方式重排数据分组的同时，发射机重发数据分组。 或者，发射机可以仅重新发送未成功发送的数据分组以及替换成功发送的数据分组的新数据分组。 可以简单地重复未成功发送的数据分组而不改变其格式。 当只有未成功发送的数据分组与新的数据分组一起重传时，可以组合传输以同时恢复重传的数据分组和新的数据分组。

公开(公告)号：US07764707B2

公开(公告)日：2010-07-27

申请号：US11686994

申请日：2007-03-16

Applicant: Yingxue Li

Inventor： Yingxue Li

IPC: H04L1/18

CPC classification number: H04L27/34 ,  H04L1/0015 ,  H04L1/1812 ,  H04L1/1893 ,  H04L27/366

Abstract: A simplified QAM signal constellation symbol-wise remapping scheme for data packet retransmissions to improve performance at a high coding rate. The simplified QAM signal constellation symbol-wise remapping scheme takes advantage of the separate I and Q labeling bits in a QAM signal to reduce the complexity of a receiving node. A method for adaptive switching between bit-wise and symbol-wise constellation remapping for data packet transmissions according to channel coding rate to achieve optimum performance across the range of channel coding rates.

Abstract translation: 用于数据分组重传的简化的QAM信号星座符号重新映射方案，以在高编码率下提高性能。 简化的QAM信号星座符号重新映射方案利用QAM信号中的分离的I和Q标记位来降低接收节点的复杂度。 一种用于根据信道编码速率的用于数据分组传输的逐位和符号方式星座重映射之间的自适应切换的方法，以在信道编码率的范围内实现最佳性能。

公开(公告)号：US07558591B2

公开(公告)日：2009-07-07

申请号：US10963046

申请日：2004-10-12

Applicant: Qing Li ,  William Reinisch ,  Yingxue Li ,  Haim Harel

Inventor： Qing Li ,  William Reinisch ,  Yingxue Li ,  Haim Harel

IPC: H04B7/00 ,  H04Q7/20

CPC classification number: H04W52/54

Abstract: Determining a power control group boundary includes receiving a plurality of samples having power control groups, where each power control group corresponds to a time period. The following are repeated for a predetermined number of iterations: a window is set at a point of a sample; a number of power control bits within the window at the point is determined; and the window is moved to a point of a next sample. A point at which the window has the largest number of power control bits is identified. A power control group boundary is determined in accordance with the window at the identified point.

Abstract translation: 确定功率控制组边界包括接收具有功率控制组的多个样本，其中每个功率控制组对应于时间段。 对于预定次数的迭代重复以下操作：在样本点设置窗口; 确定该点内窗口内的多个功率控制位; 并将窗口移动到下一个样本的点。 识别窗口具有最大数量的功率控制位的点。 根据识别点处的窗口确定功率控制组边界。

公开(公告)号：US20090046801A1

公开(公告)日：2009-02-19

申请号：US12190296

申请日：2008-08-12

Applicant: Kyle Jung-Lin Pan ,  Erdem Bala ,  Yingxue Li ,  Donald M. Grieco ,  Robert L. Olesen

Inventor： Kyle Jung-Lin Pan ,  Erdem Bala ,  Yingxue Li ,  Donald M. Grieco ,  Robert L. Olesen

IPC: H04L27/28

CPC classification number: H04B7/0452 ,  H04B7/0632 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0645 ,  H04B7/0697

Abstract: A wireless communication method and apparatus for creating a codebook in a multiple input/multiple output (MIMO) wireless communication system are disclosed. The method includes adapting a single user codebook, wherein the single user codebook comprises a plurality single user beamforming vectors, into a multi-user codebook, wherein the multi-user codebook comprises a plurality of multi-user beamforming vectors. The method further includes grouping the codebook into a plurality of unitary matrices, selecting a plurality of beamforming vectors from the plurality of unitary matrices, forming a rank specific code-book from the beamforming vectors and the unitary matrices, and selecting a subset of a total number of pairs to form the plurality of unitary matrices.

Abstract translation: 公开了一种用于在多输入/多输出（MIMO）无线通信系统中创建码本的无线通信方法和装置。 该方法包括使单用户码本将单用户码本包括多个单用户波束形成向量，并将其转换成多用户码本，其中该多用户码本包括多个多用户波束形成向量。 该方法还包括将码本分组为多个酉矩阵，从多个单一矩阵中选择多个波束成形向量，从波束形成向量和酉矩阵形成等级特定码本，并选择总数的子集 成对数以形成多个单一矩阵。

公开(公告)号：US07418067B1

公开(公告)日：2008-08-26

申请号：US10824179

申请日：2004-04-14

Applicant: Yingxue Li

Inventor： Yingxue Li

IPC: H04B7/10

CPC classification number: H04B7/084

Abstract: Processing diversity signals includes receiving diversity signals at a number of antennas. The diversity signals have communicated information, and the antennas are associated with channel paths. A phase of at least one diversity signal is adjusted. The diversity signals are combined to form a combined signal. The combined signal is processed to yield the communicated information. A combined complex channel gain estimate is determined from the combined signal. An individual complex channel gain estimate is calculated for each antenna from the combined complex channel gain estimate. Phase adjustments associated with the channel paths are established according to individual complex channel gain estimates. The phase adjustments are applied to next diversity signals having next communicated information. The next diversity signals are processed to yield the next communicated information.

Abstract translation: 处理分集信号包括在多个天线处接收分集信号。 分集信号已传送信息，并且天线与信道路径相关联。 调整至少一个分集信号的相位。 分集信号被组合以形成组合信号。 处理组合信号以产生所传送的信息。 从组合信号确定组合的复信道增益估计。 根据组合的复信道增益估计对每个天线计算单个复信道增益估计。 根据各个复杂的信道增益估计建立与信道路径相关的相位调整。 相位调整被应用于具有下一个传送信息的下一个分集信号。 处理下一个分集信号以产生下一个传送的信息。

公开(公告)号：US20080002627A1

公开(公告)日：2008-01-03

申请号：US11753115

申请日：2007-05-24

Applicant: Inhyok Cha ,  Keith Baldwin ,  Yingxue Li

Inventor： Inhyok Cha ,  Keith Baldwin ,  Yingxue Li

IPC: H04Q7/00

CPC classification number: H01Q3/2611 ,  H04L1/1887 ,  H04W84/12 ,  H04W88/02

Abstract: A client station in a wireless local area network (WLAN) communication system includes a beam commutation algorithm and a smart antenna responsive to the beam commutation algorithm for selecting one of a plurality of directional antenna beams. The smart antenna is configured as a virtual omni-directional antenna by using a commutation of switched directional antenna beams. A switched directional antenna system that performs a commutation sequencing can be blind to environmental conditions and changes.

Abstract translation: 无线局域网（WLAN）通信系统中的客户站包括波束换向算法和响应于波束换向算法的智能天线，用于选择多个定向天线波束中的一个。 通过使用切换的定向天线波束的换向将智能天线配置为虚拟全向天线。 执行换向排序的开关定向天线系统可能对环境条件和变化无视。

公开(公告)号：US20060084388A1

公开(公告)日：2006-04-20

申请号：US10963046

申请日：2004-10-12

Applicant: Qing Li ,  William Reinisch ,  Yingxue Li ,  Haim Harel

Inventor： Qing Li ,  William Reinisch ,  Yingxue Li ,  Haim Harel

IPC: H04B7/00

CPC classification number: H04W52/54

Abstract: Determining a power control group boundary includes receiving a plurality of samples having power control groups, where each power control group corresponds to a time period. The following are repeated for a predetermined number of iterations: a window is set at a point of a sample; a number of power control bits within the window at the point is determined; and the window is moved to a point of a next sample. A point at which the window has the largest number of power control bits is identified. A power control group boundary is determined in accordance with the window at the identified point.

公开(公告)号：US20060079220A1

公开(公告)日：2006-04-13

申请号：US11228816

申请日：2005-09-16

Applicant: Inhyok Cha ,  Yingxue Li

Inventor： Inhyok Cha ,  Yingxue Li

IPC: H04Q7/20

CPC classification number: H04W16/28 ,  H04B7/0695 ,  H04B7/082 ,  H04W76/10 ,  H04W84/12

Abstract: A communications device with a switched beam antenna operates in a wireless local area network (WLAN) that includes a plurality of transmitters. The switched beam antenna generates a plurality of antenna beams. A method for operating the communications device includes receiving signals from the plurality of transmitters operating within the WLAN, identifying the received signals comprising medium access control (MAC) information, and determining a quality metric for each received signal comprising MAC information. A transmitter is selected based on the quality metrics. The antenna beams are scanned for receiving from the selected transmitter the signals comprising MAC information. A quality metric associated with each scanned antenna beam is determined. One of the scanned antenna beams is then selected for communicating with the selected transmitter based on the quality metrics.

Abstract translation: 具有切换波束天线的通信设备在包括多个发射机的无线局域网（WLAN）中工作。 切换波束天线产生多个天线波束。 用于操作通信设备的方法包括从在WLAN内操作的多个发射机接收信号，识别包括媒体接入控制（MAC）信息的接收信号，以及确定包括MAC信息的每个接收信号的质量度量。 基于质量度量来选择发射机。 扫描天线波束以从所选发射机接收包括MAC信息的信号。 确定与每个扫描天线波束相关联的质量度量。 然后选择扫描的天线波束之一用于基于质量度量与所选择的发射机进行通信。