公开(公告)号：US20120275496A1

公开(公告)日：2012-11-01

申请号：US13532267

申请日：2012-06-25

Applicant: Afshin Haghighat ,  Yingxue Li

Inventor： Afshin Haghighat ,  Yingxue Li

IPC: H04L27/28 ,  H04B1/38

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：US07869536B2

公开(公告)日：2011-01-11

申请号：US11753121

申请日：2007-05-24

Applicant: Yingxue Li ,  Robert Lind Olesen

Inventor： Yingxue Li ,  Robert Lind Olesen

IPC: H04L1/02

CPC classification number: H04B7/0413 ,  H04L1/20 ,  H04L25/0204 ,  H04L25/0242 ,  H04L25/0256 ,  H04L25/067 ,  H04L2025/03414 ,  H04L2025/0342 ,  H04L2025/03426

Abstract: A multiple-input multiple-output (MIMO) receiver includes a MIMO decoder, a pre-scaling unit, a demapper, and a post-scaling unit. The MIMO decoder performs a MIMO decoding on received signals to decouple a plurality of symbols transmitted via a plurality of data streams. Both pre-demapping scaling and post-demapping scaling are performed to improve the performance of the receiver. A pre-scaling coefficient is applied to the symbols by the pre-scaling unit to generate pre-scaled symbols. The pre-scaled symbols are converted to soft bits by the demapper. The post-scaling unit then applies a post-scaling coefficient to the soft bits. The post-scaling coefficient is a signal-to-interference and noise ratio (SINR). Cross interference is taken into account in post-demapping scaling to obtain more accurate soft bits for subsequent decoding. The present invention is applicable to both a multi-carrier system, (such as orthogonal frequency division multiplexing (OFDM)), and a single carrier system.

Abstract translation: 多输入多输出（MIMO）接收机包括MIMO解码器，预缩放单元，解映射器和后定标单元。 MIMO解码器对接收到的信号执行MIMO解码以去耦经由多个数据流发送的多个符号。 执行预映射缩放和后解映射缩放以提高接收机的性能。 通过预缩放单元将预缩放系数应用于符号以生成预缩放符号。 预分解符号由解映射器转换为软位。 然后，缩放后单元将比例缩放系数应用于软比特。 后缩放系数是信噪比（SINR）。 在后解映射缩放中考虑到交叉干扰，以获得更准确的软比特用于后续解码。 本发明适用于多载波系统（例如正交频分复用（OFDM））和单载波系统。

公开(公告)号：US07796702B2

公开(公告)日：2010-09-14

申请号：US11459757

申请日：2006-07-25

Applicant: Yingxue Li

Inventor： Yingxue Li

IPC: H04B7/02 ,  H04L1/02

CPC classification number: H04L1/0618 ,  H04L25/03184 ,  H04L25/03292

Abstract: A wireless communications device includes an encoder having an input for receiving an input symbol, and generates based upon the input symbol a channel symbol and an antenna control symbol. At least one transmitter is coupled to the encoder for receiving the channel symbol. An antenna switch is coupled to the encoder for receiving the antenna control symbol, and to the at least one transmitter for receiving the channel symbol to be transmitted. An antenna array is coupled to the antenna switch and includes N antenna elements, with N≧2. The antenna switch selects less than N antenna elements based upon the antenna control symbol for transmitting the channel symbol.

Abstract translation: 无线通信设备包括具有用于接收输入符号的输入的编码器，并且基于输入符号生成信道符号和天线控制符号。 至少一个发射机耦合到编码器以接收信道符号。 天线开关耦合到编码器，用于接收天线控制符号，并耦合到至少一个发射机，用于接收待传输的信道符号。 天线阵列耦合到天线开关，并包括N≥2的N个天线元件。 天线开关基于用于发送信道符号的天线控制符号来选择少于N个天线元件。

公开(公告)号：US20080279263A1

公开(公告)日：2008-11-13

申请号：US12117373

申请日：2008-05-08

Applicant: Afshin Haghighat ,  Yingxue Li

Inventor： Afshin Haghighat ,  Yingxue Li

IPC: H04B1/38 ,  H04B1/10 ,  H04L27/00

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：US07430430B2

公开(公告)日：2008-09-30

申请号：US10737012

申请日：2003-12-16

Applicant: Yingxue Li ,  William Reinisch ,  Haim Harel

Inventor： Yingxue Li ,  William Reinisch ,  Haim Harel

IPC: H04B7/005

CPC classification number: H04W52/26 ,  H04B7/0613 ,  H04B7/0857 ,  H04B17/309 ,  H04W52/143 ,  H04W52/146 ,  H04W52/241 ,  H04W52/247 ,  H04W52/34

Abstract: Adjusting a signal includes receiving signals and quality indicators at an adjuster. The quality indicators include as least one of a power control group boundary signal, a power control group index, a PN code per active finger, a reverse power control bit per active finger, an energy per chip over noise power spectral density ratio per active finger, channel estimates I/Q per active finger, an energy per bit over noise power spectral density, a transmit AGC signal, a total receive power, and any combination of the preceding. A signal adjustment is calculated according to the quality indicators, and the signals are adjusted according to the signal adjustment to yield adjusted signals.

Abstract translation: 调整信号包括调节器处的接收信号和质量指示器。 质量指标包括功率控制组边界信号，功率控制组索引，每个活动手指的PN码，每个活动手指的反向功率控制位，每个有效手指的每芯片超过噪声功率谱密度比的能量中的至少一个 ，每个活动手指的信道估计I / Q，每比特超过噪声功率谱密度的能量，发射AGC信号，总接收功率以及前述的任何组合。 根据质量指标计算信号调整，根据信号调整信号进行调整，以产生调整后的信号。

公开(公告)号：US07428408B2

公开(公告)日：2008-09-23

申请号：US11228816

申请日：2005-09-16

Applicant: Inhyok Cha ,  Yingxue Li

Inventor： Inhyok Cha ,  Yingxue Li

IPC: H04B1/06

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择的发射机接收包括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。

公开(公告)号：US20080056396A1

公开(公告)日：2008-03-06

申请号：US11848445

申请日：2007-08-31

Applicant: Yingxue Li

Inventor： Yingxue Li

IPC: H04L27/28

CPC classification number: H04L25/0242 ,  H04L25/03216

Abstract: A method and apparatus for QR decomposition-based multiple-input multiple-output (MIMO) detection and soft bit generation are disclosed. QR decomposition is performed on the MIMO channel matrix H to compute a Q matrix and an R matrix such that H=QR. The R matrix, or diagonal elements of the R matrix, is stored in a memory. An {tilde over (R)} matrix is computed by dividing elements in each row of the R matrix with a corresponding diagonal element of the R matrix. A {tilde over (Y)} vector is computed by dividing each element of the received symbol vector Y with a corresponding diagonal element of the R matrix. A tree search process is performed using the {tilde over (R)} matrix and the {tilde over (Y)} vector to generate an approximate maximum likelihood (ML) estimate of transmitted symbols.

Abstract translation: 公开了一种用于基于QR分解的多输入多输出（MIMO）检测和软比特生成的方法和装置。 对MIMO信道矩阵H执行QR分解以计算Q矩阵和使得H = QR的R矩阵。 R矩阵或R矩阵的对角元素存储在存储器中。 通过将R矩阵的每行中的元素与R矩阵的对应对角元素分开来计算R矩阵。 通过将接收到的符号向量Y的每个元素与R矩阵的对应对角线元素相除来计算Y向量。 使用R矩阵和Y向量执行树搜索处理，以生成发送符号的近似最大似然（ML）估计。

公开(公告)号：US20070280387A1

公开(公告)日：2007-12-06

申请号：US11753121

申请日：2007-05-24

Applicant: Yingxue Li ,  Robert Lind Olesen

Inventor： Yingxue Li ,  Robert Lind Olesen

IPC: H04L1/02

CPC classification number: H04B7/0413 ,  H04L1/20 ,  H04L25/0204 ,  H04L25/0242 ,  H04L25/0256 ,  H04L25/067 ,  H04L2025/03414 ,  H04L2025/0342 ,  H04L2025/03426

Abstract: A multiple-input multiple-output (MIMO) receiver includes a MIMO decoder, a pre-scaling unit, a demapper, and a post-scaling unit. The MIMO decoder performs a MIMO decoding on received signals to decouple a plurality of symbols transmitted via a plurality of data streams. Both pre-demapping scaling and post-demapping scaling are performed to improve the performance of the receiver. A pre-scaling coefficient is applied to the symbols by the pre-scaling unit to generate pre-scaled symbols. The pre-scaled symbols are converted to soft bits by the demapper. The post-scaling unit then applies a post-scaling coefficient to the soft bits. The post-scaling coefficient is a signal-to-interference and noise ratio (SINR). Cross interference is taken into account in post-demapping scaling to obtain more accurate soft bits for subsequent decoding. The present invention is applicable to both a multi-carrier system, (such as orthogonal frequency division multiplexing (OFDM)), and a single carrier system.

Abstract translation: 多输入多输出（MIMO）接收机包括MIMO解码器，预缩放单元，解映射器和后定标单元。 MIMO解码器对接收到的信号执行MIMO解码以去耦经由多个数据流发送的多个符号。 执行预映射缩放和后解映射缩放以提高接收机的性能。 通过预缩放单元将预缩放系数应用于符号以生成预缩放符号。 预分解符号由解映射器转换为软位。 然后，缩放后单元将比例缩放系数应用于软比特。 后缩放系数是信噪比（SINR）。 在后解映射缩放中考虑到交叉干扰，以获得更准确的软比特用于后续解码。 本发明适用于多载波系统（例如正交频分复用（OFDM））和单载波系统。

公开(公告)号：US20070165736A1

公开(公告)日：2007-07-19

申请号：US11377152

申请日：2006-03-16

Applicant: Jin Wang ,  Arty Chandra ,  Inhyok Cha ,  Yingxue Li

Inventor： Jin Wang ,  Arty Chandra ,  Inhyok Cha ,  Yingxue Li

IPC: H04L1/02

CPC classification number: H04B7/0695 ,  H04B7/088 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025

Abstract: A method and apparatus for selecting a beam combination of beam switched antennas in a multiple-input multiple-output (MIMO) wireless communication system including a first node and a second node. The first node sends a plurality of modulation and coding scheme (MCS) requests to the second node. Each of the plurality of MCS requests is sent using a particular beam combination. The second node receives the MCS requests and generates MCS feedback signals for each of the MCS requests. Each MCS feedback signal includes an MCS recommendation for the particular beam. The first node selects a beam combination for communicating with the second node based on the MCS recommendations.

Abstract translation: 一种用于在包括第一节点和第二节点的多输入多输出（MIMO）无线通信系统中选择波束切换天线的波束组合的方法和装置。 第一节点向第二节点发送多个调制和编码方案（MCS）请求。 使用特定的波束组合发送多个MCS请求中的每一个。 第二节点接收MCS请求，并为每个MCS请求生成MCS反馈信号。 每个MCS反馈信号包括针对特定波束的MCS推荐。 第一节点基于MCS建议选择用于与第二节点进行通信的波束组合。

公开(公告)号：US20070160116A1

公开(公告)日：2007-07-12

申请号：US11711630

申请日：2007-02-28

Applicant: Haim Harel ,  Yingxue Li ,  Alexander Segalovitz

Inventor： Haim Harel ,  Yingxue Li ,  Alexander Segalovitz

IPC: H04B1/00 ,  H04L1/02

CPC classification number: H04W52/221 ,  H04B7/0623 ,  H04B7/0632 ,  H04W52/16 ,  H04W52/34 ,  H04W52/42

Abstract: Communication is performed for a first communication device having a set of antenna elements. A quality-indication signal is received from a second communication device (e.g., a basestation). A complex weighting is calculated based on the quality-indication signal. A pre-transmission signal is modified based on the complex weighting to produce a set of modified-pre-transmission signals. Each modified pre-transmission signal from the set of modified-pre-transmission signals is uniquely associated with an antenna element from the set of antenna elements. The set of modified-pre-transmission signals is sent from the set of antenna elements to produce a transmitted signal. The complex weighting is associated with a total power of the transmitted power and at least one from a phase rotation and a power ratio associated with each antenna element from the set of antenna elements. For example, in CDMA based systems, a fast feedback from the basestation—the power control indication—can be used by a subscriber communication device for this transmission diversity method in such a way that provides the desired signal quality at the basestation, without necessarily responding to fading nulls by mobile unit power output increase, but rather, by manipulating the weights of the mobile transmitter antenna array. Thus, a significant reduction in average and peak mobile power level is achieved, enhancing network capacity, battery life, and radiation hazards.

Abstract translation: 对具有一组天线元件的第一通信设备执行通信。 从第二通信设备（例如，基站）接收质量指示信号。 基于质量指示信号计算复数加权。 基于复加权来修改预传输信号以产生一组经修改的预传输信号。 来自修改后的预传输信号的每个经修改的预发射信号与天线元件集合中的天线元件唯一地相关联。 经修改的预传输信号的集合从天线元件组发送以产生发射信号。 复加权与发射功率的总功率以及与来自该组天线元件的每个天线元件相关联的相位旋转和功率比中的至少一个相关联。 例如，在基于CDMA的系统中，来自基站的快速反馈（功率控制指示）可以由用户通信设备用于该传输分集方法，以便在基站提供期望的信号质量，而不必响应 通过移动单元功率输出增加而衰落零点，而是通过操纵移动发射机天线阵列的权重。 因此，实现平均和峰值移动功率水平的显着降低，增强网络容量，电池寿命和辐射危害。