公开(公告)号：US06745005B1

公开(公告)日：2004-06-01

申请号：US09372706

申请日：1999-08-11

申请人： Hui-Ling Lou ,  Vijitha Weerackody

发明人： Hui-Ling Lou ,  Vijitha Weerackody

IPC分类号： H04B7185

CPC分类号： H04B7/18523 ,  H04B7/18517

摘要： A method and apparatus for reducing deep fading of signals in satellite-based communications systems employing terrestrial repeater stations by shifting the phase of the signals transmitted from each terrestrial repeater station by a different amount so that the signals are transmitted from each terrestrial repeater station and received at a receiver at different phases, thereby effectuating time diversity in such signals to reduce deep fading of the signals. The method and apparatus can be used in CDMA and OFDM systems.

摘要翻译： 一种用于通过将从每个地面中继站发送的信号的相位移位不同的量来减少使用地面中继站的基于卫星的通信系统中的信号的深度衰落的方法和装置，使得从每个地面中继站发送并接收信号 在不同相位的接收机处，从而实现这种信号中的时间分集以减少信号的深度衰落。 该方法和装置可用于CDMA和OFDM系统。

公开(公告)号：US06343103B1

公开(公告)日：2002-01-29

申请号：US09390386

申请日：1999-09-03

申请人： Hui-Ling Lou ,  Rudiger L. Urbanke

发明人： Hui-Ling Lou ,  Rudiger L. Urbanke

IPC分类号： H04L2302

CPC分类号： H03M13/6325 ,  H03M13/256 ,  H03M13/3961 ,  H03M13/41 ,  H03M13/4107 ,  H03M13/6502

摘要： A communication system decoder in which branch metrics are represented using linear distance. An illustrative embodiment for decoding a sequence of received symbols of a QPSK or QAM constellation includes a branch metric calculation unit, an add-compare-select unit, and a traceback unit. The branch metric unit computes branch metrics associated with transitions between states of a multi-stage trellis representation of a state machine. In accordance with the invention, each of the branch metrics correspond to a linear distance between a given one of the received symbols and its nearest codeword in a given stage of the trellis. The add-compare-select unit utilizes the branch metrics of a current stage, along with a previously-generated path metric, for comparison purposes in determining a survivor path and corresponding updated path metric for a current stage of the multi-stage trellis. The traceback unit utilizes the updated path metric to generate a corresponding decoded output. Advantageously, the add-compare-select unit of the decoder is configured such that it achieves a level of performance using the linear distance branch metrics which is equivalent to that achieved using squared distance branch metrics, while also substantially reducing the decoder complexity through the elimination of multiplication operations.

摘要翻译： 一种通信系统解码器，其中使用线性距离表示分支度量。 用于解码QPSK或QAM星座的接收符号序列的说明性实施例包括分支度量计算单元，加法比较选择单元和追溯单元。 分支度量单位计算与状态机的多级网格表示的状态之间的转变相关联的分支度量。 根据本发明，每个分支量度对应于给定的一个接收到的符号之间的线性距离及其在网格的给定阶段中的最近的码字。 加法比较选择单元利用当前阶段的分支度量以及先前生成的路径度量，用于在确定多级网格的当前阶段的幸存路径和对应的更新路径度量时进行比较。 回溯单元利用更新的路径度量来生成相应的解码输出。 有利地，解码器的加法比较选择单元被配置为使得其使用相当于使用平方距离分支量度所达到的线性距离分支量度来实现性能水平，同时还通过消除来显着降低解码器复杂度 的乘法运算。

公开(公告)号：US09219576B2

公开(公告)日：2015-12-22

申请号：US12876758

申请日：2010-09-07

申请人： Hongyuan Zhang ,  Yong Liu ,  Hui-Ling Lou

发明人： Hongyuan Zhang ,  Yong Liu ,  Hui-Ling Lou

IPC分类号： H04L1/00 ,  H04L25/03 ,  H04B7/02 ,  H04J11/00 ,  H04W16/28 ,  H04B7/06

CPC分类号： H04L1/0083 ,  H04B7/022 ,  H04B7/0617 ,  H04B7/0619 ,  H04J11/0053 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03783 ,  H04L2025/03815 ,  H04W16/28

摘要： A method for generating a beamforming training (BFT) unit includes generating a physical layer (PHY) preamble of the BFT unit and generating a first encoding block and a second encoding block using PHY data and MAC data, including at least one of i) using a number of padding bits in a PHY layer of the BFT unit such that the BFT unit consists of the PHY preamble, the first encoding block, and the second encoding block, and ii) generating a MAC protocol data unit (MPDU) having a length such that the BFT unit consists of the PHY preamble, the first encoding block, and the second encoding block.

摘要翻译： 一种用于生成波束形成训练（BFT）单元的方法包括：生成BFT单元的物理层（PHY）前导码并使用PHY数据和MAC数据生成第一编码块和第二编码块，包括以下各项中的至少一个：i）使用 BFT单元的PHY层中的多个填充比特，使得BFT单元由PHY前导码，第一编码块和第二编码块组成，以及ii）生成具有长度的MAC协议数据单元（MPDU） 使得BFT单元由PHY前导码，第一编码块和第二编码块组成。

公开(公告)号：US09185684B2

公开(公告)日：2015-11-10

申请号：US13605241

申请日：2012-09-06

申请人： Ying Cai ,  Jihwan P. Choi ,  Hui-Ling Lou ,  Vladan Petrovic

发明人： Ying Cai ,  Jihwan P. Choi ,  Hui-Ling Lou ,  Vladan Petrovic

IPC分类号： H04W72/02 ,  H04W72/04 ,  H04W88/06

CPC分类号： H04W72/0453 ,  H04W72/02 ,  H04W72/082 ,  H04W88/06

摘要： Apparatus having corresponding methods and computer-readable media comprise: a first transceiver comprising a controller configured to select one of a plurality of frequency regions, wherein bandwidths of the frequency regions are non-uniform, and wherein the first transceiver is configured to transceive, according to a first protocol, first wireless signals in the one of the plurality of frequency regions selected by the controller; an arbiter configured to select one or more frequency channels based on the one of the plurality of the frequency regions selected by the controller; and a second transceiver configured to transceive, according to a second protocol, second wireless signals only in the one or more frequency channels selected by the arbiter.

摘要翻译： 具有相应方法和计算机可读介质的装置包括：第一收发器，包括被配置为选择多个频率区域中的一个的控制器，其中频率区域的带宽是不均匀的，并且其中第一收发器被配置为收发 对于第一协议，由所述控制器选择的所述多个频率区域中的一个频率区域中的第一无线信号; 配置为基于由控制器选择的多个频率区域中的一个选择一个或多个频率信道的仲裁器; 以及第二收发机，其被配置为仅在所述仲裁器选择的所述一个或多个频率信道中收发根据第二协议的第二无线信号。

公开(公告)号：US09125216B1

公开(公告)日：2015-09-01

申请号：US13622916

申请日：2012-09-19

申请人： Jihwan P. Choi ,  Ying Cai ,  Hui-Ling Lou ,  Manyuan Shen

发明人： Jihwan P. Choi ,  Ying Cai ,  Hui-Ling Lou ,  Manyuan Shen

IPC分类号： H04B7/01 ,  H04W72/08 ,  H04W16/14

CPC分类号： H04W72/082 ,  H04W16/14 ,  H04W24/10 ,  H04W72/00 ,  H04W72/02

摘要： The present disclosure describes techniques for avoiding interference among multiple radios. In some aspects a communication channel of a first wireless interface of a device is determined to be adjacent to a frequency band in which a second wireless interface of the device is configured to communicate and channel measurement results are altered prior to transmission by the first wireless interface to a base station, effective to prevent the base station from selecting, for use by the first wireless interface, the channel adjacent to the frequency band of the second wireless interface.

摘要翻译： 本公开描述了用于避免多个无线电之间的干扰的技术。 在一些方面，设备的第一无线接口的通信信道被确定为与设备的第二无线接口被配置为通信的频带相邻，并且信道测量结果在第一无线接口发送之前被改变 到基站，有效地防止基站为第一无线接口使用与第二无线接口的频带相邻的信道。

公开(公告)号：US08914019B1

公开(公告)日：2014-12-16

申请号：US13553170

申请日：2012-07-19

申请人： Jihwan P. Choi ,  Ying Cai ,  Yakun Sun ,  Hui-Ling Lou

发明人： Jihwan P. Choi ,  Ying Cai ,  Yakun Sun ,  Hui-Ling Lou

IPC分类号： H04W24/00

CPC分类号： H04W72/1226 ,  H04L5/0091 ,  H04W72/048 ,  H04W72/082 ,  H04W72/1215 ,  H04W88/06

摘要： Apparatus having corresponding methods and computer-readable media comprise: a Mobile Wireless Standards (MWS) transceiver configured to transceive MWS signals in accordance with a schedule, wherein the schedule is based on link status reports transmitted by the MWS transceiver as part of the MWS signals; one or more Industrial, Scientific and Medical (ISM) band transceivers, wherein each ISM band transceiver is configured to transceive ISM band signals; and an arbiter configured to modify the link status reports, prior to transmission of the link status reports, based on at least one of i) an expected transmission of the ISM band signals by one of the ISM band transceivers, and ii) an expected reception of the ISM band signals by one of the ISM band transceivers.

摘要翻译： 具有相应方法和计算机可读介质的装置包括：移动无线标准（MWS）收发机，其被配置为根据时间表收发MWS信号，其中所述调度基于由MWS收发机发送的作为MWS信号的一部分的链路状态报告 ; 一个或多个工业，科学和医疗（ISM）频带收发器，其中每个ISM频带收发机被配置为收发ISM频带信号; 以及仲裁器，其被配置为在传输所述链路状态报告之前，基于以下至少一个来修改所述链路状态报告：i）所述ISM频带收发机之一的ISM频带信号的预期传输，以及ii）预期接收 的ISM频带收发器之一的ISM频带信号。

公开(公告)号：US08867635B1

公开(公告)日：2014-10-21

申请号：US13323781

申请日：2011-12-12

申请人： Jungwon Lee ,  Rohit U. Nabar ,  Jihwan P. Choi ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Rohit U. Nabar ,  Jihwan P. Choi ,  Hui-Ling Lou

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04B7/0682 ,  H04B7/0413 ,  H04B7/0465

摘要： A method for determining a phase of each of a plurality of transmitting antennas in a multiple input and multiple output (MIMO) communication system includes: calculating, for first and second ones of the plurality of transmitting antennas, a value based on first and second groups of channel gains, the first group including channel gains between the first transmitting antenna and each of a plurality of receiving antennas, the second group including channel gains between the second transmitting antenna and each of the plurality of receiving antennas; and determining the phase of each of the plurality of transmitting antennas based on at least the value.

摘要翻译： 一种用于确定多输入多输出（MIMO）通信系统中的多个发射天线中的每一个的相位的方法，包括：针对所述多个发射天线中的第一和第二发射天线的第一和第二发射天线，基于第一和第二组 所述第一组包括所述第一发射天线与所述多个接收天线中的每一个之间的信道增益，所述第二组包括所述第二发射天线与所述多个接收天线中的每一个之间的信道增益; 以及至少基于所述值确定所述多个发射天线中的每一个的相位。

公开(公告)号：US08774289B1

公开(公告)日：2014-07-08

申请号：US13355349

申请日：2012-01-20

申请人： Hui-Ling Lou ,  Dimitrios-Alexandros Toumpakaris ,  Jungwon Lee

发明人： Hui-Ling Lou ,  Dimitrios-Alexandros Toumpakaris ,  Jungwon Lee

IPC分类号： H04L25/00

CPC分类号： H03M7/46 ,  H04L1/0054 ,  H04L1/006 ,  H04L1/0067 ,  H04L1/0071 ,  H04L27/34

摘要： A transmitter can include an encoder configured to encode a data sequence based on a first encoding rate to generate a first encoded bit stream having first bits with at least one first repeated bit and encode the data sequence based on a second, different encoding rate to generate a second encoded bit stream having second bits with at least one second repeated bit, where the first and second encoded bit streams each fully represent the data sequence. A receiver can include circuitry configured to produce identified repeated bits by identifying a repeated bit in the first encoded bit stream and a repeated bit in the second encoded bit stream that correspond to a same bit position, combine the first encoded bit stream and the second encoded bit stream including the identified repeated bits to generate a combined bit stream, and decode the combined bit stream.

摘要翻译： 发射机可以包括编码器，其被配置为基于第一编码速率对数据序列进行编码，以产生具有至少一个第一重复比特的第一比特的第一编码比特流，并且基于第二不同编码率对该数据序列进行编码以产生 第二编码比特流，具有具有至少一个第二重复比特的第二比特，其中第一和第二编码比特流各自完全表示数据序列。 接收机可以包括被配置为通过识别第一编码比特流中的重复比特和对应于相同比特位置的第二编码比特流中的重复比特来产生识别的重复比特的电路，组合第一编码比特流和第二编码比特流 包括所识别的重复比特以产生组合比特流，并对组合的比特流进行解码。

公开(公告)号：US08761302B1

公开(公告)日：2014-06-24

申请号：US13902961

申请日：2013-05-27

申请人： Jungwon Lee ,  Jihwan P. Choi ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Yakun Sun

发明人： Jungwon Lee ,  Jihwan P. Choi ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Yakun Sun

IPC分类号： H04L27/00

CPC分类号： H04L27/2627 ,  H04B7/0413 ,  H04B7/0669 ,  H04B7/0671 ,  H04L1/0625 ,  H04L5/0023 ,  H04L5/0087 ,  H04L25/0204 ,  H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03426

摘要： A plurality of diagonal matrices Ci is determined, where the plurality of diagonal matrices Ci is for modifying a plurality of transmit signals to be transmitted via a plurality of transmit antennas, each diagonal matrix Ci for modifying an i-th block of sub-carriers, adjacent in frequency, in the plurality of transmit signals. The plurality of diagonal matrices Ci is used to modify the plurality of transmit signals to implement transmit diversity.

摘要翻译： 确定多个对角矩阵Ci，其中多个对角矩阵Ci用于修改要经由多个发射天线发射的多个发射信号，用于修改第i个子载波块的每个对角矩阵Ci， 频率相邻的多个发送信号。 多个对角矩阵Ci用于修改多个发射信号以实现发射分集。

公开(公告)号：US08699644B1

公开(公告)日：2014-04-15

申请号：US13282952

申请日：2011-10-27

申请人： Yakun Sun ,  Jiwoong Choi ,  Hui-Ling Lou ,  Rapheal Cendrillon

发明人： Yakun Sun ,  Jiwoong Choi ,  Hui-Ling Lou ,  Rapheal Cendrillon

IPC分类号： H04B1/10

CPC分类号： H04L25/0206 ,  H04L25/0204 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0228 ,  H04L27/2647 ,  H04L27/2649 ,  H04L27/38 ,  H04L2025/03535

摘要： Systems, methods, and other embodiments associated with adaptive low-complexity channel estimation are illustrated. In one embodiment a device includes a receiver configured to receive an orthogonal frequency-division multiplexed (OFDM) signal. The device also includes a controller configured to control a switch to select between processing paths based, at least in part, on the channel conditions of the OFDM signal. The processing paths selectable by the switch include a first processing path and a second processing path.

摘要翻译： 示出了与自适应低复杂度信道估计相关联的系统，方法和其他实施例。 在一个实施例中，设备包括被配置为接收正交频分复用（OFDM）信号的接收机。 该设备还包括控制器，其被配置为至少部分地基于OFDM信号的信道条件来控制交换机在处理路径之间进行选择。 由开关可选择的处理路径包括第一处理路径和第二处理路径。