公开(公告)号：US08498195B1

公开(公告)日：2013-07-30

申请号：US12059945

申请日：2008-03-31

申请人： Jungwon Lee ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Hui-Ling Lou

IPC分类号： H04J11/00

CPC分类号： H04B7/0623 ,  H04L1/0643 ,  H04L1/1812 ,  H04L1/1893

摘要： Systems and methods are provided for employing a HARQ retransmission scheme in a time invariant MIMO transmission channel with two inputs. During odd-numbered transmission attempts of information bearing signal s, the original signal s is sent. During even-numbered transmission attempts, a signal {hacek over (s)} that is different from but represents the same information as s is sent. By alternating between two different signals during retransmission, diversity gain is introduced. Information bearing signals s and {hacek over (s)} may also be subjected to precoding before transmission. The result of precoding is a channel that effectively changes with time. A receiver that operates using this retransmission scheme may use the information from some or all of the transmission attempts. The receiver may include a pre-processor for space-time codes that effectively converts {hacek over (s)} into an s representation.

摘要翻译： 提供了在具有两个输入的时不变MIMO传输信道中采用HARQ重传方案的系统和方法。 在信号承载信号s的奇数传输尝试期间，发送原始信号s。 在偶数传输尝试期间，发送不同于但表示与s相同信息的信号{hacek over（s）}。 通过在重传期间在两个不同的信号之间交替，引入分集增益。 信息承载信号s和{hacek over（s）}也可以在传输之前进行预编码。 预编码的结果是随时间有效变化的通道。 使用该重传方案操作的接收机可以使用来自部分或全部传输尝试的信息。 接收机可以包括用于将{hacek over（s）}有效地转换为s表示的时空码的预处理器。

公开(公告)号：US08428169B1

公开(公告)日：2013-04-23

申请号：US12510037

申请日：2009-07-27

申请人： Jungwon Lee ,  Jiwoong Choi ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Jiwoong Choi ,  Hui-Ling Lou

IPC分类号： H04B7/02

CPC分类号： H04L25/03891 ,  H04B7/0413 ,  H04B7/0854 ,  H04L25/067

摘要： Systems and methods for reconstructing digital information in a multiple-input receiver from signals transmitted by a multiple-output transmitter, in a multiple-input multiple-output (MIMO) communications channel are provided. A plurality of signal streams are obtained from a plurality of transmitted signals and a first candidate signal value is selected for each of the plurality of signal streams. A plurality of additional candidate signal values are also selected for each of the plurality of signal streams in response to selecting the first candidate signal value. A log-likelihood ratio (LLR) is computed from the plurality of signal streams based on all of the selected candidate signal values. Digital information may then be estimated based on the computed LLR.

摘要翻译： 提供了在多输入多输出（MIMO）通信信道中由多输出发射机发送的信号重建多输入接收机中的数字信息的系统和方法。 从多个发送信号中获得多个信号流，并且为多个信号流中的每一个选择第一候选信号值。 响应于选择第一候选信号值，还为多个信号流中的每一个选择多个附加候选信号值。 基于所选择的所有候选信号值，从多个信号流计算对数似然比（LLR）。 然后可以基于所计算的LLR来估计数字信息。

公开(公告)号：US08401127B1

公开(公告)日：2013-03-19

申请号：US12469382

申请日：2009-05-20

申请人： Jungwon Lee ,  Jiwoong Choi ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Jiwoong Choi ,  Hui-Ling Lou

IPC分类号： H04B7/02 ,  H04B7/08 ,  H04L1/06 ,  H04L27/06

CPC分类号： H04B7/0413 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/06 ,  H04L25/03242 ,  H04L25/067

摘要： A method of decoding a signal transmitted via a multiple input multiple output (MIMO) communication channel includes receiving a data symbol vector including multiple data symbols that are received at substantially the same time. The received data symbol vector corresponds to a transmitted data symbol vector including multiple transmitted data symbols corresponding to the plurality of data symbols. The method further includes estimating values for transmitted data symbols in a first group of transmitted data symbols using a hard-decision technique. The method further includes calculating likelihood values for bits in a second group of transmitted data symbols using a soft-decision technique based on the estimated values of transmitted data symbols in the first group of transmitted data symbols. The first group of transmitted data symbols does not overlap with the second group of transmitted symbols.

摘要翻译： 一种对通过多输入多输出（MIMO）通信信道发送的信号进行解码的方法包括：接收包括多个数据符号的数据符号向量，该数据符号向量基本上同时被接收。 所接收的数据符号向量对应于包括对应于多个数据符号的多个发送数据符号的发送数据符号向量。 该方法还包括使用硬判决技术估计第一组发送数据符号中的发送数据符号的值。 该方法还包括使用基于所发送的数据符号的第一组中所发送的数据符号的估计值的软判决技术来计算第二组发送数据符号中的比特的似然值。 第一组发送数据符号与第二组发送符号不重叠。

公开(公告)号：US08351549B1

公开(公告)日：2013-01-08

申请号：US12562687

申请日：2009-09-18

申请人： Jiwoong Choi ,  Jungwon Lee ,  Hui-Ling Lou

发明人： Jiwoong Choi ,  Jungwon Lee ,  Hui-Ling Lou

IPC分类号： H04L27/06 ,  H04L27/28

CPC分类号： H04L1/0631 ,  H04B7/0413 ,  H04L1/0054 ,  H04L25/067 ,  H04L27/2647 ,  H04L27/34

摘要： The present disclosure provides methods and apparatus for demodulating a signal transmitted via a multiple input multiple output (MIMO) communication channel. In one embodiment, a method of demodulating a signal transmitted via a MIMO communication channel includes receiving a data symbol vector including multiple data symbols that are received at substantially the same time. The received data symbol vector corresponds to a transmitted data symbol vector. The method further includes generating multiple candidate vectors for the transmitted data symbol vector. The multiple candidate vectors are less than all possible vectors for the transmitted data symbol vector. The method further includes selecting one candidate vector from the multiple candidate vectors using a maximum-likelihood (ML) technique.

摘要翻译： 本公开提供了用于解调经由多输入多输出（MIMO）通信信道发送的信号的方法和装置。 在一个实施例中，一种解调经由MIMO通信信道发送的信号的方法包括：接收包括在同一时间被接收的多个数据符号的数据符号向量。 接收到的数据符号向量对应于发送的数据符号向量。 该方法还包括为所发送的数据符号向量生成多个候选向量。 多个候选向量小于所发送的数据符号向量的所有可能向量。 该方法还包括使用最大似然（ML）技术从多个候选向量中选择一个候选向量。

公开(公告)号：US08331475B1

公开(公告)日：2012-12-11

申请号：US12406587

申请日：2009-03-18

申请人： Arul Durai Murugan Palanivelu ,  Leilei Song ,  Rohit U. Nabar ,  Jungwon Lee ,  Sayandev Mukherjee ,  Hui-Ling Lou

发明人： Arul Durai Murugan Palanivelu ,  Leilei Song ,  Rohit U. Nabar ,  Jungwon Lee ,  Sayandev Mukherjee ,  Hui-Ling Lou

IPC分类号： H04B7/02 ,  H04L27/28

CPC分类号： H04B7/0413 ,  H04L25/03242 ,  H04L25/03961 ,  H04L25/067 ,  H04L2025/03414 ,  H04L2025/0342

摘要： Systems and methods for detecting data in a multiple input/multiple output signal. The method includes receiving a first signal associated with a first data value and a second signal associated with a second data value. A distance value between the received second signal and each possible second data value is calculated. Coordinates for a hypothetical first signal in light of a first possible second data value are calculated, and the first coordinate value is quantized to a nearest constellation point. A distance value between the received second signal and each possible second data value is calculated using the calculated constellation points. A determination is made of a log-likelihood ratio based on the determined distance values.

摘要翻译： 用于检测多输入/多输出信号中的数据的系统和方法。 该方法包括接收与第一数据值相关联的第一信号和与第二数据值相关联的第二信号。 计算接收到的第二信号与每个可能的第二数据值之间的距离值。 计算出根据第一可能的第二数据值的假设第一信号的坐标，并且将第一坐标值量化到最接近的星座点。 使用所计算的星座点来计算所接收的第二信号与每个可能的第二数据值之间的距离值。 基于确定的距离值来确定对数似然比。

公开(公告)号：US08270909B2

公开(公告)日：2012-09-18

申请号：US12750636

申请日：2010-03-30

申请人： Hongyuan Zhang ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Yong Liu

发明人： Hongyuan Zhang ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Yong Liu

IPC分类号： H04B1/00 ,  H04B7/00

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0697 ,  H04L5/0048

摘要： The present disclosure includes systems, apparatuses, and techniques relating to wireless local area network devices. Systems, apparatuses, and techniques include communicating with multiple wireless communication devices to determine characteristics of spatial wireless channels, determining steering matrices based on one or more outputs of the communicating, and transmitting signals that concurrently provide data to the wireless communication devices via different spatial wireless channels. The signals can be spatially steered to the wireless communication devices based on the steering matrices.

摘要翻译： 本公开包括与无线局域网设备相关的系统，设备和技术。 系统，设备和技术包括与多个无线通信设备通信以确定空间无线信道的特性，基于通信的一个或多个输出来确定导向矩阵，以及发送通过不同的空间无线连接向无线通信设备提供数据的信号 频道 可以基于导向矩阵将信号空间转向无线通信设备。

公开(公告)号：US08164521B2

公开(公告)日：2012-04-24

申请号：US12197527

申请日：2008-08-25

申请人： Jungwon Lee ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Hui-Ling Lou

IPC分类号： G01S1/08

CPC分类号： H04W24/10 ,  H04B7/0408 ,  H04B7/0617 ,  H04B7/0632 ,  H04W16/28

摘要： In a technique for communication with a station on a wireless network, the technique includes forming a plurality of narrow-band beams, each having a different angular direction from an antenna of a base station and collectively distributed over a beamspace to form a pseudo-omni-directional beam pattern. That beamspace may span an entire spherical region or a portion thereof, for example, when the narrow-band beams are broadcast over a sector of an entire spherical region. The technique may assign each of the plurality of narrow-band beams to a different frequency band (such as a different channel band or sub-channel) on the wireless network. The technique may simultaneously broadcast the plurality of narrow-band beams in a time-varying manner such that the angular direction of each of the plurality of narrow-band beams varies with time, where that variation may be random or ordered.

摘要翻译： 在用于与无线网络上的站通信的技术中，该技术包括形成多个窄带波束，每个窄带波束具有与基站的天线不同的角度方向，并且共同分布在波束空间上以形成伪全波段 方向光束图案。 该波束空间可以跨越整个球形区域或其一部分，例如当窄带波束在整个球形区域的扇区上广播时。 该技术可以将多个窄带波束中的每一个分配给无线网络上的不同频带（例如，不同的信道频带或子信道）。 该技术可以以时变方式同时广播多个窄带波束，使得多个窄带波束中的每一个的角度方向随时间变化，其中该变化可以是随机的或有序的。

公开(公告)号：US08130864B1

公开(公告)日：2012-03-06

申请号：US12062462

申请日：2008-04-03

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

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

IPC分类号： H04K1/02 ,  H04L25/03 ,  H04L25/49

CPC分类号： H04B7/0408 ,  H04B1/00 ,  H04B7/0417 ,  H04B7/0465 ,  H04B7/0473 ,  H04B7/0663 ,  H04L5/0023 ,  H04L25/0204 ,  H04L2025/03414 ,  H04L2025/03426

摘要： A system and method of beamforming may reduce feedback requirements. In some implementations, a beamforming technique may employ a diagonal matrix as a beamforming matrix along with a stream-to-transmit antenna mapping matrix. In some antenna phase beamforming strategies, a diagonal beamforming matrix in which the diagonal elements have a constant magnitude may be employed. Accordingly, a beamforming system may be utilized with few feedback information bits being transmitted from the beamformee; such a system may also minimize or eliminate power fluctuations among multiple transmit antennae.

摘要翻译： 波束成形的系统和方法可以减少反馈要求。 在一些实现中，波束形成技术可以采用对角矩阵作为波束形成矩阵以及流到发射天线映射矩阵。 在一些天线相位波束形成策略中，可以采用其中对角元素具有恒定幅度的对角波束形成矩阵。 因此，可以利用波束形成系统，而从波束形成器发送的反馈信息比特数很少; 这样的系统还可以最小化或消除多个发射天线之间的功率波动。

公开(公告)号：US08045450B1

公开(公告)日：2011-10-25

申请号：US12643169

申请日：2009-12-21

申请人： Jungwon Lee ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Hui-Ling Lou

IPC分类号： H04J11/00

CPC分类号： H04J11/0063 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0615 ,  H04B7/0885 ,  H04L1/0606 ,  H04L27/2626 ,  H04L27/2647

摘要： A physical layer module includes a mapping module and a plurality of gain modules. The mapping module maps a plurality of coded data streams to a plurality of transmit antennas, in which each transmit antenna is associated with a respective radio frequency channel of a plurality of radio frequency channels. Each gain module is associated with a respective radio frequency channel of the plurality of radio frequency channels, and is configured to apply a complex gain to the coded data stream mapped to the respective radio frequency channel associated with the gain module. The complex gain applied by the gain module differs relative to that applied by other gain modules, and corresponds to the transmit antenna associated with the respective radio frequency channel.

摘要翻译： 物理层模块包括映射模块和多个增益模块。 映射模块将多个编码数据流映射到多个发射天线，其中每个发射天线与多个射频信道的相应射频信道相关联。 每个增益模块与多个射频信道的相应射频信道相关联，并且被配置为对映射到与增益模块相关联的相应射频信道的编码数据流应用复增益。 由增益模块应用的复合增益与其他增益模块所应用的复合增益不同，并且对应于与各个射频信道相关联的发射天线。

公开(公告)号：US08014472B1

公开(公告)日：2011-09-06

申请号：US12393017

申请日：2009-02-25

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

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

IPC分类号： H03D1/00

CPC分类号： H04L27/2675 ,  H04L27/2659 ,  H04L27/2679

摘要： Systems and techniques relating to wireless communications are described. A described technique includes receiving a plurality of symbols, observing a plurality of data samples in adjacent symbols, and calculating an estimate of an integer portion of a carrier frequency offset based on a cyclic shift and a phase shift of the data samples between symbols. Calculating the estimate can include calculating sum values corresponding to respective symbol indices. Each of the sum values can be based on a summation of max values that correspond to respective data subcarrier indices, the max values being based on a maximum of an absolute value of a real component of a base value and an absolute value of an imaginary component of the base value, where the base value is based on at least one of the data samples.

摘要翻译： 描述与无线通信相关的系统和技术。 所描述的技术包括接收多个符号，观察相邻符号中的多个数据样本，并且基于符号之间的数据采样的循环移位和相移来计算载波频率偏移的整数部分的估计。 计算估计可以包括计算对应于各个符号索引的和值。 每个和值可以基于对应于各个数据子载波索引的最大值的总和，最大值基于基本值的实数分量的绝对值的最大值和虚部的绝对值 的基值，其中基值基于至少一个数据样本。