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：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：US08077785B1

公开(公告)日：2011-12-13

申请号：US12098924

申请日：2008-04-07

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：US08130858B1

公开(公告)日：2012-03-06

申请号：US12129473

申请日：2008-05-29

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： H04B7/02

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 phases are determined. The plurality of phases are to be applied to a plurality of transmit signals to be transmitted via a plurality of transmit antennas. Each transmit signal comprises a plurality of sub-carriers. Each phase of the plurality of phases is to be applied to a corresponding block of sub carriers in the plurality of transmit signals, and each block of sub-carriers comprises a plurality of sub-carriers that are adjacent in frequency. The plurality of phases are applied to the plurality of transmit signals to implement transmit diversity. Each phase is applied to the corresponding block of sub carriers in the plurality of transmit signals.

摘要翻译： 确定多个阶段。 多个相位应用于要经由多个发射天线发射的多个发射信号。 每个发射信号包括多个子载波。 将多个相位的每个相位施加到多个发射信号中的相应的子载波块，并且每个子载波块包括在频率上相邻的多个子载波。 多个相位被施加到多个发射信号以实现发射分集。 每个相位被施加到多个发射信号中的相应的子载波块。

公开(公告)号：US08654902B2

公开(公告)日：2014-02-18

申请号：US13402381

申请日：2012-02-22

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： H04L27/06

CPC分类号： H04B1/1027 ,  H04L25/067

摘要： Systems and methods are provided for computing soft information for digital information based on a received signal, where the received signal suffers from noise and interference. A receiver that decodes the received signal may estimate channel information, such as the channel gain, associated with the interfering source. The receiver may also obtain modulation information through a backbone network or by decoding control information transmitted by the interfering source. Using the modulation information and the channel information, the receiver may estimate the effect that interference has on the received signal, and may compute soft information (e.g., a log-likelihood ratio) for the digital information.

摘要翻译： 提供了系统和方法，用于基于接收到的信号来计算用于数字信息的软信息，其中所接收的信号受到噪声和干扰的影响。 对接收到的信号进行解码的接收机可以估计与干扰源相关联的信道信息，例如信道增益。 接收机还可以通过骨干网获得调制信息，或通过解码由干扰源发送的控制信息。 使用调制信息和信道信息，接收机可以估计干扰对接收信号的影响，并且可以计算数字信息的软信息（例如，对数似然比）。

公开(公告)号：US08135098B2

公开(公告)日：2012-03-13

申请号：US12119264

申请日：2008-05-12

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： H04B1/10

CPC分类号： H04B1/1027 ,  H04L25/067

摘要： Systems and methods are provided for computing soft information for digital information based on a received signal, where the received signal suffers from noise and interference. A receiver that decodes the received signal may estimate channel information, such as the channel gain, associated with the interfering source. The receiver may also obtain modulation information through a backbone network or by decoding control information transmitted by the interfering source. Using the modulation information and the channel information, the receiver may estimate the effect that interference has on the received signal, and may compute soft information (e.g., a log-likelihood ratio) for the digital information.

摘要翻译： 提供了系统和方法，用于基于接收到的信号来计算用于数字信息的软信息，其中所接收的信号受到噪声和干扰的影响。 对接收到的信号进行解码的接收机可以估计与干扰源相关联的信道信息，例如信道增益。 接收机还可以通过骨干网获得调制信息，或通过解码由干扰源发送的控制信息。 使用调制信息和信道信息，接收机可以估计干扰对接收信号的影响，并且可以计算数字信息的软信息（例如，对数似然比）。

公开(公告)号：US08229017B1

公开(公告)日：2012-07-24

申请号：US12330268

申请日：2008-12-08

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： H04B7/02

CPC分类号： H04B7/0665

摘要： A method and apparatus for a communication system having a first transceiver device having a first plurality of antennas and a second transceiver device having a second plurality of antennas determines a channel estimation matrix describing a forward channel in which a signal travels from the first transceiver device to the second transceiver device. The channel estimation matrix is decomposed to derive a unitary matrix and an upper triangular matrix. A precoding matrix is developed using the upper triangular matrix, and the precoding matrix is used to control transmission of a modulated signal.

摘要翻译： 一种具有具有第一多个天线的第一收发器装置和具有第二多个天线的第二收发器装置的通信系统的方法和装置确定了描述信号从第一收发器装置行进到前向信道的信道估计矩阵， 第二收发器装置。 信道估计矩阵被分解以导出酉矩阵和上三角矩阵。 使用上三角矩阵开发预编码矩阵，并且预编码矩阵用于控制调制信号的传输。

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：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：US08243860B1

公开(公告)日：2012-08-14

申请号：US12171790

申请日：2008-07-11

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： H03D1/04

CPC分类号： H04L25/0206 ,  H04L25/0228 ,  H04L25/03331

摘要： Apparatus and methods are provided for computing soft information at a receiver having a plurality of receive antennas. The receiver may be a mobile station or a base station, and can receive a signal vector that includes an intended signal from a first source as well as interfering signals from one or more other, interfering sources. The receiver can determine modulation information, such as the modulation scheme, used by each of the interfering sources. The mobile station can also estimate channel information, such as channel gain information, associated with each interfering source. Using the modulation and channel information, the receiver can compute soft information, such as a log-likelihood ratio. In some embodiments, the receiver can adaptively determine which interference sources and which receive antennas to use when computing the soft information.

摘要翻译： 提供了用于在具有多个接收天线的接收机处计算软信息的装置和方法。 接收机可以是移动站或基站，并且可以接收包括来自第一源的预期信号以及来自一个或多个其它干扰源的干扰信号的信号向量。 接收机可以确定由每个干扰源使用的调制方式，例如调制方案。 移动站还可以估计与每个干扰源相关联的信道信息，例如信道增益信息。 使用调制和信道信息，接收机可以计算软信息，例如对数似然比。 在一些实施例中，当计算软信息时，接收机可以自适应地确定哪些干扰源和哪些接收天线使用。