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1. 发明授权

US08761302B1 Method and apparatus for implementing transmit diversity in OFDM systems 有权
标题翻译：在OFDM系统中实现发射分集的方法和装置
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。

2. 发明授权

US08130858B1 Method and apparatus for implementing transmit diversity in OFDM systems 有权
标题翻译：在OFDM系统中实现发射分集的方法和装置
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。

3. 发明授权

US08867635B1 Generalized co-phasing for multiple transmitting and receiving antennas 有权
标题翻译：用于多个发射和接收天线的广义同相
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。

4. 发明授权

US08077785B1 Generalized co-phasing for multiple transmitting and receiving antennas 有权
标题翻译：用于多个发射和接收天线的广义同相
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。

5. 发明授权

US08451931B1 Method and apparatus for implementing transmit diversity in OFDM systems 有权
公开(公告)号：US08451931B1
公开(公告)日：2013-05-28
申请号：US13403949
申请日：2012-02-23
申请人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou , Rohit Nabar , Yakun Sun
发明人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou , Rohit Nabar , Yakun Sun
IPC分类号： H04B7/00
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.

6. 发明授权

US08472381B1 Methods and apparatus for antenna spoofing 有权
标题翻译：天线欺骗的方法和装置
公开(公告)号：US08472381B1
公开(公告)日：2013-06-25
申请号：US12856421
申请日：2010-08-13
申请人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou , Yakun Sun
发明人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou , Yakun Sun
IPC分类号： H04W4/00
CPC分类号： H04B7/0456 , H04B7/0417 , H04B7/0608 , H04B7/0617 , H04B7/0671 , H04B7/12 , H04L25/0242 , H04L25/03898 , H04L25/03949 , H04L49/101
摘要： In a method for utilizing beamforming in a wireless communication system, reference signals corresponding to a first communication channel from a first communication device to a second communication device are received, and an estimate of the first communication channel is generated using the received reference signals. One or more transmit beamforming vectors are calculated using the estimate of the first communication channel, and the one or more transmit beamforming vectors are utilized to transmit signals via a second communication channel from the second communication device to the first communication device while the first communication device assumes that the first second communication device is not utilizing beamforming.
摘要翻译：在无线通信系统中利用波束形成的方法中，接收对应于从第一通信设备到第二通信设备的第一通信信道的参考信号，并且使用所接收的参考信号来生成第一通信信道的估计。使用第一通信信道的估计来计算一个或多个发射波束形成向量，并且利用一个或多个发射波束成形向量将信号经由第二通信信道从第二通信设备传输到第一通信设备，同时第一通信设备假设第一第二通信设备不使用波束形成。

7. 发明授权

US08654902B2 BICM decoding in the presence of co-channel interference 有权
标题翻译：在存在同频道干扰的情况下进行BICM解码
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）。

8. 发明授权

US08135098B2 BICM decoding in the presence of co-channel interference 有权
标题翻译：在存在同频道干扰的情况下进行BICM解码
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）。

9. 发明授权

US08331475B1 Low complexity technique for log-likelihood ratio computation 有权
标题翻译：对数似然比计算的低复杂度技术
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。

10. 发明授权

US08130864B1 System and method of beamforming with reduced feedback 有权
标题翻译：具有减少反馈的波束成形的系统和方法
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。

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