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1. 发明申请

US20150350950A1 PHYSICAL LAYER FRAME FORMAT FOR LONG RANGE WLAN 审中-公开
标题翻译：长距离WLAN的物理层框架格式
公开(公告)号：US20150350950A1
公开(公告)日：2015-12-03
申请号：US14518846
申请日：2014-10-20
申请人： Hongyuan Zhang , Rohit U. Nabar , Raja Banerjea , Yong Liu
发明人： Hongyuan Zhang , Rohit U. Nabar , Raja Banerjea , Yong Liu
IPC分类号： H04W28/06 , H04L27/26 , H04L29/06
CPC分类号： H04W28/06 , H04L5/0048 , H04L5/0053 , H04L27/2602 , H04L27/2613 , H04L27/2666 , H04L69/02 , H04L69/22 , H04W84/12
摘要： In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, the PHY data unit is generated according to a first PHY format when the PHY data unit is to be transmitted in a regular mode, wherein the first PHY format corresponds to a first bandwidth. The PHY data unit is generated according to a second PHY format when the PHY data unit is to be transmitted in an extended range mode, wherein the second PHY format corresponds to a second bandwidth. A preamble of the PHY data unit is modulated such that a receiving device can auto-detect whether the PHY data unit was transmitted at the first bandwidth or the second bandwidth.
摘要翻译：在用于生成经由通信信道传输的物理层（PHY）数据单元的方法中，当PHY数据单元将以常规模式发送时，根据第一PHY格式生成PHY数据单元，其中第一PHY 格式对应于第一带宽。当要在扩展范围模式中发送PHY数据单元时，根据第二PHY格式生成PHY数据单元，其中第二PHY格式对应于第二带宽。对PHY数据单元的前导码进行调制，使得接收设备可以自动检测PHY数据单元是否以第一带宽或第二带宽发送。

2. 发明授权

US09106295B1 Reuse of a matrix equalizer for the purpose of transmit beamforming in a wireless MIMO communication system 有权
标题翻译：在无线MIMO通信系统中为了发射波束成形的目的重用矩阵均衡器
公开(公告)号：US09106295B1
公开(公告)日：2015-08-11
申请号：US13550298
申请日：2012-07-16
申请人： Hongyuan Zhang , Leilei Song , Rohit U. Nabar
发明人： Hongyuan Zhang , Leilei Song , Rohit U. Nabar
IPC分类号： H04B7/00 , H04B7/06 , H04L25/03
CPC分类号： H04B7/0626 , H04B7/0417 , H04B7/0478 , H04L25/03343 , H04L25/03949 , H04L2025/03426
摘要： An equalizer is applied to a signal to be transmitted via at least one multiple input, multiple output (MIMO) channel or received via at least one MIMO channel using a matrix equalizer computational device. Channel state information (CSI) is received, and the CSI is provided as an input to the matrix equalizer computational device when the matrix equalizer computational device is not needed for matrix equalization. One or more transmit beamsteering codewords are selected from a transmit beamsteering codebook based on output generated by the matrix equalizer computational device in response to the CSI input to the matrix equalizer computational device.
摘要翻译：均衡器被应用于要经由至少一个多输入多输出（MIMO）信道发射的信号或者通过使用矩阵均衡器计算设备经由至少一个MIMO信道接收的信号。当矩阵均衡器计算设备不需要用于矩阵均衡时，接收到信道状态信息（CSI），并且将CSI作为矩阵均衡器计算设备的输入提供。响应于对矩阵均衡器计算装置的CSI输入，基于由矩阵均衡器计算装置产生的输出，从发射波束导向码本中选择一个或多个发射波束引导码字。

3. 发明授权

US08891597B1 Calibration for implicit transmit beamforming 有权
标题翻译：用于隐式发射波束成形的校准
公开(公告)号：US08891597B1
公开(公告)日：2014-11-18
申请号：US13185464
申请日：2011-07-18
申请人： Hongyuan Zhang , Rohit U. Nabar
发明人： Hongyuan Zhang , Rohit U. Nabar
IPC分类号： H04B1/38
CPC分类号： H04B17/11 , H04B7/0413 , H04B7/0617 , H04L25/0224
摘要： In a beamforming method, one or more compensation factor sets are applied to antennas of a first communication device. A modulation and coding scheme (MCS) for communicating with a second communication device is selected while applying a first compensation factor set to the antennas of the first communication device. For each of the one or more compensation factor sets, (i) a steering matrix is developed based on a data unit received at the first communication device from the second communication device, (ii) one or more data units are transmitted from the first communication device to the second communication device while applying the steering matrix and the compensation factor set to the first plurality of antennas, and (iii) a channel performance indicator is determined based on the one or more data units. A compensation factor set to be used in subsequent beamforming operations is selected based on the channel performance indicator.
摘要翻译：在波束成形方法中，将一个或多个补偿因子组应用于第一通信设备的天线。在对第一通信设备的天线施加第一补偿因子集的同时，选择用于与第二通信设备通信的调制和编码方案（MCS）。对于一个或多个补偿因子集合中的每一个，（i）基于在第一通信设备从第二通信设备接收的数据单元开发导引矩阵，（ii）从第一通信发送一个或多个数据单元将所述导向矩阵和所述补偿系数应用于所述第一多个天线，并且（iii）基于所述一个或多个数据单元来确定信道性能指示符，从而将所述设备连接到所述第二通信设备。基于信道性能指标来选择设置用于后续波束成形操作的补偿因子。

4. 发明授权

US08873484B1 Hybrid beamforming architecture 有权
标题翻译：混合波束成形架构
公开(公告)号：US08873484B1
公开(公告)日：2014-10-28
申请号：US13285188
申请日：2011-10-31
申请人： Ying-Cheng Lee , Timothy J. Donovan , Dharmesh C. Bhagatwala , Ken Kinwah Ho , Hongyuan Zhang , Rohit U. Nabar , Tsunglun Yu
发明人： Ying-Cheng Lee , Timothy J. Donovan , Dharmesh C. Bhagatwala , Ken Kinwah Ho , Hongyuan Zhang , Rohit U. Nabar , Tsunglun Yu
IPC分类号： H04W4/00
CPC分类号： H04B7/0617 , H04B7/046 , H04B7/0626 , H04B7/0634 , H04B7/0689 , H04B7/0871
摘要： Systems, methods, and other embodiments associated with a hybrid beamforming architecture are described. According to one embodiment, an apparatus includes a beamforming mode detection logic configured to select a beamforming mode based, at least in part, on a packet received from a wireless device. The apparatus also includes a beamformee unit and a beamformer unit. The beamformee unit is configured to derive steering information from channel related information in the packet. The beamformer unit is configured to provide weights from a steering matrix to a transmitter performing transmit beamforming on a subsequent packet being transmitted to the wireless device. The beamforming mode detection logic routes at least part of the packet to one or both of the beamformee unit and the beamformer unit based, at least in part, on the selected beamforming mode.
摘要翻译：描述了与混合波束形成架构相关联的系统，方法和其他实施例。根据一个实施例，一种装置包括波束形成模式检测逻辑，其被配置为至少部分地基于从无线设备接收的分组来选择波束成形模式。该装置还包括波束形成单元和波束形成单元。波束形成单元被配置为从分组中的信道相关信息中导出转向信息。波束形成器单元被配置为从发送到无线设备的后续分组提供从导向矩阵到发射机执行发射波束成形的权重。至少部分地基于所选择的波束形成模式，波束形成模式检测逻辑将分组的至少一部分路由到波束形成单元和波束形成单元中的一个或两个。

5. 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。

6. 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。

7. 发明授权

US08724720B2 Methods and apparatus for WLAN transmission 有权
标题翻译： WLAN传输的方法和装置
公开(公告)号：US08724720B2
公开(公告)日：2014-05-13
申请号：US12846681
申请日：2010-07-29
申请人： Sudhir Srinivasa , Hongyuan Zhang , Rohit U. Nabar
发明人： Sudhir Srinivasa , Hongyuan Zhang , Rohit U. Nabar
IPC分类号： H04L27/28
CPC分类号： H04L1/0005 , H04L1/0016 , H04L27/2607 , H04L27/2608 , H04L27/34 , H04W84/12
摘要： In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, a first set of modulation coding schemes (MCSs) and a second set of MCSs that correspond to a number of spatial streams and a number of encoders are provided. The first set of MCSs correspond to a first channel bandwidth and the second set of MCSs correspond to a second channel bandwidth, and the first set of MCSs is different than the second set of MCSs. An MCS is selected from the first set of MCSs when the PHY data unit is to be transmitted using a channel having the first channel bandwidth, and the MCS is selected from the second set of MCSs when the PHY data unit is to be transmitted using a channel having the second channel bandwidth. Information bits are encoded using the number of encoders and according to the selected MCS, and the encoded information bits are parsed into the number of spatial streams. The encoded information bits are modulated according to the MCS, and a plurality of OFDM symbols are formed based on the modulated encoded information bits.
摘要翻译：在用于生成经由通信信道进行传输的物理层（PHY）数据单元的方法中，与多个空间流和多个编码器相对应的第一组调制编码方案（MCS）和第二组MCS相对应，提供。第一组MCS对应于第一信道带宽，并且第二组MCS对应于第二信道带宽，并且第一组MCS不同于第二组MCS。当要使用具有第一信道带宽的信道来发送PHY数据单元时，从第一组MCS中选择MCS，并且当使用第一组MCS发送PHY数据单元时，从第二组MCS中选择MCS 信道具有第二信道带宽。使用编码器的数量并根据所选择的MCS对信息比特进行编码，并将编码的信息比特解析为空间流的数量。编码信息比特根据MCS进行调制，并且基于调制编码信息比特形成多个OFDM符号。

8. 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）。

9. 发明授权

US08638875B1 Transmit beamforming systems and methods 有权
标题翻译：发射波束成形系统和方法
公开(公告)号：US08638875B1
公开(公告)日：2014-01-28
申请号：US12407345
申请日：2009-03-19
申请人： Hongyuan Zhang , Rohit U. Nabar
发明人： Hongyuan Zhang , Rohit U. Nabar
IPC分类号： H04L27/00 , H04L1/02 , H04K1/10 , H04B7/02
CPC分类号： H04B7/0689 , H04B7/0413 , H04B7/0617 , H04K1/10 , H04K3/224 , H04K2203/32 , H04L1/0003 , H04L5/0023 , H04L5/0044 , H04L5/0091 , H04L27/2626
摘要： A system includes a transmitting module, a mapping module, and an updating module. The transmitting module transmits a first set of data streams using N subcarriers when a wireless device operates in a first mode. The transmitting module transmits a second set of data streams using M subcarriers when the device operates in a second mode. N and M are integers greater than or equal to 1. The mapping module maps the first set of data streams to a first set of antennas of the device based on a first set of mapping values and maps the second set of data streams to a second set of antennas of the device based on a second set of mapping values. The updating module generates the second set of mapping values based on the first set of mapping values when the device transitions from the first mode to the second mode.
摘要翻译：系统包括发送模块，映射模块和更新模块。当无线设备以第一模式操作时，发送模块使用N个子载波发送第一组数据流。当设备以第二模式操作时，发射模块使用M个子载波发送第二组数据流。 N和M是大于或等于1的整数。映射模块基于第一组映射值将第一组数据流映射到设备的第一组天线，并将第二组数据流映射到第二组基于第二组映射值的设备的天线集合。当设备从第一模式转换到第二模式时，更新模块基于第一组映射值生成第二组映射值。

10. 发明申请

US20130259017A1 Physical Layer Frame Format for WLAN 有权
标题翻译： WLAN的物理层帧格式
公开(公告)号：US20130259017A1
公开(公告)日：2013-10-03
申请号：US13856277
申请日：2013-04-03
申请人： Hongyuan Zhang , Sudhir Srinivasa , Rohit U. Nabar , Raja Banerjea
发明人： Hongyuan Zhang , Sudhir Srinivasa , Rohit U. Nabar , Raja Banerjea
IPC分类号： H04W84/02
CPC分类号： H04L1/009 , H03M13/098 , H03M13/655 , H04L1/0041 , H04L1/0061 , H04L1/0072 , H04L1/0079 , H04L5/0007 , H04W84/02
摘要： In a method for generating a data unit conforming to a first communication protocol, a first field and a second field to be included in a preamble of the data unit are generated. The first field includes a first set of one or more information bits that indicate a duration of the data unit and is formatted such that the first field allows a receiver device that conforms to a second communication protocol to determine the duration of the data unit. The second field includes a second set of one or more information bits that indicate to a receiver device that conforms to the first communication protocol that the data unit conforms to the first communication protocol. The first field and the second field are modulated using a modulation scheme specified for a field corresponding to the first field and the second field, respectively, by the second communication protocol.
摘要翻译：在用于生成符合第一通信协议的数据单元的方法中，生成要包括在数据单元的前导码中的第一字段和第二字段。第一字段包括指示数据单元的持续时间并且被格式化的一个或多个信息比特的第一组，使得第一场允许符合第二通信协议的接收机设备确定数据单元的持续时间。第二字段包括一个或多个信息比特的第二组，其向符合第一通信协议的接收机设备指示数据单元符合第一通信协议。通过第二通信协议，分别使用针对对应于第一场和第二场的场指定的调制方案来调制第一场和第二场。

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