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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

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。

6. 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。

7. 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。

8. 发明授权

US08477813B2 Physical layer data unit format 有权
标题翻译：物理层数据单元格式
公开(公告)号：US08477813B2
公开(公告)日：2013-07-02
申请号：US12548205
申请日：2009-08-26
申请人： Hongyuan Zhang , Rohit U. Nabar , Manyuan Shen , Songping Wu , Hui-Ling Lou , Yong Liu
发明人： Hongyuan Zhang , Rohit U. Nabar , Manyuan Shen , Songping Wu , Hui-Ling Lou , Yong Liu
IPC分类号： H04J3/06
CPC分类号： H04W16/28 , H04L25/03343 , H04L27/2613 , H04L2025/03426 , H04L2025/03789 , H04L2025/03815
摘要： In a wireless communication system wherein communication devices exchange information utilizing data units that conform to a first format, a beamforming training (BFT) data unit that conforms to a second format is transmitted, wherein a length of the BFT data unit is shorter than lengths supported by the first format, wherein the BFT data unit is for transmitting PHY beamforming training information. Information to indicate the BFT data unit conforms to the second format is transmitted to a receiving device. The BFT data unit is generated according to the second format, wherein the BFT data unit includes BFT information elements. The BFT data unit is then transmitted to the receiving device.
摘要翻译：在其中通信设备利用符合第一格式的数据单元交换信息的无线通信系统中，发送符合第二格式的波束形成训练（BFT）数据单元，其中所述BFT数据单元的长度短于所支持的长度通过第一格式，其中BFT数据单元用于发送PHY波束形成训练信息。用于指示符合第二格式的BFT数据单元的信息被发送到接收设备。 BFT数据单元根据第二格式生成，其中BFT数据单元包括BFT信息元素。然后将BFT数据单元发送到接收设备。

9. 发明授权

US08428530B1 Increasing the robustness of channel estimates derived through sounding for WLAN 有权
公开(公告)号：US08428530B1
公开(公告)日：2013-04-23
申请号：US13346521
申请日：2012-01-09
申请人： Rohit U. Nabar , Hongyuan Zhang , Arul Durai Murugan Palanivelu
发明人： Rohit U. Nabar , Hongyuan Zhang , Arul Durai Murugan Palanivelu
IPC分类号： H04B1/26
CPC分类号： H04L25/0228 , H04B7/0413 , H04L5/0023 , H04L25/0204 , H04W72/085
摘要： A plurality of training signal sets are transmitted. Each training signal set includes information sufficient to determine a channel estimate corresponding to a communication channel from a first station to a second station. A refined channel estimate is determined based on reception of the plurality of training signal sets.

10. 发明授权

US08379745B1 Forward channel variation detection in a wireless communication system 有权
标题翻译：无线通信系统中的前向信道变化检测
公开(公告)号：US08379745B1
公开(公告)日：2013-02-19
申请号：US12168595
申请日：2008-07-07
申请人： Rohit U. Nabar , Hongyuan Zhang , Jungwon Lee
发明人： Rohit U. Nabar , Hongyuan Zhang , Jungwon Lee
IPC分类号： H04B7/02
CPC分类号： H04B7/0456 , H04B7/0617 , H04B7/0619 , H04L1/0003 , H04L1/0009 , H04L25/0222 , H04L25/0228
摘要： A method and apparatus for detecting variations in the forward wireless channel in a wireless communication system. A plurality of reverse channel estimates in a reverse wireless channel are monitored, and a rate of change is measured between the plurality of reverse channel estimates in the reverse wireless channel. A rate of change in the forward wireless channel is estimated from the rate of change between the plurality of reverse channel estimates in the reverse wireless channel. If the estimated rate of change in the forward wireless channel exceeds a threshold, an update of a steering matrix is initiated.
摘要翻译：一种用于检测无线通信系统中的前向无线信道中的变化的方法和装置。监视反向无线信道中的多个反向信道估计，并且在反向无线信道中的多个反向信道估计之间测量变化率。根据反向无线信道中的多个反向信道估计之间的变化率来估计前向无线信道的变化率。如果前向无线信道的估计速率变化超过阈值，则启动导引矩阵的更新。

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