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    PROVIDING TRANSMISSION PARAMETERS FOR MULTI-USER COMMUNICATION
    2.
    发明申请
    PROVIDING TRANSMISSION PARAMETERS FOR MULTI-USER COMMUNICATION 审中-公开
    提供用于多用户通信的传输参数

    公开(公告)号：US20130272347A1

    公开(公告)日：2013-10-17

    申请号：US13444176

    申请日：2012-04-11

    申请人： Simone Merlin ,  Albert van Zelst ,  Maarten Menzo Wentink

    发明人： Simone Merlin ,  Albert van Zelst ,  Maarten Menzo Wentink

    IPC分类号： H04B1/38

    CPC分类号： H04B1/38 ,  H04B7/0452

    摘要： Link adaptation is supported in a multi-user MIMO environment. In some aspects, a frame including a transmission parameter request (e.g., a null data packet announcement (NDPA) including a modulation and coding scheme (MCS) request (MRQ)) specifies multiple destinations. In some aspects, a decision to transmit a frame specifying multiple destinations is based on whether all of destinations support providing feedback to such a frame. In some aspects, transmission parameter feedback (e.g., MCS feedback (MFB)) including channel estimate information is provided in a case where MFB of type MU is requested.

    摘要翻译： 在多用户MIMO环境中支持链路自适应。 在一些方面，包括传输参数请求（例如，包括调制和编码方案（MCS）请求（MRQ）的空数据分组通知（NDPA））的帧指定多个目的地。 在一些方面，发送指定多个目的地的帧的决定基于所有目的地是否支持向这样的帧提供反馈。 在一些方面，在请求类型MU的MFB的情况下提供包括信道估计信息的传输参数反馈（例如，MCS反馈（MFB））。

    CHANNEL AND BANDWIDTH SWITCH PROCEDURES FOR WIRELESS NETWORKS
    3.
    发明申请
    CHANNEL AND BANDWIDTH SWITCH PROCEDURES FOR WIRELESS NETWORKS 有权
    无线网络的通道和带宽切换程序

    公开(公告)号：US20130070701A1

    公开(公告)日：2013-03-21

    申请号：US13622845

    申请日：2012-09-19

    申请人： Simone Merlin ,  Youhan Kim ,  Albert van Zelst

    发明人： Simone Merlin ,  Youhan Kim ,  Albert van Zelst

    IPC分类号： H04W72/04

    CPC分类号： H04W28/20 ,  H04W74/002

    摘要： Certain aspects of the present disclosure generally relate to apparatus and methods for switching operating bandwidth and/or operating channel in a wireless communications network. A transmitting STA may send an announcement of a switch to a particular bandwidth in a frame, wherein the presence of absence of a Secondary Channel Offset Element and a Wide Bandwidth Channel Switch Element in the frame indicates whether the particular bandwidth belongs to a first or second set of operating bandwidths. The presence of the Secondary Channel Offset Element and a Wide Bandwidth Channel Switch Element in the frame may indicate a switch to the first set of operating bandwidths. The first set of operating bandwidths may include VHT channels including 80 MHz only, 80+80 MHz and 160 MHz channels. The absence of the Secondary Channel Offset Element and a Wide Bandwidth Channel Switch Element in the frame may indicate a switch to the second set of operating bandwidths. The second set of operating bandwidths may include 20 MHz and 40 MHz channels.

    摘要翻译： 本公开的某些方面通常涉及用于在无线通信网络中切换操作带宽和/或操作信道的装置和方法。 发送STA可以在一个帧中向交换机的特定带宽发送通知，其中该帧中存在辅助信道偏移元素和宽带宽信道切换元件指示特定带宽是否属于第一或第二 一组工作带宽。 帧中的次级信道偏移元素和宽带宽信道切换元件的存在可以指示切换到第一组工作带宽。 第一组工作带宽可能包括只有80 MHz，80 + 80 MHz和160 MHz通道的VHT通道。 帧中的次级信道偏移元素和宽带宽信道切换元件的缺失可以指示切换到第二组操作带宽。 第二组工作带宽可能包括20 MHz和40 MHz通道。

    Preamble design for television white space transmissions
    6.
    发明授权
    Preamble design for television white space transmissions 有权
    电视空白传输的序言设计

    公开(公告)号：US08830815B2

    公开(公告)日：2014-09-09

    申请号：US13471947

    申请日：2012-05-15

    申请人： Sameer Vermani ,  Santosh Paul Abraham ,  Stephen J. Shellhammer ,  Albert van Zelst ,  Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV

    发明人： Sameer Vermani ,  Santosh Paul Abraham ,  Stephen J. Shellhammer ,  Albert van Zelst ,  Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV

    IPC分类号： H04J11/00 ,  H04L5/00 ,  H04L29/06 ,  H04L27/26 ,  H04W4/00

    CPC分类号： H04L69/00 ,  H04L5/0053 ,  H04L27/2602 ,  H04W4/00

    摘要： A method for generating a Physical Layer Convergence Protocol Packet Data Unit (PPDU) having a preamble and a payload for television white space transmission (TVWS) is provided. The symbols of the PPDU each include 128 total (orthogonal frequency-division multiplexing) OFDM tones or 256 total OFDM tones. The preamble includes a signal (SIG) field symbol having 108 OFDM data tones if the symbols of the PPDU include 128 total OFDM tones or having 234 OFDM data tones if the symbols of the PPDU include 256 total OFDM tones. The SIG field symbol indicates at least one of an amount of data in the payload or a length of time that the PPDU will occupy the television broadcast frequency spectrum. The PPDU is generated by down-clocking an 802.11ac signal by a factor so that the bandwidth of the PPDU decreases down to one appropriate for use in a TVWS channel.

    摘要翻译： 提供了一种用于产生具有用于电视白空间传输（TVWS）的前同步码和有效载荷的物理层汇聚协议分组数据单元（PPDU）的方法。 PPDU的符号各自包括128个总共（正交频分复用）OFDM音调或256个总OFDM音调。 如果PPDU的符号包括128个总OFDM音调或具有234个OFDM数据音调，如果PPDU的符号包括256个总OFDM音调，则前导码包括具有108个OFDM数据音调的信号（SIG）字段符号。 SIG字段符号指示有效载荷中的数据量或PPDU将占用电视广播频谱的时间长度中的至少一个。 PPDU是通过将802.11ac信号衰减一个因子来产生的，使得PPDU的带宽减小到适合于在TVWS信道中使用的PPDU的带宽。

    PREAMBLE DESIGN FOR TELEVISION WHITE SPACE TRANSMISSIONS
    7.
    发明申请
    PREAMBLE DESIGN FOR TELEVISION WHITE SPACE TRANSMISSIONS 有权
    电视白空间传输的前置设计

    公开(公告)号：US20130128807A1

    公开(公告)日：2013-05-23

    申请号：US13471947

    申请日：2012-05-15

    申请人： Sameer Vermani ,  Santosh Paul Abraham ,  Stephen J. Shellhammer ,  Albert van Zelst ,  Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV

    发明人： Sameer Vermani ,  Santosh Paul Abraham ,  Stephen J. Shellhammer ,  Albert van Zelst ,  Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV

    IPC分类号： H04L12/56 ,  H04W4/00

    CPC分类号： H04L69/00 ,  H04L5/0053 ,  H04L27/2602 ,  H04W4/00

    摘要： A method for generating a Physical Layer Convergence Protocol Packet Data Unit (PPDU) having a preamble and a payload for television white space transmission (TVWS) is provided. The symbols of the PPDU each include 128 total (orthogonal frequency-division multiplexing) OFDM tones or 256 total OFDM tones. The preamble includes a signal (SIG) field symbol having 108 OFDM data tones if the symbols of the PPDU include 128 total OFDM tones or having 234 OFDM data tones if the symbols of the PPDU include 256 total OFDM tones. The SIG field symbol indicates at least one of an amount of data in the payload or a length of time that the PPDU will occupy the television broadcast frequency spectrum. The PPDU is generated by down-clocking an 802.11ac signal by a factor so that the bandwidth of the PPDU decreases down to one appropriate for use in a TVWS channel.

    摘要翻译： 提供了一种用于产生具有用于电视白空间传输（TVWS）的前同步码和有效载荷的物理层汇聚协议分组数据单元（PPDU）的方法。 PPDU的符号各自包括128个总共（正交频分复用）OFDM音调或256个总OFDM音调。 如果PPDU的符号包括128个总OFDM音调或具有234个OFDM数据音调，如果PPDU的符号包括256个总OFDM音调，则前导码包括具有108个OFDM数据音调的信号（SIG）字段符号。 SIG字段符号指示有效载荷中的数据量或PPDU将占用电视广播频谱的时间长度中的至少一个。 PPDU是通过将802.11ac信号衰减一个因子来产生的，使得PPDU的带宽减小到适合于在TVWS信道中使用的PPDU的带宽。

    CHANNEL ESTIMATION BASED ON COMBINED CALIBRATION COEFFICIENTS
    8.
    发明申请
    CHANNEL ESTIMATION BASED ON COMBINED CALIBRATION COEFFICIENTS 审中-公开
    基于组合校准系数的通道估计

    公开(公告)号：US20120300864A1

    公开(公告)日：2012-11-29

    申请号：US13186321

    申请日：2011-07-19

    申请人： Simone Merlin ,  Didier Johannes Richard Van Nee ,  Albert van Zelst

    发明人： Simone Merlin ,  Didier Johannes Richard Van Nee ,  Albert van Zelst

    IPC分类号： H04L27/28

    CPC分类号： H04L25/0204 ,  H04B7/0617 ,  H04B7/0857 ,  H04L25/0228

    摘要： Calibration coefficients are combined to provide more robust calibration. In some implementations, calibration coefficients are generated by acquiring two or more sets of calibration coefficients that are associated with different periods of time, different receive devices, or some other condition. These different sets of calibration coefficients are then combined using maximal ratio combining or some other suitable technique. The resulting combined calibration coefficients are used to calibrate implicit channel estimates.

    摘要翻译： 校准系数被组合以提供更强大的校准。 在一些实施方式中，通过获取与不同时间段，不同接收设备或某些其他条件相关联的两组或多组校准系数来生成校准系数。 然后使用最大比组合或一些其它合适的技术来组合这些不同的校准系数集合。 所得到的组合校准系数用于校准隐式通道估计。

    Near soft-output maximum-likelihood detection for multiple-input multiple-output systems
    9.
    发明授权
    Near soft-output maximum-likelihood detection for multiple-input multiple-output systems 有权
    多输入多输出系统的近似软输出最大似然检测

    公开(公告)号：US08462867B2

    公开(公告)日：2013-06-11

    申请号：US11849025

    申请日：2007-08-31

    申请人： Albert van Zelst ,  Brian Wong ,  D. J. Richard van Nee ,  Vincent K. Jones, IV ,  Geert Arnout Awater

    发明人： Albert van Zelst ,  Brian Wong ,  D. J. Richard van Nee ,  Vincent K. Jones, IV ,  Geert Arnout Awater

    IPC分类号： H04L5/12

    CPC分类号： H04L25/0204 ,  H04L1/0048 ,  H04L1/06 ,  H04L25/0242 ,  H04L25/0246 ,  H04L25/067 ,  H04L27/2601

    摘要： Systems and methodologies are described that provide low-complexity soft-output detection for MIMO communication systems. Looping can be performed over a set of constellation points per spatial stream to obtain distance metrics for each of a series of transmitted streams, for which values for the other transmitted streams can be estimated using a MIMO channel matrix and a sub-optimal MIMO algorithm. Examples of MIMO algorithms that can be utilized include Per-Stream List Detection (PSLD), Lattice-Reduced Detection (LRD), and a Guided-M Algorithm. Performance can be further improved by pre-processing the MIMO channel matrix and/or by utilizing techniques for Enhanced Metric Usage (EMU).

    摘要翻译： 描述了为MIMO通信系统提供低复杂度软输出检测的系统和方法。 可以在每个空间流的一组星座点上执行循环，以获得一系列发射流中的每一个的距离度量，对于其可以使用MIMO信道矩阵和次优MIMO算法来估计其他发送流的值。 可以使用的MIMO算法的示例包括每流列表检测（PSLD），格子减少检测（LRD）和引导M算法。 通过预处理MIMO信道矩阵和/或通过利用用于增强度量使用（EMU）的技术，可以进一步改善性能。

    Detecting the number of transmit antennas in wireless communication systems
    10.
    发明申请
    Detecting the number of transmit antennas in wireless communication systems 有权
    检测无线通信系统中发射天线的数量

    公开(公告)号：US20050271157A1

    公开(公告)日：2005-12-08

    申请号：US11139925

    申请日：2005-05-27

    申请人： Albert van Zelst ,  Vincent Jones ,  D.J. van Nee

    发明人： Albert van Zelst ,  Vincent Jones ,  D.J. van Nee

    IPC分类号： H04J99/00 ,  H03C7/02 ,  H04B1/02 ,  H04B7/02 ,  H04B7/06 ,  H04K1/10 ,  H04L1/02 ,  H04L1/06 ,  H04L12/28 ,  H04L12/56 ,  H04L25/02 ,  H04L27/26 ,  H04W84/12 ,  H04W92/10

    CPC分类号： H04L27/261 ,  H04B7/0671 ,  H04L1/06 ,  H04L1/0618 ,  H04L25/0212 ,  H04L25/0226 ,  H04L27/2613 ,  H04W16/14 ,  H04W24/00 ,  H04W84/12 ,  H04W88/06 ,  H04W99/00

    摘要： To detect the number of transmit antennas, a fast Fourier transform operation is performed on the received samples of the transmitted long training symbols of a preamble. Next, each of the Fourier transformed results is multiplied with the reference frequency-domain representation of the long training symbol so as to remove the effect of the symbols and to maintain the channel information. Next, inverse Fourier transform or least squares operations is performed on the multiplied values to compute channel impulse response. The number of shifted impulse response in the channel impulse response represents the detected number of transmit antennas. Packets containing preambles of the present invention may be received by extended devices as well as by legacy receivers that are not configured to receive and interpret these preambles. The training symbols may be cyclically-shifted and transmitted on different transmit antennas.

    摘要翻译： 为了检测发送天线的数量，对前导码的发送的长训练符号的接收样本执行快速傅里叶变换操作。 接下来，将每个傅立叶变换结果乘以长训练符号的参考频域表示，以便消除符号的影响并维持频道信息。 接下来，对乘法值执行逆傅里叶变换或最小二乘法运算以计算信道脉冲响应。 信道脉冲响应中移位脉冲响应的数量表示检测到的发射天线数。 包含本发明的前导码的分组可以由扩展设备以及未被配置为接收和解释这些前同步码的传统接收机来接收。 训练符号可以循环移位并在不同的发射天线上发射。