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    Signaling methods for MMSE precoding with eigenmode selection
    1.
    发明授权
    Signaling methods for MMSE precoding with eigenmode selection 有权
    用于本征模式选择的MMSE预编码的信令方法

    公开(公告)号：US08363587B2

    公开(公告)日：2013-01-29

    申请号：US12408938

    申请日：2009-03-23

    申请人： Simone Merlin ,  Hemanth Sampath ,  Santosh Abraham ,  Alok Aggarwal ,  Vinay Sridhara ,  Sameer Vermani

    发明人： Simone Merlin ,  Hemanth Sampath ,  Santosh Abraham ,  Alok Aggarwal ,  Vinay Sridhara ,  Sameer Vermani

    IPC分类号： H04H20/71

    CPC分类号： H04B7/065 ,  H04B7/0417 ,  H04B7/0434

    摘要： Different methods of signaling between an access point and user terminals in a multiuser wireless system for performing a minimum mean square error (MMSE) precoding at the access point preceded with eigenmode selection are provided. For one embodiment of the present disclosure, a compact feedback may be utilized between a plurality of user terminals and the access point. For another embodiment of the present disclosure, a hybrid feedback may be utilized between the plurality of user terminals and the access point. For yet another embodiment of the present disclosure, a full feedback may be utilized between the plurality of user terminals and the access point.

    摘要翻译： 提供了在多用户无线系统中的接入点和用户终端之间用于在本征模式选择之前的接入点执行最小均方误差（MMSE）预编码的不同的信令方法。 对于本公开的一个实施例，可以在多个用户终端和接入点之间使用紧凑的反馈。 对于本公开的另一实施例，可以在多个用户终端和接入点之间使用混合反馈。 对于本公开的另一个实施例，可以在多个用户终端和接入点之间使用完全反馈。

    METHOD FOR RANGING DEVICES USING CODE SEQUENCES IN WLANs
    2.
    发明申请
    METHOD FOR RANGING DEVICES USING CODE SEQUENCES IN WLANs 有权
    使用WLAN中的代码序列来定位设备的方法

    公开(公告)号：US20100046491A1

    公开(公告)日：2010-02-25

    申请号：US12365791

    申请日：2009-02-04

    申请人： Sameer Vermani ,  Hemanth Sampath ,  Alok Aggarwal ,  Simone Merlin

    发明人： Sameer Vermani ,  Hemanth Sampath ,  Alok Aggarwal ,  Simone Merlin

    IPC分类号： H04B7/216 ,  H04L27/28

    CPC分类号： H04L5/0007 ,  H04J3/0682 ,  H04J11/00 ,  H04J13/0048 ,  H04L27/2655 ,  H04W56/0005

    摘要： Methods and apparatus for using code-division multiple access (CDMA) to transmit information via orthogonal frequency-division multiplexing (OFDM) to convey information from user terminals to an access point (AP) in a wireless local area network (WLAN) are provided. By using CDMA to convey information, a propagation delay between an access point (AP) and a user terminal may be determined by the AP, and timing adjustment information based on the delay may be sent to the user terminal. In this manner, subsequent uplink (UL) transmissions from multiple user terminals may be received simultaneously by the AP, despite the multiple user terminals having potentially different propagation delays.

    摘要翻译： 提供了使用码分多址（CDMA）通过正交频分复用（OFDM）发送信息以将信息从用户终端传送到无线局域网（WLAN）中的接入点（AP）的方法和装置。 通过使用CDMA来传送信息，可以由AP确定接入点（AP）和用户终端之间的传播延迟，并且可以将基于延迟的定时调整信息发送到用户终端。 以这种方式，尽管多个用户终端具有潜在的不同传播延迟，但是可以由AP同时接收来自多个用户终端的后续上行链路（UL）传输。

    Method for ranging devices using code sequences in WLANs
    3.
    发明授权
    Method for ranging devices using code sequences in WLANs 有权
    WLAN中使用码序列的测距设备的方法

    公开(公告)号：US08743863B2

    公开(公告)日：2014-06-03

    申请号：US12365791

    申请日：2009-02-04

    申请人： Sameer Vermani ,  Hemanth Sampath ,  Alok Aggarwal ,  Simone Merlin

    发明人： Sameer Vermani ,  Hemanth Sampath ,  Alok Aggarwal ,  Simone Merlin

    IPC分类号： H04J3/06 ,  H04J11/00

    CPC分类号： H04L5/0007 ,  H04J3/0682 ,  H04J11/00 ,  H04J13/0048 ,  H04L27/2655 ,  H04W56/0005

    摘要： Methods and apparatus for using code-division multiple access (CDMA) to transmit information via orthogonal frequency-division multiplexing (OFDM) to convey information from user terminals to an access point (AP) in a wireless local area network (WLAN) are provided. By using CDMA to convey information, a propagation delay between an access point (AP) and a user terminal may be determined by the AP, and timing adjustment information based on the delay may be sent to the user terminal. In this manner, subsequent uplink (UL) transmissions from multiple user terminals may be received simultaneously by the AP, despite the multiple user terminals having potentially different propagation delays.

    摘要翻译： 提供了使用码分多址（CDMA）通过正交频分复用（OFDM）发送信息以将信息从用户终端传送到无线局域网（WLAN）中的接入点（AP）的方法和装置。 通过使用CDMA来传送信息，可以由AP确定接入点（AP）和用户终端之间的传播延迟，并且可以将基于延迟的定时调整信息发送到用户终端。 以这种方式，尽管多个用户终端具有潜在的不同传播延迟，但是可以由AP同时接收来自多个用户终端的后续上行链路（UL）传输。

    SIGNALING METHODS FOR MMSE PRECODING WITH EIGENMODE SELECTION
    4.
    发明申请
    SIGNALING METHODS FOR MMSE PRECODING WITH EIGENMODE SELECTION 有权
    用于MMSE预编码与信号选择的信令方法

    公开(公告)号：US20100238912A1

    公开(公告)日：2010-09-23

    申请号：US12408938

    申请日：2009-03-23

    申请人： Simone Merlin ,  Hemanth Sampath ,  Santosh Abraham ,  Alok Aggarwal ,  Vinay Sridhara ,  Sameer Vermani

    发明人： Simone Merlin ,  Hemanth Sampath ,  Santosh Abraham ,  Alok Aggarwal ,  Vinay Sridhara ,  Sameer Vermani

    IPC分类号： H04W4/00 ,  H04B7/00

    CPC分类号： H04B7/065 ,  H04B7/0417 ,  H04B7/0434

    摘要： Different methods of signaling between an access point and user terminals in a multiuser wireless system for performing a minimum mean square error (MMSE) precoding at the access point preceded with eigenmode selection are provided. For one embodiment of the present disclosure, a compact feedback may be utilized between a plurality of user terminals and the access point. For another embodiment of the present disclosure, a hybrid feedback may be utilized between the plurality of user terminals and the access point. For yet another embodiment of the present disclosure, a full feedback may be utilized between the plurality of user terminals and the access point.

    摘要翻译： 提供了在多用户无线系统中的接入点和用户终端之间用于在本征模式选择之前的接入点执行最小均方误差（MMSE）预编码的不同的信令方法。 对于本公开的一个实施例，可以在多个用户终端和接入点之间使用紧凑的反馈。 对于本公开的另一实施例，可以在多个用户终端和接入点之间使用混合反馈。 对于本公开的另一个实施例，可以在多个用户终端和接入点之间使用完全反馈。

    Scheduling algorithms for multi-user (MU) multiple-input multiple-output (MIMO) communication systems
    5.
    发明授权
    Scheduling algorithms for multi-user (MU) multiple-input multiple-output (MIMO) communication systems 有权
    多用户（MU）多输入多输出（MIMO）通信系统的调度算法

    公开(公告)号：US09184810B2

    公开(公告)日：2015-11-10

    申请号：US13465522

    申请日：2012-05-07

    申请人： Zhi Quan ,  Simone Merlin ,  Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath

    发明人： Zhi Quan ,  Simone Merlin ,  Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath

    IPC分类号： H04W4/00 ,  H04B7/04 ,  H04W72/12

    CPC分类号： H04B7/0452 ,  H04W72/12 ,  H04W72/1221

    摘要： A method is provided for wirelessly transmitting from a transmitter to one or more receivers within a multi-user (MU) multiple-input and multiple-output (MIMO) communication system. A number of concurrent (spatial) streams are dynamically allocated in a MU-MIMO transmission to each of a plurality of served receivers to maximize total data transmitted on each transmission. Streams are allocated according to a corresponding transmission queue length for each receiver and the number of receive antennas used by each of the served receivers. A transmission timer is started upon sending the transmission. A random backoff counter is also started upon one of either: (a) expiration of the transmission timer or (b) receipt of data at a transmission queue. A new transmission is sent upon expiration of the random backoff counter if the transmission timer has expired. Otherwise, the random backoff counter is restarted one or more times until the transmission timer has expired.

    摘要翻译： 提供了一种用于从多用户（MU）多输入（MIMO）通信系统中的发射机向一个或多个接收机进行无线发射的方法。 在MU-MIMO传输中动态地将多个并行（空间）流分配给多个服务接收机中的每一个，以最大化在每个传输上传输的总数据。 流根据每个接收机的相应传输队列长度和每个被服务接收机使用的接收天线的数量来分配。 传送定时器在发送传输时开始。 以下之一也开始随机退避计数器：（a）传输定时器到期或（b）在传输队列处接收数据。 如果发送定时器已经到期，则在随机退避计数器到期时发送新的传输。 否则，随机退避计数器重新启动一次或多次，直到传输定时器到期。

    PACKET-LEVEL ERASURE PROTECTION CODING IN AGGREGATED PACKET TRANSMISSIONS
    6.
    发明申请
    PACKET-LEVEL ERASURE PROTECTION CODING IN AGGREGATED PACKET TRANSMISSIONS 有权
    分组级保护编码在分组分组传输中的应用

    公开(公告)号：US20120117446A1

    公开(公告)日：2012-05-10

    申请号：US13043259

    申请日：2011-03-08

    申请人： Mohammad Hossein Taghavi Nasrabadi ,  Hemanth Sampath ,  Simone Merlin ,  Santosh P. Abraham ,  Sameer Vermani ,  Rahul Tandra

    发明人： Mohammad Hossein Taghavi Nasrabadi ,  Hemanth Sampath ,  Simone Merlin ,  Santosh P. Abraham ,  Sameer Vermani ,  Rahul Tandra

    IPC分类号： H03M13/05 ,  G06F11/10

    CPC分类号： H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/0041 ,  H04L1/0057 ,  H04L1/0065 ,  H04L1/008 ,  H04L1/1819 ,  Y02D50/10

    摘要： In a first aspect, an aggregated packet (A-MPDU) includes packets (MPDUs) and EC-Blocks (Error Correction Blocks) containing error correction coding information. A transmitter uses a Fountain coding scheme (for example, Raptor or RaptorQ) to generate the error correction coding information from the MPDUs. If a receiver detects an error in a received MPDU, then the receiver uses the error correction coding information from the EC-Blocks to correct the error. In a second novel aspect, a determination is made as to whether a change in error rate is more likely due to collisions or to a low SNR. If the determination is that the change is due to collisions then the MCS index is adjusted to restore a target error rate, whereas if the determination is that the change is due to a low SNR then the number of EC-Blocks per A-MPDU is adjusted to restore the target error rate.

    摘要翻译： 在第一方面，聚合分组（A-MPDU）包括包含纠错编码信息的分组（MPDU）和EC-块（纠错块）。 发射机使用喷泉编码方案（例如，Raptor或RaptorQ）从MPDU生成纠错编码信息。 如果接收机检测到接收到的MPDU中的错误，则接收机使用来自EC-Block的纠错编码信息来校正错误。 在第二个新颖的方面，确定误差率的变化是否更可能是由于冲突或低SNR。 如果确定改变是由于冲突，则MCS索引被调整以恢复目标错误率，而如果确定改变是由于低SNR，则每个A-MPDU的EC块的数量是 调整以恢复目标错误率。

    PRECODING TECHNIQUE FOR MULTIUSER MIMO BASED ON EIGENMODE SELECTION AND MMSE
    7.
    发明申请
    PRECODING TECHNIQUE FOR MULTIUSER MIMO BASED ON EIGENMODE SELECTION AND MMSE 有权
    基于EIGENMODE选择和MMSE的多播MIMO的预测技术

    公开(公告)号：US20100232352A1

    公开(公告)日：2010-09-16

    申请号：US12401506

    申请日：2009-03-10

    申请人： Simone Merlin ,  Hemanth Sampath ,  Sameer Vermani ,  Richard van Nee

    发明人： Simone Merlin ,  Hemanth Sampath ,  Sameer Vermani ,  Richard van Nee

    IPC分类号： H04W72/04 ,  H04B7/02

    CPC分类号： H04B7/0634 ,  H04B7/0417

    摘要： The present disclosure proposes a method for preceding of a transmission signal at an access point of a multiuser system based on eigenmode selection and minimum mean square error (MMSE) processing. The most reliable eigenmodes of every multiple-input multiple-output (MIMO) channel in the system can be selected at each user terminal and corresponding eigenvalues and eigenvectors can be fed back to the access point. The linear MMSE precoding (beamforming) applied at the access point based on the selected eigenmodes may provide an improved transmission capacity performance compare to techniques from the prior art.

    摘要翻译： 本公开提出了一种基于本征模式选择和最小均方误差（MMSE）处理在多用户系统的接入点处发送信号之前的方法。 可以在每个用户终端选择系统中每个多输入多输出（MIMO）信道的最可靠的本征模，并且可以将对应的特征值和特征向量反馈到接入点。 基于所选择的本征模式在接入点应用的线性MMSE预编码（波束成形）可以提供与来自现有技术的技术相比改进的传输容量性能。