公开(公告)号：US20120172054A1

公开(公告)日：2012-07-05

申请号：US13327052

申请日：2011-12-15

申请人： Deric W. WATERS ,  Tarkesh PANDE ,  Jaiganesh BALAKRISHNAN

发明人： Deric W. WATERS ,  Tarkesh PANDE ,  Jaiganesh BALAKRISHNAN

IPC分类号： H04W24/00

CPC分类号： G01S19/46 ,  H04W64/00

摘要： Apparatus and method for cooperatively positioning a mobile wireless device. In one embodiment a mobile wireless device includes a navigation satellite receiver, a WLAN transceiver, and a cooperative positioning system. The navigation satellite receiver is configured to receive positioning signals from positioning satellites. The cooperative positioning system is configured to receive positioning measurements from a cooperating mobile wireless device via the WLAN transceiver. The received positioning measurements are derived from satellite positioning signals received by the cooperating mobile wireless device. The cooperative positioning system is also configured to determine a position of the mobile wireless device based on the positioning measurements received from the cooperating mobile wireless device, positioning measurements provided by the navigation satellite receiver, and a focal measurement that is a function of at least one of the position and the clock bias of both the mobile wireless device and the cooperating mobile wireless device.

摘要翻译： 用于协调地定位移动无线设备的装置和方法。 在一个实施例中，移动无线设备包括导航卫星接收机，WLAN收发器和协作定位系统。 导航卫星接收机被配置为从定位卫星接收定位信号。 协作定位系统被配置为经由WLAN收发器从协作的移动无线设备接收定位测量。 所接收的定位测量值来源于由协作的移动无线设备接收的卫星定位信号。 协作定位系统还被配置为基于从协作的移动无线设备接收的定位测量结果确定移动无线设备的位置，由导航卫星接收机提供的定位测量以及作为至少一个 移动无线设备和协作移动无线设备的位置和时钟偏差。

公开(公告)号：US20120045017A1

公开(公告)日：2012-02-23

申请号：US13286405

申请日：2011-11-01

申请人： Tarkesh Pande ,  Srinath Hosur ,  Anuj Batra

发明人： Tarkesh Pande ,  Srinath Hosur ,  Anuj Batra

IPC分类号： H04L27/00

CPC分类号： H04B7/0417 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/066 ,  H04L5/0023 ,  H04L25/0248 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03802

摘要： Embodiments provide a transform-based method for representing steering matrices in transmit beamforming for a multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system. Beamforming embodiments generate a transform-based representation of steering matrices for at least a subset of sub-carriers for which channel information is known. In some embodiments, a beamformer is able to receive transform matrices information for at least a subset of channel sub-carriers, and generate corresponding channel sub-carrier steering matrices. Some embodiments of a beamformee are able to map at least a subset of channel sub-carrier steering matrices to corresponding transform matrices information prior to transmitting the transform matrix information to a beamformer. Other embodiments of a beamformer are able to receive channel information for at least a subset of sub-carriers of a channel, and compute a transform-based representation of a steering matrix for each sub-carrier for which channel information is known.

摘要翻译： 实施例提供了一种用于表示多输入多输出正交频分复用（MIMO-OFDM）系统的发射波束成形中的导引矩阵的基于变换的方法。 波束形成实施例为已知信道信息的子载波的至少一个子集生成导向矩阵的基于变换的表示。 在一些实施例中，波束形成器能够接收用于信道子载波的至少子集的变换矩阵信息，并且生成相应的信道子载波导引矩阵。 在将变换矩阵信息发送到波束形成器之前，波束形成器的一些实施例能够将信道子载波导引矩阵的至少一个子集映射到对应的变换矩阵信息。 波束形成器的其他实施例能够接收信道的子载波的至少一个子集的信道信息，并且为已知信道信息的每个子载波计算导频矩阵的基于变换的表示。

公开(公告)号：US20110071759A1

公开(公告)日：2011-03-24

申请号：US12887458

申请日：2010-09-21

申请人： Tarkesh Pande ,  Goutam Dutta ,  Deric Waters

发明人： Tarkesh Pande ,  Goutam Dutta ,  Deric Waters

IPC分类号： G01C21/00

CPC分类号： G01C21/165 ,  G01S19/34

摘要： A system and method for controlling a navigation receiver is disclosed. A current position is determined using the navigation receiver and then the navigation receiver is placed in a power-save mode. The current position is updated using information from position sensors. The navigation receiver is temporarily placed in an active mode at intervals to determine an intermediate position. The current position is also updated using the intermediate position. The navigation receiver may be a GNSS receiver, a cellular receiver, a WiFi receiver, or another position-fixing device. The position sensors may be accelerometers, gyroscopes, electronic compasses or mapping data. A power-save controller controls the power-save or active mode of the navigation receiver. A sensor conditioning circuit pre-processes the data from the position sensors before providing the data to the power-save controller. During the power-save mode, an RF subsystem and/or a baseband subsystem of the navigation receiver may be turned off.

摘要翻译： 公开了一种用于控制导航接收机的系统和方法。 使用导航接收器确定当前位置，然后将导航接收机置于省​​电模式。 使用位置传感器的信息更新当前位置。 导航接收器被间隔地暂时置于活动模式以确定中间位置。 当前位置也使用中间位置更新。 导航接收器可以是GNSS接收器，蜂窝接收器，WiFi接收器或另一定位装置。 位置传感器可以是加速度计，陀螺仪，电子罗盘或映射数据。 节电控制器控制导航接收器的省电或主动模式。 传感器调节电路在将数据提供给节电控制器之前对位置传感器的数据进行预处理。 在省电模式期间，可以关闭导航接收器的RF子系统和/或基带子系统。

公开(公告)号：US20100067604A1

公开(公告)日：2010-03-18

申请号：US12561990

申请日：2009-09-17

申请人： Sandeep Bhadra ,  Ramanuja Vedantham ,  Shantanu Kangude ,  Eko N. Onggosanusi ,  Anand G. Dabak ,  Badri N. Varadarajan ,  Runhua Chen ,  Tarkesh Pande

发明人： Sandeep Bhadra ,  Ramanuja Vedantham ,  Shantanu Kangude ,  Eko N. Onggosanusi ,  Anand G. Dabak ,  Badri N. Varadarajan ,  Runhua Chen ,  Tarkesh Pande

IPC分类号： H04B7/02

CPC分类号： H04B7/024

摘要： A coordinated multipoint transmitter is for use with a multiple antenna super-cell and includes primary and secondary base stations jointly connected via an X2 interface link, wherein the primary base station provides a transmission directive corresponding to an X2 interface protocol over the X2 interface link to the secondary base station for a joint transmission from the primary and secondary base stations.

摘要翻译： 协调的多点发射机用于多天线超小区，并且包括通过X2接口链路共同连接的主基站和次基站，其中主基站通过X2接口链路提供对应于X2接口协议的传输指令， 用于从一级和二级基站的联合传输的二级基站。