公开(公告)号：US20130051446A1

公开(公告)日：2013-02-28

申请号：US13593159

申请日：2012-08-23

Applicant: Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande ,  Il Han Kim

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande ,  Il Han Kim

IPC: H04L12/26 ,  H04B3/54

CPC classification number: H04B3/54 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/542 ,  H04B2203/5466

Abstract: Phase detection between service nodes in a as “PRIME” (“PoweRline Intelligent Metering Evolution”) communications network, in which the service nodes are connected to one phase of a three-phase power distribution network. A service node joining a sub-network receives packet data units from other service nodes in the sub-network, including those that can potentially serve as a switch node to which the joining service node can register. The joining service node measures an elapsed time between a zero crossing of the AC power waveform at its phase and the start of a frame in the received packet data units. This elapsed time is compared with a similar zero crossing gap communicated by other service nodes in the packet data units, to identify the relative phases to which the two service nodes are connected.

Abstract translation: 作为PRIME（PoweRline智能计量演进）通信网络中的服务节点之间的相位检测，其中服务节点连接到三相配电网络的一相。 加入子网络的服务节点从子网络中的其他服务节点接收分组数据单元，包括可能充当加入服务节点可以注册的交换节点的那些节点。 加入服务节点测量在其相位处的AC功率波形的过零点与接收的分组数据单元中的帧的开始之间的经过时间。 将经过的时间与由分组数据单元中的其他服务节点通信的类似的零交叉间隔进行比较，以识别两个服务节点所连接的相对阶段。

公开(公告)号：US20130041610A1

公开(公告)日：2013-02-14

申请号：US13571501

申请日：2012-08-10

Applicant: Deric Wayne WATERS ,  Tarkesh Pande

Inventor： Deric Wayne WATERS ,  Tarkesh Pande

IPC: G06F17/00 ,  G01C17/38 ,  G06F15/00

CPC classification number: G01C17/38 ,  G01C5/06 ,  G01C17/02 ,  G01P15/00 ,  G06F17/30879 ,  G06K7/10792 ,  G06K7/1417 ,  G06K19/06037

Abstract: Visual codes are scanned to assist navigation. The visual code may be a Quick Response (QR) code that contains information useful to calibrating a variety of navigation-based sensors such as gyroscopes, e-compasses, and barometric pressure sensors.

Abstract translation: 扫描视觉代码以辅助导航。 视觉代码可以是快速响应（QR）代码，其包含用于校准各种基于导航的传感器（例如陀螺仪，电子罗盘和大气压力传感器）的信息。

公开(公告)号：US20120320996A1

公开(公告)日：2012-12-20

申请号：US13526227

申请日：2012-06-18

Applicant: ANAND G. DABAK ,  TARKESH PANDE ,  IL HAN KIM ,  RAMANUJA VEDANTHAM ,  KUMARAN VIJAYASANKAR ,  GANG XU

Inventor： ANAND G. DABAK ,  TARKESH PANDE ,  IL HAN KIM ,  RAMANUJA VEDANTHAM ,  KUMARAN VIJAYASANKAR ,  GANG XU

IPC: H04B3/00

CPC classification number: H04B3/54 ,  H04B2203/5416 ,  H04B2203/5425 ,  H04B2203/5495

Abstract: A method of powerline communications between a plurality of nodes on a powerline communications (PLC) channel including a first node and a second node. At least one communication quality measure is determined for the PLC channel. Based on the communication quality measure, a preamble of a data frame is dynamically switched between a reference preamble having a reference symbol length including a reference number of syncP symbols and a reference number of syncM symbols and at least a first extended preamble having an extended symbol length that is greater than (>) the reference symbol length. The data frame is then transmitted on the PLC channel.

Abstract translation: 一种在包括第一节点和第二节点的电力线通信（PLC）信道上的多个节点之间的电力线通信的方法。 为PLC通道确定至少一个通信质量度量。 基于通信质量测量，在具有包括参考数量的syncP符号的参考符号长度和参考数量的syncM符号的参考前同步码和至少具有扩展符号的第一扩展前同步码之间动态地切换数据帧的前导码 长度大于（>）参考符号长度。 然后在PLC通道上传输数据帧。

公开(公告)号：US08233556B2

公开(公告)日：2012-07-31

申请号：US11776215

申请日：2007-07-11

Applicant: Deric W. Waters ,  Tarkesh Pande ,  Anuj Batra

Inventor： Deric W. Waters ,  Tarkesh Pande ,  Anuj Batra

IPC: H04K1/10

CPC classification number: H04B7/0617 ,  H01Q3/2605 ,  H04B7/0417 ,  H04B7/0634 ,  H04B7/0663 ,  H04L1/06

Abstract: A method and system for reduced feedback transmit beamforming computes a matrix of channel transfer function coefficients. The matrix of channel transfer function coefficients is compressed by applying a rotation matrix having orthogonal columns to the matrix of channel transfer function coefficients to produce a compressed transfer function matrix having a reduced number of non-zero coefficients. The compressed matrix is fed back to a transmitting unit. Decompression of the transfer function coefficient matrix is not required. This compression does not cause any performance degradation for transmit beamforming. The transmitting unit computes a set of beamsteering coefficients from the compressed matrix and applies the coefficients to signals prior to transmission. The beamformed signals are transmitted to the receiving unit and post-coded to allow the receiving unit to see an effective diagonalized channel.

Abstract translation: 用于减少反馈传输波束成形的方法和系统计算信道传递函数系数的矩阵。 通过将具有正交列的旋转矩阵应用于信道传递函数系数的矩阵来压缩信道传递函数系数的矩阵，以产生具有减少的非零系数数的压缩传递函数矩阵。 压缩矩阵被反馈到发送单元。 不要求传递函数系数矩阵的解压缩。 这种压缩不会对发射波束成形造成任何性能下降。 发送单元从压缩矩阵计算一组波束导向系数，并将该系数应用于发送之前的信号。 波束形成的信号被发送到接收单元并进行后编码以允许接收单元看到有效的对角化信道。

公开(公告)号：US20110250931A1

公开(公告)日：2011-10-13

申请号：US13078748

申请日：2011-04-01

Applicant: Tarkesh Pande ,  Jaiganesh Balakrishnan ,  Deric Waters ,  Goutam Dutta ,  Jayawardan Janardhanan ,  Sthanunathan Ramakrishnan ,  Sandeep Rao ,  Karthik Ramasubramanian

Inventor： Tarkesh Pande ,  Jaiganesh Balakrishnan ,  Deric Waters ,  Goutam Dutta ,  Jayawardan Janardhanan ,  Sthanunathan Ramakrishnan ,  Sandeep Rao ,  Karthik Ramasubramanian

IPC: G01C21/00 ,  G01S1/08 ,  H04W88/02 ,  G01S1/02

CPC classification number: G01S19/47 ,  G01C21/165

Abstract: A personal navigation device configured to determine heading readings continuously using data from a sensor in the personal navigation device. Heading readings are selected corresponding to a periodic event. A representative heading is determined from the selected heading readings. When a portion of the selected heading readings has a value within a range of the representative heading, a static heading indicator is asserted to indicate the personal navigation device is moving in a static heading. The static heading indicator may be used to smooth an estimated trajectory of the personal navigation device.

Abstract translation: 一种个人导航装置，被配置为使用来自个人导航装置中的传感器的数据连续地确定航向读数。 根据周期性事件选择标题读数。 从所选标题读数确定代表性标题。 当所选航标读数的一部分具有在代表性标题的范围内的值时，断言静态航向指示符以指示个人导航设备正在静态航向中移动。 静态航向指示符可以用于平滑个人导航设备的估计轨迹。

公开(公告)号：US20100271261A1

公开(公告)日：2010-10-28

申请号：US12767958

申请日：2010-04-27

Applicant: Deric Wayne Waters ,  Tarkesh Pande

Inventor： Deric Wayne Waters ,  Tarkesh Pande

IPC: G01S19/37

CPC classification number: G01S19/36 ,  G01S19/24 ,  H01Q3/12

Abstract: Embodiments of the invention provide a system and method to improve the performance of a GNSS receiver using antenna switching. The system has a plurality of antennas and at least one radio frequency RF chain. There are fewer RF chain(s) than antennas. A receiver processes a plurality of signals sent by a plurality of transmitters. The system also includes antenna switches and switch controller. The method includes processing signals from a plurality of satellite vehicles SVs using an antenna selected from a plurality of antennas.

Abstract translation: 本发明的实施例提供了一种使用天线切换来提高GNSS接收机的性能的系统和方法。 该系统具有多个天线和至少一个射频RF链。 射频链比天线少。 接收机处理由多个发射机发送的多个信号。 该系统还包括天线开关和开关控制器。 该方法包括使用从多个天线中选择的天线处理来自多个卫星载波SV的信号。

公开(公告)号：US20080187061A1

公开(公告)日：2008-08-07

申请号：US12024064

申请日：2008-01-31

Applicant: Tarkesh PANDE ,  Srinath HOSUR ,  Anuj BATRA ,  Deric W. WATERS

Inventor： Tarkesh PANDE ,  Srinath HOSUR ,  Anuj BATRA ,  Deric W. WATERS

IPC: H04L27/28

CPC classification number: H04B7/043 ,  H04L25/0204 ,  H04L27/2626

Abstract: Embodiments provide a system and method for reconstructing steering matrices in a MIMO-OFDM (multiple-input multiple-output orthogonal frequency division multiplexing) system by interpolating steering matrices in transmit beamforming. The reconstructed steering matrices provide a faithful representation to the actual steering matrices. Embodiments receive channel information for a subset of sub-carriers of a channel, interpolate the channel information for the subset of sub-carriers to obtain at least one Givens rotation angle for remaining sub-carriers of the channel which are not members of the subset, and reconstruct missing steering matrices from the interpolated angles.

Abstract translation: 实施例提供了一种通过在发射波束形成中内插导引矩阵来重构MIMO-OFDM（多输入多输出正交频分复用）系统中的导向矩阵的系统和方法。 重建的导向矩阵为实际的导向矩阵提供忠实的表示。 实施例接收信道的子载波的子集的信道信息，内插用于子载波子集的信道信息，以获得不是子集的成员的信道的剩余子载波的至少一个Givens旋转角， 并从内插角度重建失踪导向矩阵。

公开(公告)号：US08958464B2

公开(公告)日：2015-02-17

申请号：US13493268

申请日：2012-06-11

Applicant: Ramanuja Vedantham ,  Anand G. Dabak ,  Tarkesh Pande ,  Il Han Kim ,  Kumaran Vijayasankar

Inventor： Ramanuja Vedantham ,  Anand G. Dabak ,  Tarkesh Pande ,  Il Han Kim ,  Kumaran Vijayasankar

IPC: H04B1/38 ,  H04B3/54 ,  H04L5/00 ,  H04L27/26

CPC classification number: H04B3/542 ,  H04B2203/5408 ,  H04B2203/5445 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0094 ,  H04L27/2602 ,  H04L27/2613 ,  H04L27/2666 ,  H04L69/22

Abstract: A method of powerline communications (PLC) includes compiling a data frame for physical layer (PHY) by a first communications device at a first communications node on a powerline of a PLC network. The data frame includes a single tone PHY header portion and a data payload portion in a set of tones including at least one tone having a frequency different from a frequency of the single tone. The PHY header portion includes tone mask identification information identifying the set of tones. The first communications device transmits the data frame over the powerline to a second communications device at a second communications node on the powerline. The second communications device receives the data frame, and decodes the data payload using the tone mask identification information in the PHY header portion.

Abstract translation: 电力线通信（PLC）的方法包括在PLC网络的电力线上的第一通信节点处由第一通信设备编译用于物理层（PHY）的数据帧。 数据帧包括一组音调中的单音PHY头部部分和数据有效载荷部分，包括具有与单音频率不同的频率的至少一个音调。 PHY报头部分包括识别该组音调的色调掩码识别信息。 第一通信设备通过电力线将数据帧发送到电力线上的第二通信节点处的第二通信设备。 第二通信设备接收数据帧，并使用PHY报头部分中的色调掩码识别信息解码数据有效载荷。

公开(公告)号：US08792567B2

公开(公告)日：2014-07-29

申请号：US13526227

申请日：2012-06-18

Applicant: Anand G. Dabak ,  Tarkesh Pande ,  Il Han Kim ,  Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Gang Xu

Inventor： Anand G. Dabak ,  Tarkesh Pande ,  Il Han Kim ,  Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Gang Xu

IPC: H04B3/00

CPC classification number: H04B3/54 ,  H04B2203/5416 ,  H04B2203/5425 ,  H04B2203/5495

Abstract: A method of powerline communications between a plurality of nodes on a powerline communications (PLC) channel including a first node and a second node. At least one communication quality measure is determined for the PLC channel. Based on the communication quality measure, a preamble of a data frame is dynamically switched between a reference preamble having a reference symbol length including a reference number of syncP symbols and a reference number of syncM symbols and at least a first extended preamble having an extended symbol length that is greater than (>) the reference symbol length. The data frame is then transmitted on the PLC channel.

Abstract translation: 一种在包括第一节点和第二节点的电力线通信（PLC）信道上的多个节点之间的电力线通信的方法。 为PLC通道确定至少一个通信质量度量。 基于通信质量测量，在具有包括参考数量的syncP符号的参考符号长度和参考数量的syncM符号的参考前同步码和至少具有扩展符号的第一扩展前同步码之间动态地切换数据帧的前导码 长度大于（>）参考符号长度。 然后在PLC通道上传输数据帧。

公开(公告)号：US08755453B2

公开(公告)日：2014-06-17

申请号：US12326878

申请日：2008-12-02

Applicant: Badri Varadarajan ,  Anand G. Dabak ,  Tarkesh Pande ,  Eko N. Onggosanusi

Inventor： Badri Varadarajan ,  Anand G. Dabak ,  Tarkesh Pande ,  Eko N. Onggosanusi

IPC: H04L27/00

CPC classification number: H04L5/0048 ,  H04B1/04 ,  H04L23/02 ,  H04L25/0202 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2649

Abstract: In one embodiment, a transmitter includes a binary sequence generator unit configured to provide a sequence of reference signal bits, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to the transmitter and one or more time indices of the sequence. The transmitter also include a mapping unit that transforms the sequence of reference signal bits into a complex reference signal, and a transmit unit configured to transmit the complex reference signal. In another embodiment, a receiver includes a receive unit configured to receive a complex reference signal and a reference signal decoder unit configured to detect a sequence of reference signal bits from the complex reference signal, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to a transmitter and one or more time indices of the sequence.

Abstract translation: 在一个实施例中，发射机包括被配置为提供参考信号比特序列的二进制序列发生器单元，其中该序列是小区识别参数的不可分离的功能，对应于发射机的循环前缀模式和一个或多个时间指数 序列。 发射机还包括将参考信号比特序列变换为复参考信号的映射单元，以及配置成发送复基准信号的发射单元。 在另一实施例中，接收机包括被配置为接收复参考信号的接收单元和被配置为从复参考信号检测参考信号位序列的参考信号解码器单元，其中该序列是小区识别参数的不可分离的函数 ，对应于发射机的循环前缀模式和序列的一个或多个时间索引。