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1. 发明授权

US08023577B2 Systems and methods for efficient channel classification 有权
标题翻译：高效渠道分类的系统和方法
公开(公告)号：US08023577B2
公开(公告)日：2011-09-20
申请号：US12024029
申请日：2008-01-31
申请人： Tarkesh Pande , Deric W. Waters , Srinath Hosur , Anuj Batra
发明人： Tarkesh Pande , Deric W. Waters , Srinath Hosur , Anuj Batra
IPC分类号： H04B17/00 , H04B3/46 , H04Q1/20
CPC分类号： H04L25/0204 , H04B7/0417 , H04B7/066 , H04L2025/03426
摘要： Embodiments provide a system and method for efficiently classifying different channel types in an orthogonal frequency division multiplexing (OFDM) system. Embodiments quantify the frequency selectivity in a channel by measuring the variation in a particular channel statistic across sub-carriers in an OFDM system, involve minimal complexity in implementation, and can be used in a variety of scenarios. One embodiment is a method for classifying channels in an OFDM system, comprising measuring variation of at least one channel statistic across sub-carriers, quantifying the variation to determine a measurement value, and applying the measurement value to at least one threshold to classify the channel.
摘要翻译：实施例提供了一种用于在正交频分复用（OFDM）系统中有效地分类不同信道类型的系统和方法。实施例通过测量OFDM系统中跨子载波的特定信道统计量的变化来量化信道中的频率选择性，涉及实现中的最小复杂度，并且可以用于各种情况。一个实施例是一种用于对OFDM系统中的信道进行分类的方法，包括测量跨越子载波的至少一个信道统计量的变化，量化变化以确定测量值，以及将测量值应用于至少一个阈值以对信道进行分类。

2. 发明申请

US20080019457A1 REDUCED FEEDBACK TRANSMIT BEAMFORMING 有权
标题翻译：减少反馈发射波束
公开(公告)号：US20080019457A1
公开(公告)日：2008-01-24
申请号：US11776215
申请日：2007-07-11
申请人： Deric W. Waters , Tarkesh Pande , Anuj Batra
发明人： Deric W. Waters , Tarkesh Pande , Anuj Batra
IPC分类号： H04K1/10
CPC分类号： H04B7/0617 , H01Q3/2605 , H04B7/0417 , H04B7/0634 , H04B7/0663 , H04L1/06
摘要： A method and system for reduced feedback transmit beamforming are provided. Some embodiments comprise computing 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.
摘要翻译：提供了一种用于减少反馈传输波束形成的方法和系统。一些实施例包括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。

3. 发明授权

US08233556B2 Reduced feedback transmit beamforming 有权
标题翻译：减少反馈传输波束成形
公开(公告)号：US08233556B2
公开(公告)日：2012-07-31
申请号：US11776215
申请日：2007-07-11
申请人： Deric W. Waters , Tarkesh Pande , Anuj Batra
发明人： Deric W. Waters , Tarkesh Pande , Anuj Batra
IPC分类号： H04K1/10
CPC分类号： H04B7/0617 , H01Q3/2605 , H04B7/0417 , H04B7/0634 , H04B7/0663 , H04L1/06
摘要： 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.
摘要翻译：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。

4. 发明申请

US20080212461A1 TRANSFORM-BASED SYSTEMS AND METHODS FOR RECONSTRUCTING STEERING MATRICES IN A MIMO-OFDM SYSTEM 审中-公开
标题翻译：基于变换的系统和用于重构MIMO-OFDM系统中的转向矩阵的方法
公开(公告)号：US20080212461A1
公开(公告)日：2008-09-04
申请号：US12040750
申请日：2008-02-29
申请人： Tarkesh Pande , Srinath Hosur , Anuj Batra
发明人： Tarkesh Pande , Srinath Hosur , Anuj Batra
IPC分类号： H04J11/00
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。

5. 发明申请

US20120045017A1 TRANSFORM-BASED SYSTEMS AND METHODS FOR RECONSTRUCTING STEERING MATRICES IN A MIMO-OFDM SYSTEM 审中-公开
标题翻译：基于变换的系统和用于重构MIMO-OFDM系统中的转向矩阵的方法
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。

6. 发明授权

US09030356B2 Positioning system receiver sensor system coupled with measurement data output 有权
标题翻译：定位系统接收机传感器系统与测量数据输出相结合
公开(公告)号：US09030356B2
公开(公告)日：2015-05-12
申请号：US13163199
申请日：2011-06-17
申请人： Goutam Dutta , Tarkesh Pande , Sandeep Rao , Deric W. Waters
发明人： Goutam Dutta , Tarkesh Pande , Sandeep Rao , Deric W. Waters
IPC分类号： G01S19/47 , G01C21/16
CPC分类号： G01S19/47 , G01C21/165 , G01S19/20 , G01S19/49 , G01S19/52
摘要： Embodiments of the disclosure provide a cross coupled position engine architecture for sensor integration in a Global Navigation Satellite System. In one embodiment, a data processing engine for processing inertial sensor data within a positioning system receiver is disclosed. The data processing engine includes a first input for receiving the sensor data, and a second input for receiving a positioning data. The data processing system also includes a memory and a processor. The processor of the data processing system is coupled to the memory and to the first and second input. The processor of the data processing system is configured to calculate a net acceleration profile data from the inertial sensor data and from the positioning data. The net acceleration profile data calculated by the processor of the data processing system is used for the Global Positioning System (GPS) receiver to subsequently calculate a position and a velocity data.
摘要翻译：本公开的实施例提供了用于全球导航卫星系统中的传感器集成的交叉耦合位置引擎结构。在一个实施例中，公开了一种用于在定位系统接收器内处理惯性传感器数据的数据处理引擎。数据处理引擎包括用于接收传感器数据的第一输入端和用于接收定位数据的第二输入端。数据处理系统还包括存储器和处理器。数据处理系统的处理器耦合到存储器和第一和第二输入端。数据处理系统的处理器被配置为从惯性传感器数据和定位数据计算净加速度曲线数据。由数据处理系统的处理器计算的净加速度曲线数据用于全球定位系统（GPS）接收机，以随后计算位置和速度数据。

7. 发明授权

US08924155B2 System and method for access point based positioning 有权
标题翻译：基于接入点定位的系统和方法
公开(公告)号：US08924155B2
公开(公告)日：2014-12-30
申请号：US13230512
申请日：2011-09-12
申请人： Deric W. Waters , Sthanunathan Ramakrishnan , Ariton E. Xhafa , Jaiganesh Balakrishnan , Tarkesh Pande , Sandeep Kasargod , Saket Thukral
发明人： Deric W. Waters , Sthanunathan Ramakrishnan , Ariton E. Xhafa , Jaiganesh Balakrishnan , Tarkesh Pande , Sandeep Kasargod , Saket Thukral
IPC分类号： G01C21/00 , G01S5/02 , H04W64/00
CPC分类号： G01S5/0242 , H04W64/00
摘要： Apparatus and methods for scanning for access points (APs) for wireless local area network (WLAN) positioning. In one embodiment a wireless device includes a WLAN positioning system. The WLAN positioning system includes an AP scanner. The AP scanner is configured to determine which WLAN channels are being used by APs proximate to the wireless device. The AP scanner is also configured to scan for AP transmissions only the WLAN channels determined to be used by APs proximate to the wireless device. The AP scanner is further configured to extract signal strength and AP identification information for WLAN positioning from the AP transmissions on the scanned channels.
摘要翻译：用于扫描用于无线局域网（WLAN）定位的接入点（AP）的装置和方法。在一个实施例中，无线设备包括WLAN定位系统。 WLAN定位系统包括AP扫描器。 AP扫描器被配置为确定靠近无线设备的AP正在使用哪些WLAN信道。 AP扫描器还被配置为仅扫描AP传输，确定由接近无线设备的AP使用的WLAN信道。 AP扫描器还被配置为从扫描的信道上的AP传输中提取用于WLAN定位的信号强度和AP识别信息。

8. 发明授权

US08583360B2 Usage mode determination of navigation system 有权
标题翻译：导航系统的使用模式确定
公开(公告)号：US08583360B2
公开(公告)日：2013-11-12
申请号：US13027796
申请日：2011-02-15
申请人： Deric W. Waters , Tarkesh Pande
发明人： Deric W. Waters , Tarkesh Pande
IPC分类号： G06F19/00
CPC分类号： B63J99/00 , B63J2099/008 , G01C21/20 , G01C21/3423
摘要： A navigation system determines its usage mode. In some embodiments, a method comprises determining a usage mode of a navigation system based on at least one of an acceleration indicator, a speed indicator, and a magnet sensor. The usage mode is at least one of a pedestrian mode, a vehicular mode, an aerial mode, a train mode, and a marine mode. The method further comprises configuring a navigation subsystem based on the usage mode.
摘要翻译：导航系统确定其使用模式。在一些实施例中，一种方法包括基于加速度指示器，速度指示器和磁体传感器中的至少一个来确定导航系统的使用模式。使用模式是行人模式，车辆模式，空中模式，列车模式和船用模式中的至少一种。该方法还包括基于使用模式配置导航子系统。

9. 发明申请

US20110254729A1 CROSS COUPLED POSITIONING ENGINE (PE) ARCHITECTURE FOR SENSOR INTEGRATION IN GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) 有权
标题翻译：用于全球导航卫星系统（GNSS）传感器整合的交叉耦合定位发动机（PE）
公开(公告)号：US20110254729A1
公开(公告)日：2011-10-20
申请号：US13163199
申请日：2011-06-17
申请人： Goutam Dutta , Tarkesh Pande , Sandeep Rao , Deric W. Waters
发明人： Goutam Dutta , Tarkesh Pande , Sandeep Rao , Deric W. Waters
IPC分类号： G01S19/47
CPC分类号： G01S19/47 , G01C21/165 , G01S19/20 , G01S19/49 , G01S19/52
摘要： Embodiments of the disclosure provide a cross coupled position engine architecture for sensor integration in a Global Navigation Satellite System. In one embodiment, a data processing engine for processing inertial sensor data within a positioning system receiver is disclosed. The data processing engine includes a first input for receiving the sensor data, and a second input for receiving a positioning data. The data processing system also includes a memory and a processor. The processor of the data processing system is coupled to the memory and to the first and second input. The processor of the data processing system is configured to calculate a net acceleration profile data from the inertial sensor data and from the positioning data. The net acceleration profile data calculated by the processor of the data processing system is used for the Global Positioning System (GPS) receiver to subsequently calculate a position and a velocity data.
摘要翻译：本公开的实施例提供了用于全球导航卫星系统中的传感器集成的交叉耦合位置引擎结构。在一个实施例中，公开了一种用于在定位系统接收器内处理惯性传感器数据的数据处理引擎。数据处理引擎包括用于接收传感器数据的第一输入端和用于接收定位数据的第二输入端。数据处理系统还包括存储器和处理器。数据处理系统的处理器耦合到存储器和第一和第二输入端。数据处理系统的处理器被配置为从惯性传感器数据和定位数据计算净加速度曲线数据。由数据处理系统的处理器计算的净加速度曲线数据用于全球定位系统（GPS）接收机，以随后计算位置和速度数据。

10. 发明授权

US08612146B2 Accelerometer-aided gyroscope 有权
标题翻译：加速度计辅助陀螺仪
公开(公告)号：US08612146B2
公开(公告)日：2013-12-17
申请号：US13023987
申请日：2011-02-09
申请人： Deric W. Waters , Tarkesh Pande
发明人： Deric W. Waters , Tarkesh Pande
IPC分类号： G01C21/10
CPC分类号： G01C21/16 , G01C19/04 , Y10T74/1229
摘要： A system comprises a gyroscope configured to produce a gyroscope signal, an accelerometer configured to produce an accelerometer signal, and a filter unit coupled to the gyroscope and having a configurable bandwidth. The filter unit configured to filter the gyroscope signal. The system also comprises control logic that is configured to alter the bandwidth of the filter unit based on the accelerometer signal.
摘要翻译：一种系统包括被配置为产生陀螺仪信号的陀螺仪，被配置为产生加速度计信号的加速度计和耦合到陀螺仪并具有可配置带宽的滤波器单元。滤波器单元被配置为滤波陀螺仪信号。该系统还包括控制逻辑，其被配置为基于加速度计信号来改变滤波器单元的带宽。

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