公开(公告)号：US20110202754A1

公开(公告)日：2011-08-18

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： G06F9/00

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。

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：US20120063340A1

公开(公告)日：2012-03-15

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： H04W24/00 ,  H04W84/12 ,  H04W88/08

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。

公开(公告)号：US20080187061A1

公开(公告)日：2008-08-07

申请号：US12024064

申请日：2008-01-31

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

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

IPC分类号： H04L27/28

CPC分类号： H04B7/043 ,  H04L25/0204 ,  H04L27/2626

摘要： 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.

摘要翻译： 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：US20120158296A1

公开(公告)日：2012-06-21

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： G01C21/12

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。

公开(公告)号：US20080187032A1

公开(公告)日：2008-08-07

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 。

公开(公告)号：US20120058778A1

公开(公告)日：2012-03-08

申请号：US13227844

申请日：2011-09-08

申请人： Deric W. WATERS ,  Sthanunathan RAMAKRISHNAN

发明人： Deric W. WATERS ,  Sthanunathan RAMAKRISHNAN

IPC分类号： H04W24/00

CPC分类号： H04W64/003 ,  G01S5/0027 ,  G01S5/0036 ,  G01S5/0252

摘要： A system and method for determining a position of a mobile wireless device using wireless local area network access points (APs). In one embodiment, a mobile wireless device includes an AP positioning system configured to estimate a position of the device based on locations of APs disposed about the device. The AP positioning system is configured to: 1) access an AP database; and 2) provide, to the database, one or more medium access controller (MAC) addresses and an area of interest value. The AP positioning system is also configured to retrieve, from the database: 1) location information for each AP having a provided MAC address, or located within the area of interest; and 2) at least one of: signal parameters for the APs nearby the device, a geographic area within which each MAC address can be received, and an indication of a scan type to used for identifying APs.

摘要翻译： 一种用于使用无线局域网接入点（AP）确定移动无线设备的位置的系统和方法。 在一个实施例中，移动无线设备包括被配置为基于设置在设备周围的AP的位置来估计设备的位置的AP定位系统。 AP定位系统配置为：1）访问AP数据库; 和2）向数据库提供一个或多个媒体访问控制器（MAC）地址和感兴趣的区域的价值。 AP定位系统还被配置为从数据库检索：1）具有提供的MAC地址或位于感兴趣区域内的每个AP的位置信息; 以及2）以下中的至少一个：设备附近的AP的信号参数，可以接收每个MAC地址的地理区域以及用于识别AP的扫描类型的指示。

公开(公告)号：US20090031185A1

公开(公告)日：2009-01-29

申请号：US12147823

申请日：2008-06-27

申请人： Ariton E. XHAFA ,  Deric W. WATERS ,  Anuj BATRA

发明人： Ariton E. XHAFA ,  Deric W. WATERS ,  Anuj BATRA

IPC分类号： H04L1/18 ,  G06F11/07

CPC分类号： H04L1/1819 ,  H04L1/0013 ,  H04L1/0068 ,  H04L1/0071

摘要： Systems and methods for hybrid automatic repeat-request (HARQ) communication, comprising a transmitter employing hybrid automatic repeat-request (HARQ) and able to retransmit an incorrectly received packet without differently re-encoding data bits. The transmitter is further able to select at least one bit from any in a set to forward in at least one retransmission. The set contains any bits punctured from an original transmission corresponding to the retransmission. Other embodiments transmit, by a transmitter using hybrid automatic repeat-request (HARQ), a packet containing at least one punctured bit, select—without differently re-encoding data bits—at least one bit from any in a set to forward in at least one re-transmission of an incorrectly received packet, and retransmit the packet with at least one different punctured bit. The set contains any bits punctured from an original transmission corresponding to the re-transmission.

摘要翻译： 用于混合自动重传请求（HARQ）通信的系统和方法，包括采用混合自动重传请求（HARQ）的发射机，并且能够重传不正确接收的分组而不会对数据比特进行不同的重新编码。 发射机还能够在至少一个重传中从集合中的任何一个中选择至少一个比特来转发。 该集合包含从对应于重传的原始传输中删除的任何位。 其他实施例由发射机使用混合自动重复请求（HARQ）发送包含至少一个穿孔位的分组，选择 - 不再对数据比特进行不同的重新编码 - 至少一个比特中的任何一个比特至少一个比特到 重新发送错误接收的分组，并且用至少一个不同的穿孔比特重传分组。 该集合包含从对应于重传的原始传输中删除的任何位。

公开(公告)号：US20080267306A1

公开(公告)日：2008-10-30

申请号：US12101767

申请日：2008-04-11

申请人： Anuj BATRA ,  Deric W. WATERS

发明人： Anuj BATRA ,  Deric W. WATERS

IPC分类号： H04L27/06

CPC分类号： H04L25/03171 ,  H04L25/0204 ,  H04L27/2647

摘要： Embodiments provide novel systems and methods for low-complexity maximum-likelihood detection, for use in various communication systems, e.g., multiple-input multiple-output (MIMO) systems, etc. These systems and methods enable computation of a detector that is more accurate than the max-log approximation. Embodiments comprise systems and methods for computing, using a maximum-likelihood detector, a set of log-likelihood ratio (LLR) values for a cost function of a channel input by implementing at least one accumulate LLR functional definition.

摘要翻译： 实施例提供用于低复杂度最大似然检测的新型系统和方法，用于各种通信系统，例如多输入多输出（MIMO）系统等。这些系统和方法使得能够计算更准确的检测器 比最大对数近似值。 实施例包括用于通过实施至少一个累积LLR功能定义来计算使用最大似然检测器对于通道输入的成本函数的对数似然比（LLR）值的集合的系统和方法。

公开(公告)号：US20080137763A1

公开(公告)日：2008-06-12

申请号：US11930259

申请日：2007-10-31

申请人： Deric W. WATERS ,  Naftali SOMMER ,  Doron BURSHTEIN ,  Rafi DALLA TORRE ,  Oren PELES ,  Anuj BATRA ,  Srinath HOSUR ,  Daniel WAJCER

发明人： Deric W. WATERS ,  Naftali SOMMER ,  Doron BURSHTEIN ,  Rafi DALLA TORRE ,  Oren PELES ,  Anuj BATRA ,  Srinath HOSUR ,  Daniel WAJCER

IPC分类号： H04L27/28 ,  H04L27/00 ,  H04L27/06

CPC分类号： H04L25/03006 ,  H04L2025/03426

摘要： A method and system for performing Multiple-input Multiple-Output (“MIMO”) detection that reduces complexity by decomposing MIMO detection problem into two less complex problems, Candidate List generation and Interference Cancellation (“CLIC”). Embodiments of the CLIC framework parse an N element channel output into a first set containing S elements and a second set containing N-S elements. A first list of candidate vectors is generated from the first set of elements. A set of interference cancelled elements is generated by using the first list of candidate vectors to cancel interference from the second set of elements. A second list of candidate vectors is generated from the set of interference cancelled elements. A minimum cost is computed for each bit of the candidate vectors and from the costs a log-likelihood ratio is computed.

摘要翻译： 一种用于执行多输入多输出（“MIMO”）检测的方法和系统，其通过将MIMO检测问题分解成两个较不复杂的问题，候选列表生成和干扰消除（“CLIC”）来降低复杂度。 CLIC框架的实施例将N元素信道输出解析为包含S个元素的第一集合和包含N-S个元素的第二集合。 从第一组元素生成候选向量的第一列表。 通过使用候选向量的第一列表来消除来自第二组元素的干扰来生成一组干扰消除元素。 从干扰消除元素的集合生成候选向量的第二列表。 针对候选向量的每一位计算最小成本，并从成本计算对数似然比。