公开(公告)号：US20140185472A1

公开(公告)日：2014-07-03

申请号：US13901777

申请日：2013-05-24

申请人： Mohamed Farouk Mansour ,  Deric Wayne Waters ,  Sthanunathan Ramakrishnan

发明人： Mohamed Farouk Mansour ,  Deric Wayne Waters ,  Sthanunathan Ramakrishnan

IPC分类号： H04W4/02

CPC分类号： H04W4/023 ,  H04W4/043 ,  H04W4/33

摘要： A method for incorporating invisible APs for RSSI based indoor positioning is presented. An empirical estimate of the probability of invisible APs versus distance is computed. An estimated position of the receiver can be computed using any statistical estimator based on the probability. In one embodiment, an estimate of the probability is computed by combining the probability over a set of visible APs and the probability over a set of invisible APs with the probability of individual contribution. In one embodiment a dynamic procedure is used to update the invisible probability that is computed using an AP dictionary built on the fly as new APs are detected. Incorporating invisible APs for estimating user position from the RSSI measurements for indoor positioning provides a better positioning accuracy as compared to typical estimators which rely only on the visible APs.

摘要翻译： 提出了一种融合基于RSSI室内定位的隐形AP的方法。 计算不可见AP与距离概率的经验估计。 可以使用基于概率的任何统计估计器来计算接收机的估计位置。 在一个实施例中，通过将一组可见AP的概率与具有个体贡献的概率的一组不可见的AP组合的概率来计算概率的估计。 在一个实施例中，使用动态过程来更新在检测到新的AP时，使用在飞行中构建的AP字典来计算的不可见概率。 与仅依赖于可见AP的典型估计器相比，结合用于从室内定位的RSSI测量中估计用户位置的不可见AP提供更好的定位精度。

公开(公告)号：US20120229334A1

公开(公告)日：2012-09-13

申请号：US13415609

申请日：2012-03-08

申请人： Deric Wayne WATERS ,  Ariton E. XHAFA ,  Ramanuja VEDANTHAM

发明人： Deric Wayne WATERS ,  Ariton E. XHAFA ,  Ramanuja VEDANTHAM

IPC分类号： G01S19/05

CPC分类号： G01S19/05 ,  G01S19/256 ,  H04W56/0045

摘要： Apparatus and method for providing fine timing assistance to global navigation satellite systems (GNSS) via wireless local area network (WLAN). In one embodiment, a method for synchronizing a global navigation satellite system (GNSS) receiver includes receiving, by a wireless device, via a wireless local area network (WLAN), fine time assistance information transmitted by an assisting device connected to the WLAN. A time value of a GNSS clock of the wireless device is adjusted based on the fine time assistance information. Based on the adjusted time value, GNSS codes of a GNSS positioning signal are acquired by the wireless device.

摘要翻译： 通过无线局域网（WLAN）向全球导航卫星系统（GNSS）提供精确时序辅助的装置和方法。 在一个实施例中，用于同步全球导航卫星系统（GNSS）接收机的方法包括经由无线局域网（WLAN）由无线设备接收由连接到WLAN的辅助设备发送的精细时间辅助信息。 基于精细时间辅助信息来调整无线装置的GNSS时钟的时间值。 基于调整后的时间值，通过无线装置获取GNSS定位信号的GNSS码。

公开(公告)号：US20120163261A1

公开(公告)日：2012-06-28

申请号：US13334371

申请日：2011-12-22

申请人： RAMANUJA VEDANTHAM ,  DERIC WAYNE WATERS ,  ARITON E. XHAFA

发明人： RAMANUJA VEDANTHAM ,  DERIC WAYNE WATERS ,  ARITON E. XHAFA

IPC分类号： H04W52/02

CPC分类号： H04W52/0206 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162 ,  Y02D70/164

摘要： A method of obtaining timing parameters between wireless station peers using reduced power. A timing measurement protocol is executed a including a plurality of Timing Measurement Action (TMA) frames between a first wireless station (STA1) and a second STA (STA2) within a wireless network. The plurality of TMA frames span a communications interval and include timing information. A power-save protocol is employed by at least one of STA1 and STA2 during execution of the timing measurement protocol during one or more sub-intervals between the plurality of TMA frames. STA1 or STA2 computes at least one timing parameter using the timing information.

摘要翻译： 一种使用降低功率获得无线站对等体之间的定时参数的方法。 在无线网络内的第一无线站（STA1）和第二STA（STA2）之间执行包括多个定时测量动作（TMA）帧的定时测量协议。 多个TMA帧跨越通信间隔并且包括定时信息。 在多个TMA帧之间的一个或多个子间隔期间，在执行定时测量协议期间由STA1和STA2中的至少一个采用省电协议。 STA1或STA2使用定时信息计算至少一个定时参数。

公开(公告)号：US20110156954A1

公开(公告)日：2011-06-30

申请号：US12648846

申请日：2009-12-29

申请人： June Chul Roh ,  Deric Wayne Waters

发明人： June Chul Roh ,  Deric Wayne Waters

IPC分类号： G01S19/30

CPC分类号： G01S19/22 ,  G01S19/40

摘要： A GNSS navigation system and navigation method for determining user position, user velocity, and improved uncertainty metrics for position and velocity. A measurement engine in an applications processor of the system determines pseudorange and delta range values over each time period for each received satellite signal, and also determines measurement noise variances for both pseudorange and delta range for the individual signals. The satellite-specific pseudorange and delta range measurement variances are used to determine the position and velocity uncertainties by a position engine, either by way of a least-squares linearization or by way of an enhanced Kalman filter. The uncertainties may be communicated to the system user, or used in generating an integrated position and velocity result from both the GNSS navigation function and an inertial navigation system result.

摘要翻译： 用于确定用户位置，用户速度和改善位置和速度的不确定性度量的GNSS导航系统和导航方法。 系统的应用处理器中的测量引擎在每个接收到的卫星信号的每个时间段上确定伪距和增量范围值，并且还确定各个信号的伪距和Δ范围的测量噪声方差。 卫星专用伪距和增量范围测量方差用于通过最小二乘法线性化或通过增强卡尔曼滤波器来确定位置引擎的位置和速度不确定度。 不确定性可以传达给系统用户，或者用于从GNSS导航功能和惯性导航系统结果生成集成位置和速度结果。

公开(公告)号：US20100171659A1

公开(公告)日：2010-07-08

申请号：US12712520

申请日：2010-02-25

申请人： Deric Wayne Waters ,  Sandeep Rao ,  Karthik Ramasubramanian

发明人： Deric Wayne Waters ,  Sandeep Rao ,  Karthik Ramasubramanian

IPC分类号： G01S19/37

CPC分类号： H04B17/24 ,  G01S19/34

摘要： Embodiments of the invention provide a method for making information in the position engine (PE) available to the measurement engine (ME). With the right information the ME can reduce its power consumption, and improve its performance. Other circuits, devices, systems, methods of operation and processes of manufacture are also disclosed.

摘要翻译： 本发明的实施例提供了一种用于在可用于测量引擎（ME）的位置引擎（PE）中进行信息的方法。 使用正确的信息，ME可以降低其功耗，并提高其性能。 还公开了其它电路，装置，系统，操作方法和制造方法。

公开(公告)号：US09182493B2

公开(公告)日：2015-11-10

申请号：US13415609

申请日：2012-03-08

申请人： Deric Wayne Waters ,  Ariton E. Xhafa ,  Ramanuja Vedantham

发明人： Deric Wayne Waters ,  Ariton E. Xhafa ,  Ramanuja Vedantham

IPC分类号： G01S19/25 ,  G01S19/05 ,  H04W56/00

CPC分类号： G01S19/05 ,  G01S19/256 ,  H04W56/0045

摘要： Apparatus and method for providing fine timing assistance to global navigation satellite systems (GNSS) via wireless local area network (WLAN). In one embodiment, a method for synchronizing a global navigation satellite system (GNSS) receiver includes receiving, by a wireless device, via a wireless local area network (WLAN), fine time assistance information transmitted by an assisting device connected to the WLAN. A time value of a GNSS clock of the wireless device is adjusted based on the fine time assistance information. Based on the adjusted time value, GNSS codes of a GNSS positioning signal are acquired by the wireless device.

摘要翻译： 通过无线局域网（WLAN）向全球导航卫星系统（GNSS）提供精确时序辅助的装置和方法。 在一个实施例中，用于同步全球导航卫星系统（GNSS）接收机的方法包括经由无线局域网（WLAN）由无线设备接收由连接到WLAN的辅助设备发送的精细时间辅助信息。 基于精细时间辅助信息来调整无线装置的GNSS时钟的时间值。 基于调整后的时间值，通过无线装置获取GNSS定位信号的GNSS码。

公开(公告)号：US08456358B2

公开(公告)日：2013-06-04

申请号：US13306038

申请日：2011-11-29

申请人： Ariton E. Xhafa ,  Deric Wayne Waters

发明人： Ariton E. Xhafa ,  Deric Wayne Waters

IPC分类号： G01S19/21

CPC分类号： G01S19/21

摘要： A method for operating a wireless transmitter and a global navigation satellite (“GNSS”) receiver coexistent in a mobile wireless device. A mobile wireless device includes a GNSS receiver and a wireless networking system. The wireless networking system includes a wireless transmitter. The wireless transmitter provides a first interference level signal to the GNSS receiver. The first interference level signal indicates a level of interference that the GNSS receiver can expect due to operation of the transmitter. A priority signal is asserted if the processing of navigation signals in the GNSS receiver takes precedence over wireless transmitter transmissions.

摘要翻译： 一种用于操作在移动无线设备中共存的无线发射机和全球导航卫星（“GNSS”）接收机的方法。 移动无线设备包括GNSS接收机和无线联网系统。 无线网络系统包括无线发射机。 无线发射机向GNSS接收机提供第一干扰电平信号。 第一干扰电平信号指示GNSS接收机由于发射机的操作而能够预期的干扰水平。 如果GNSS接收机中的导航信号的处理优先于无线发射机传输，则优先信号被断言。

公开(公告)号：US08331898B2

公开(公告)日：2012-12-11

申请号：US12244060

申请日：2008-10-02

申请人： Deric Wayne Waters ,  Karthik Ramasubramanian ,  Arun Raghupathy

发明人： Deric Wayne Waters ,  Karthik Ramasubramanian ,  Arun Raghupathy

IPC分类号： H04B1/16

CPC分类号： H04B1/1615 ,  G01S19/34

摘要： An electronic circuit includes a receiver circuit (BSP) operable to perform coherent summations having a coherent summations time interval, and a power control circuit (2130) coupled to said receiver circuit (BSP) and operable to impress a power controlling duty cycle (TON, TOFF) on the receiver circuit (BSP) inside the coherent summations time interval. Other circuits, devices, systems, methods of operation and processes of manufacture are also disclosed.

摘要翻译： 电子电路包括可操作以执行具有相干求和时间间隔的相干相加的接收器电路（BSP）和耦合到所述接收器电路（BSP）的功率控制电路（2130），并且可操作以将功率控制占空比（TON， TOFF）在相干求和时间间隔内的接收机电路（BSP）上。 还公开了其它电路，装置，系统，操作方法和制造方法。

公开(公告)号：US20120106418A1

公开(公告)日：2012-05-03

申请号：US13282707

申请日：2011-10-27

申请人： ARITON E. XHAFA ,  DERIC WAYNE WATERS ,  RAMANUJA VEDANTHAM

发明人： ARITON E. XHAFA ,  DERIC WAYNE WATERS ,  RAMANUJA VEDANTHAM

IPC分类号： H04W52/02 ,  H04W24/00 ,  G08C19/00

CPC分类号： H04W74/04 ,  H04W52/0216 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/22

摘要： A method of reducing client power consumption in a wireless network including a network server which provides computed client' locations, at least one access point (AP), and a plurality of wireless stations (STAs) including a first wireless station (STA1). The AP periodically sends beacon frames that span a beacon period, wherein at least a first beacon frame is sent during the beacon period. The STA1 sends a location request frame to the AP requesting a STA1 location. During the beacon period the STA1 wakes up from a powersave (PS) mode or a sleep mode and sends a PSPoll frame to the AP. Responsive to the PSPoll frame, the AP replies with a priority response being a data frame including a location response packet including the STA1 location or a Null frame if the STA1 location is not available.

摘要翻译： 一种降低无线网络中包括提供计算的客户端位置的网络服务器，至少一个接入点（AP）以及包括第一无线站（STA1）的多个无线站（STA））的客户端功耗的方法。 AP周期性地发送跨越信标周期的信标帧，其中在信标周期期间发送至少第一信标帧。 STA1向请求STA1位置的AP发送位置请求帧。 在信标期间，STA1从功率（PS）模式或睡眠模式唤醒，并向AP发送PSPoll帧。 响应于PSPoll帧，AP以优先级响应作为包括包括STA1位置的位置响应分组的数据帧或者如果STA1位置不可用则为空帧的数据帧。

公开(公告)号：US07957474B2

公开(公告)日：2011-06-07

申请号：US11618432

申请日：2006-12-29

申请人： Deric Wayne Waters ,  Srinath Hosur ,  Anuj Batra

发明人： Deric Wayne Waters ,  Srinath Hosur ,  Anuj Batra

IPC分类号： H04K1/10

CPC分类号： H04L27/0012 ,  H04L27/22 ,  H04L27/2647

摘要： Disclosed herein is a system and method for determining the presence of rotated-BPSK modulation. In addition, disclosed herein is a system and method for determining if a received packet is a Legacy, Mixed-Mode, or Green-Field packet in accordance with the determination of the presence of rotated-BPSK modulation. The presence of a Green-Field packet may be determined by detecting if additional tones are being excited in an LTF symbol of the received packet and/or if a SIG field symbol following the LTF symbol is modulated by rotated-BPSK. The presence of a Mixed-Mode packet may be determined by detecting if the first four bits of the SIG field symbol following the LTF symbol are [1 1 0 1] and/or detecting if a symbol following an L-SIG symbol is modulated by rotated-BPSK. The presence of a Legacy packet may be determined by detecting if the symbol following the L-SIG symbol is modulated by BPSK.

摘要翻译： 本文公开了一种用于确定旋转BPSK调制的存在的系统和方法。 此外，本文所公开的是根据确定旋转BPSK调制的确定来确定接收的分组是传统的，混合模式的还是绿色场分组的系统和方法。 可以通过检测在接收到的分组的LTF符号中是否激励附加音调和/或如果通过旋转BPSK调制LTF符号之后的SIG字段符号，则可以确定绿场分组的存在。 混合模式分组的存在可以通过检测LTF符号之后的SIG字段符号的前四位是否为[1×10 1]和/或检测在L-SIG符号之后的符号是否被 旋转BPSK。 可以通过检测L-SIG符号之后的符号是否被BPSK调制来确定遗留分组的存在。