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1. 发明授权

US08548495B2 System and method for determining a position of a mobile wireless device by accessing access points alamanacs database 有权
标题翻译：用于通过访问接入点alamanacs数据库来确定移动无线设备的位置的系统和方法
公开(公告)号：US08548495B2
公开(公告)日：2013-10-01
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。

2. 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。

3. 发明授权

US09001948B2 Pulse shaping in a communication system 有权
标题翻译：通信系统中的脉冲整形
公开(公告)号：US09001948B2
公开(公告)日：2015-04-07
申请号：US12977094
申请日：2010-12-23
申请人： Sthanunathan Ramakrishnan
发明人： Sthanunathan Ramakrishnan
IPC分类号： H04L27/18 , H04L27/22 , H04L27/00 , H04L27/06 , H04L27/04 , H04L27/20 , H04L25/03 , H04L27/34
CPC分类号： H04L25/03834 , H04L27/2017 , H04L27/3411
摘要： A transmitter used in a communication system includes a raised cosine filter for transmit pulse shaping. A receiver in the communication system, designed to receive and demodulate transmissions from the transmitter, includes a root-raised cosine filter for receive pulse shaping. The use of a raised cosine filter in the transmitter enables reduction of peak-to-average ratio (PAR) of the output of a power amplifier used in the transmitter, enabling the power amplifier to be implemented to have relatively higher power efficiency than otherwise. In an embodiment, the transmitter and receiver employ π/2-shift binary phase-shift keying (π/2 BPSK), and the raised cosine filter in the transmitter is implemented to have a roll-off factor of 0.5 and a total length of four symbol periods. In an embodiment, the root-raised cosine filter is implemented to have a roll-of factor of 0.2 and a length of four symbol periods.
摘要翻译：在通信系统中使用的发射机包括用于发射脉冲整形的升余弦滤波器。通信系统中的接收机，用于接收和解调来自发射机的传输，包括用于接收脉冲整形的根升余弦滤波器。在发射机中使用升余弦滤波器能够降低在发射机中使用的功率放大器的输出的峰均比（PAR），使功率放大器能够实现比其它功率效率更高的功率效率。在一个实施例中，发射机和接收机采用＆pgr / 2移位二进制相移键控（＆pgr / / BPSK），并且发射机中的升余弦滤波器被实现为具有0.5的滚降因子和总共四个符号周期的长度。在一个实施例中，根升余弦滤波器被实现为具有0.2的折叠因子和四个符号周期的长度。

4. 发明申请

US20130154879A1 APPARATUSES SYSTEMS AND METHODS FOR INFORMATION INTEGRITY MONITORING 有权
标题翻译：用于信息完整性监测的装置系统和方法
公开(公告)号：US20130154879A1
公开(公告)日：2013-06-20
申请号：US13330473
申请日：2011-12-19
申请人： Sthanunathan Ramakrishnan , Sandeep Rao
发明人： Sthanunathan Ramakrishnan , Sandeep Rao
IPC分类号： G01S19/42
CPC分类号： G01S19/426 , G01S19/20
摘要： Methods and integrated circuits for performing receiver autonomous integrity monitoring (RAIM) in global navigation satellite system (GNSS) receivers are disclosed. In an embodiment, a first information comprising current position related information is accessed. A second information comprising predicted position related information is accessed based on previously received information. A solution is computed based on the first information and the second information and a presence of outlier information is determined in at least one of the first information and the second information based on the solution.
摘要翻译：公开了用于在全球导航卫星系统（GNSS）接收机中执行接收机自主完整性监测（RAIM）的方法和集成电路。在一个实施例中，访问包括当前位置相关信息的第一信息。基于先前接收到的信息来访问包括预测位置相关信息的第二信息。基于第一信息和第二信息计算解决方案，并且基于解决方案在第一信息和第二信息中的至少一个中确定离群信息的存在。

5. 发明申请

US20070274205A1 VERSATILE SYSTEM FOR INTERFERENCE TOLERANT PACKET DETECTION IN WIRELESS COMMUNICATION SYSTEMS 有权
标题翻译：用于无线通信系统中干扰容忍分组检测的多功能系统
公开(公告)号：US20070274205A1
公开(公告)日：2007-11-29
申请号：US11420619
申请日：2006-05-26
申请人： Karthik Ramasubramanian , Sthanunathan Ramakrishnan
发明人： Karthik Ramasubramanian , Sthanunathan Ramakrishnan
IPC分类号： H04J3/14 , H04L12/56
CPC分类号： H04L7/042 , H04L27/2647
摘要： The present invention provides a system for obviating interference effects in packet detection within a wireless communications network. A plurality of reference signals is provided—a first of which corresponds to desired packets, and the remainder of which correspond to undesired packets or interference. A plurality of cross-correlation constructs corresponds, respectively, to the plurality of reference signals. Each cross-correlation construct correlates an incoming signal to a plurality of repetitions of its respective reference signal. An analysis construct compares output from each cross-correlation construct with other cross-correlation construct outputs, and with a threshold value, to determine which incoming signal corresponds to desired packet data. Once this incoming signal is identified, packets from the signal may be reliably received.
摘要翻译：本发明提供了一种用于消除无线通信网络内的分组检测中的干扰影响的系统。提供了多个参考信号 - 第一个参考信号对应于期望的分组，其余部分对应于不期望的分组或干扰。多个互相关构造分别对应于多个参考信号。每个互相关构造将输入信号与其相应参考信号的多个重复相关联。分析构造将来自每个互相关构造的输出与其他互相关构造输出和阈值进行比较，以确定哪个输入信号对应于期望的分组数据。一旦该输入信号被识别，则可以可靠地接收来自信号的分组。

6. 发明申请

US20140185472A1 METHOD FOR INCORPORATING INVISIBLE ACCESS POINTS FOR RSSI-BASED INDOOR POSITIONING APPLICATIONS 有权
标题翻译：用于基于RSSI的室内定位应用的无用接入点的方法
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。

7. 发明申请

US20120257651A1 METHOD AND APPARATUS TO IMPROVE SENSITIVITY OF DECODING TIME OF A GLOBAL NAVIGATION SATELLITE SYSTEM RECEIVER 有权
标题翻译：提高全球导航卫星系统接收机解码时间灵敏度的方法与装置
公开(公告)号：US20120257651A1
公开(公告)日：2012-10-11
申请号：US13080337
申请日：2011-04-05
申请人： Sandeep Rao , Jaiganesh Balakrishnan , Sthanunathan Ramakrishnan
发明人： Sandeep Rao , Jaiganesh Balakrishnan , Sthanunathan Ramakrishnan
IPC分类号： H04L27/06 , H04B1/707
CPC分类号： H04L25/03203 , G01S19/243 , G01S19/246
摘要： A method and an integrated circuit to improve sensitivity of decoding time of a GNSS receiver are disclosed. A plurality of estimates of states of an encoder for one or more instances of a time counter is maintained. A signal comprising a plurality of data bits corresponding to an instance of the time counter is detected and at least one augmented state for each estimate of states of the encoder is determined. A corresponding augmented state for successive instances of the time counter is predicted and an augmented branch metric for each of the at least one augmented state is computed. A path metric for the each estimate is updated based on the augmented branch metric for each of the at least one augmented state and a time counter value is determined based on the path metric for the each estimate.
摘要翻译：公开了一种提高GNSS接收机解码时间灵敏度的方法和集成电路。维持用于时间计数器的一个或多个实例的编码器的状态的多个估计。检测包括对应于时间计数器的实例的多个数据位的信号，并且确定编码器状态的每个估计的至少一个增强状态。预测时间计数器的连续实例的对应的增强状态，并且计算用于至少一个增强状态中的每一个的增强分支量度。基于用于所述至少一个增强状态中的每一个的增强分支度量来更新每个估计的路径度量，并且基于每个估计的路径度量来确定时间计数器值。

8. 发明申请

US20120163489A1 PULSE SHAPING IN A COMMUNICATION SYSTEM 有权
标题翻译：通信系统中的脉冲形状
公开(公告)号：US20120163489A1
公开(公告)日：2012-06-28
申请号：US12977094
申请日：2010-12-23
申请人： Sthanunathan Ramakrishnan
发明人： Sthanunathan Ramakrishnan
IPC分类号： H04L27/18 , H04L27/22 , H04L27/00 , H04L27/06 , H04L27/04 , H04L27/20
CPC分类号： H04L25/03834 , H04L27/2017 , H04L27/3411
摘要： A transmitter used in a communication system includes a raised cosine filter for transmit pulse shaping. A receiver in the communication system, designed to receive and demodulate transmissions from the transmitter, includes a root-raised cosine filter for receive pulse shaping. The use of a raised cosine filter in the transmitter enables reduction of peak-to-average ratio (PAR) of the output of a power amplifier used in the transmitter, enabling the power amplifier to be implemented to have relatively higher power efficiency than otherwise. In an embodiment, the transmitter and receiver employ π/2-shift binary phase-shift keying (π/2 BPSK), and the raised cosine filter in the transmitter is implemented to have a roll-off factor of 0.5 and a total length of four symbol periods. In an embodiment, the root-raised cosine filter is implemented to have a roll-of factor of 0.2 and a length of four symbol periods.
摘要翻译：在通信系统中使用的发射机包括用于发射脉冲整形的升余弦滤波器。通信系统中的接收机，用于接收和解调来自发射机的传输，包括用于接收脉冲整形的根升余弦滤波器。在发射机中使用升余弦滤波器能够降低在发射机中使用的功率放大器的输出的峰均比（PAR），使功率放大器能够实现比其它功率效率更高的功率效率。在一个实施例中，发射机和接收机采用＆pgr / 2-shift二进制相移键控（＆pgr / / BPSK），并且发射机中的升余弦滤波器被实现为具有0.5的滚降因子和总共四个符号周期的长度。在一个实施例中，根升余弦滤波器被实现为具有0.2的折叠因子和四个符号周期的长度。

9. 发明申请

US20120106602A1 Signaling in a Medical Implant Based System 审中-公开
标题翻译：基于医学植入物系统的信号传导
公开(公告)号：US20120106602A1
公开(公告)日：2012-05-03
申请号：US13347893
申请日：2012-01-11
申请人： Sthanunathan Ramakrishnan , Ganesan Thiagarajan , Divyesh Kumar Shah , Jaiganesh Balakrishnan , Sriram Murali
发明人： Sthanunathan Ramakrishnan , Ganesan Thiagarajan , Divyesh Kumar Shah , Jaiganesh Balakrishnan , Sriram Murali
IPC分类号： H04B1/38
CPC分类号： A61N1/3727
摘要： Signaling in a medical implant based system. A method includes transmitting bits modulated with a predefined sequence in a band of channels by a first medical transceiver. The method includes transmitting bits modulated with a first predefined sequence of a plurality of predefined sequences by a first medical transceiver. The first predefined sequence is detected by a second medical transceiver when the second medical transceiver enters into an active state. A predetermined action is preformed if the first predefined sequence is detected.
摘要翻译：在医疗植入物系统中进行信号传导。一种方法包括通过第一医疗收发器传输利用频道频带中的预定义序列调制的比特。该方法包括通过第一医疗收发器传输利用多个预定义序列的第一预定义序列调制的比特。当第二医疗收发器进入活动状态时，第一预定义序列由第二医疗收发器检测。如果检测到第一预定义序列，则执行预定动作。

10. 发明授权

US09069073B2 Removing and de-weighting outlier measurements from satellite and previous information 有权
标题翻译：从卫星和以前的信息中去除和取消加权异常值测量
公开(公告)号：US09069073B2
公开(公告)日：2015-06-30
申请号：US13330473
申请日：2011-12-19
申请人： Sthanunathan Ramakrishnan , Sandeep Rao
发明人： Sthanunathan Ramakrishnan , Sandeep Rao
IPC分类号： G01S19/42 , G01S19/20
CPC分类号： G01S19/426 , G01S19/20
摘要： Methods and integrated circuits for performing receiver autonomous integrity monitoring (RAIM) in global navigation satellite system (GNSS) receivers are disclosed. In an embodiment, a first information comprising current position related information is accessed. A second information comprising predicted position related information is accessed based on previously received information. A solution is computed based on the first information and the second information and a presence of outlier information is determined in at least one of the first information and the second information based on the solution.
摘要翻译：公开了用于在全球导航卫星系统（GNSS）接收机中执行接收机自主完整性监测（RAIM）的方法和集成电路。在一个实施例中，访问包括当前位置相关信息的第一信息。基于先前接收到的信息来访问包括预测位置相关信息的第二信息。基于第一信息和第二信息计算解决方案，并且基于解决方案在第一信息和第二信息中的至少一个中确定离群信息的存在。

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