公开(公告)号：US08130145B2

公开(公告)日：2012-03-06

申请号：US12491093

申请日：2009-06-24

申请人： Emilija M. Simic ,  Douglas Neal Rowitch ,  Sundar Raman

发明人： Emilija M. Simic ,  Douglas Neal Rowitch ,  Sundar Raman

IPC分类号： G01S19/36

CPC分类号： G01S19/36 ,  G01S19/24 ,  H04B2201/70715

摘要： The subject matter disclosed herein relates to receiving one or more SPS signals at two or more physically separated antennae. In an aspect, signals from the physically separated antennae may be downconverted into complex digital signals that may undergo further processing to improve one or more performance metrics related to position estimation operations, for example.

摘要翻译： 本文公开的主题涉及在两个或更多物理分离的天线处接收一个或多个SPS信号。 在一个方面，来自物理分离的天线的信号可以被下变频成复数的数字信号，例如可以经历进一步的处理以改进与位置估计操作有关的一个或多个性能度量。

公开(公告)号：US08121238B2

公开(公告)日：2012-02-21

申请号：US11553983

申请日：2006-10-27

申请人： Sundar Raman ,  James M. Brown

发明人： Sundar Raman ,  James M. Brown

IPC分类号： H04L7/00

CPC分类号： H04B1/7075 ,  G01S19/24 ,  G01S19/30 ,  H04B2201/70715

摘要： A system and method for synchronizing a receiver of a bit stream to the bit stream include a correlator to remove the PN code modulation and to generate a stream of time sequence values (samples) from the received bits. A plurality of accumulators are included, each accumulator corresponding to an offset in a series of time intervals starting with a first time period. The accumulators add a number of values equal to a number of samples in a bit period. The values added by each accumulator is a set of values starting with the value at the offset corresponding to the accumulator. A plurality of magnitude calculators receives a sum from the corresponding accumulator and calculates a magnitude. A plurality of non-coherent summers are then used to add the magnitudes for each offset in each bit period for all of the received bits. The total sum in each non-coherent summer is then analyzed to find the highest value, such that the offset corresponding to the non-coherent summer with the highest value represents the location of the bit transition in the bit period.

摘要翻译： 用于将比特流的接收机同步到比特流的系统和方法包括相关器，以去除PN码调制并从接收的比特生成时间序列值（采样）流。 包括多个累加器，每个累加器对应于从第一时间段开始的一系列时间间隔中的偏移量。 累加器在一个位周期中增加等于多个样本的值。 每个累加器添加的值是一个值，它以对应于累加器的偏移量的值开始。 多个幅度计算器从相应的累加器接收和，并计算大小。 然后使用多个非相干相加对于所有接收的比特在每个比特周期中为每个偏移增加幅度。 然后分析每个非相干夏季中的总和以找到最高值，使得与具有最高值的非相干夏季对应的偏移表示比特周期中比特转换的位置。

公开(公告)号：US20110314360A1

公开(公告)日：2011-12-22

申请号：US12817017

申请日：2010-06-16

申请人： Sundar Raman

发明人： Sundar Raman

IPC分类号： G06F11/08

CPC分类号： H04L7/0338 ,  H04L25/4904

摘要： Apparatus and methods for detecting data bit edge in a meander encoded information bit from a satellite positioning system (SPS) such as GLONASS (Global Navigation Satellite System) are discussed. A method comprises receiving meander encoded data samples from a meander encoded information bit. The method includes computing a set of accumulated values for a corresponding set of hypotheses, each of the hypotheses corresponding to a hypothesized bit edge phase. The process of computing an accumulated value of the set of accumulated values includes providing a toggled subset of the meander encoded data samples, and integrating the toggled subset of the meander encoded data samples with an un-toggled subset of the meander encoded data samples to produce the accumulated value. The method also includes selecting a best hypothesis from the set of hypotheses corresponding to a maximum value of the set of accumulated values, wherein the best hypothesis represents the data bit edge.

摘要翻译： 讨论了用于从诸如GLONASS（全球导航卫星系统）的卫星定位系统（SPS）的曲折编码信息比特中检测数据比特边的装置和方法。 一种方法包括从曲折编码信息比特接收曲折编码的数据样本。 该方法包括计算相应的一组假设的一组累积值，每个假设对应于假设的位边缘相位。 计算累积值集合的累加值的过程包括提供曲折编码数据样本的切换子集，以及将曲折编码数据样本的切换子集与曲折编码数据样本的未切换子集合，以产生 累计值。 该方法还包括从对应于累积值集合的最大值的假设集合中选择最佳假设，其中最佳假设表示数据比特边缘。

公开(公告)号：US07580489B2

公开(公告)日：2009-08-25

申请号：US11193710

申请日：2005-07-29

申请人： Sundar Raman

发明人： Sundar Raman

IPC分类号： H04B7/10

CPC分类号： H04B1/7085 ,  H04B1/7115 ,  H04B1/7117

摘要： A rake receiver tracks a component of a multipath information signal transmitted over a communication network. The rake receiver aligns and synchronized the component with a locally generated replica of the code sequence that was originally used to spread the information signal at the transmitter side. The rake receiver derives an early de-spread signal using an early shifted version of the replica of the code sequence. The replica is early shifted by a variable delay. The rake receiver also derives a late shifted de-spread signal using a late shifted version of the replica of the code sequence. The replica is late shifted by the same variable delay. The variable delay may be chosen arbitrarily or among a selection of predetermined values. The predetermined values may be selected so that the tracking process is optimized.

公开(公告)号：US20090115656A1

公开(公告)日：2009-05-07

申请号：US11935617

申请日：2007-11-06

申请人： Sundar Raman ,  Lionel Garin

发明人： Sundar Raman ,  Lionel Garin

IPC分类号： G01S1/00 ,  G01S5/00

CPC分类号： G01S19/41 ,  G01S5/009 ,  G01S19/47

摘要： Systems and methods for global differential positioning are provided. In this regard, a representative system, among others, may include a first receiver being configured to receive global correction data from a single source; and a computing device being configured to adjust positional estimates based on the received global correction data. A representative method, among others, for global differential positioning may include receiving satellite measurement information; receiving global correction data from a single source; generating location information based on the received satellite information; adjusting the location information based on the global correction data to produce adjusted location information; and delivering the adjusted location information.

摘要翻译： 提供了全球差分定位系统和方法。 在这点上，代表性系统可以包括第一接收器，其被配置为从单个源接收全局校正数据; 以及计算设备，被配置为基于所接收的全局校正数据来调整位置估计。 用于全球差分定位的代表性方法可包括接收卫星测量信息; 从单一来源接收全局校正数据; 基于接收的卫星信息产生位置信息; 基于全局校正数据调整位置信息以产生调整的位置信息; 并传送调整后的位置信息。

公开(公告)号：US20070077911A1

公开(公告)日：2007-04-05

申请号：US11242760

申请日：2005-10-04

申请人： Sundar Raman

发明人： Sundar Raman

IPC分类号： H04M11/00

CPC分类号： H04M15/00

摘要： At least one network element as comprises a part of a communication system maintains (11) a prepaid units account on behalf of each of a plurality of communication system users, wherein the prepaid units correspond to at least one prepaid data communication service. Upon receiving (12) a message from a first communication system user authorizing a transfer of at least some portion of the first communication system user's prepaid units account to a second communication system uesr's prepaid units account, the network element(s) then preferably facilitates (13) a transfer of at least some portion of the first communication system user's prepaid units account to the second communication system user's prepaid units account.

摘要翻译： 包括通信系统的一部分的至少一个网元维护（11）代表多个通信系统用户中的每一个的预付单元帐户，其中所述预付单元对应于至少一个预付费数据通信服务。 在从第一通信系统用户接收（12）授权将第一通信系统用户的预付单元帐户的至少一部分传送到第二通信系统的预付单元帐户的消息时，网元优选地便利（ 13）将第一通信系统用户的预付单元帐户的至少一部分传送到第二通信系统用户的预付单元帐户。

公开(公告)号：US20060152409A1

公开(公告)日：2006-07-13

申请号：US10530069

申请日：2003-10-01

申请人： Sundar Raman ,  Reza Abtahi ,  Qingwen Zhang ,  Gengsheng Zhang ,  Lionel Garin

发明人： Sundar Raman ,  Reza Abtahi ,  Qingwen Zhang ,  Gengsheng Zhang ,  Lionel Garin

IPC分类号： G01S5/14

CPC分类号： G01S19/28 ,  G01S19/24 ,  G01S19/29

摘要： A system within a multi-channel GPS receiver that searches for Global Positioning System (GPS) satellites by receipt of a plurality of GPS signals where each GPS signal corresponds to a GPS satellite having a GPS satellite identification number (ID) is shown. The system may include a controller in control of the multi-channel GPS receiver that assigns each GPS satellite ID that corresponds to each of the plurality of GPS signals received by the multi-channel GPS receiver to an individual channel of the multi-channel GPS receiver and a monitoring channel selected by the controller from the multi-channel GPS receiver that monitors the received GPS signal.

摘要翻译： 示出了多通道GPS接收机内的系统，其通过接收多个GPS信号来搜索全球定位系统（GPS）卫星，其中每个GPS信号对应于具有GPS卫星识别号码（ID）的GPS卫星。 该系统可以包括控制多通道GPS接收器的控制器，其将与由多通道GPS接收机接收的多个GPS信号中的每一个对应的每个GPS卫星ID分配给多频道GPS接收机的单独信道 以及由监视所接收的GPS信号的多通道GPS接收器由控制器选择的监视通道。

公开(公告)号：US20050265432A1

公开(公告)日：2005-12-01

申请号：US11193710

申请日：2005-07-29

申请人： Sundar Raman

发明人： Sundar Raman

IPC分类号： H04B1/7085 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/707

CPC分类号： H04B1/7085 ,  H04B1/7115 ,  H04B1/7117

摘要： A rake receiver tracks a component of a multipath information signal transmitted over a communication network. The rake receiver aligns and synchronized the component with a locally generated replica of the code sequence that was originally used to spread the information signal at the transmitter side. The rake receiver derives an early de-spread signal using an early shifted version of the replica of the code sequence. The replica is early shifted by a variable delay. The rake receiver also derives a late shifted de-spread signal using a late shifted version of the replica of the code sequence. The replica is late shifted by the same variable delay. The variable delay may be chosen arbitrarily or among a selection of predetermined values. The predetermined values may be selected so that the tracking process is optimized.

公开(公告)号：US06829473B2

公开(公告)日：2004-12-07

申请号：US10322027

申请日：2002-12-17

申请人： Sundar Raman ,  Michael Borella ,  Chandra Warrier

发明人： Sundar Raman ,  Michael Borella ,  Chandra Warrier

IPC分类号： H04M1500

CPC分类号： H04W4/24 ,  G06Q20/28 ,  H04L12/14 ,  H04L12/1467 ,  H04M15/48 ,  H04M15/775 ,  H04M15/8038 ,  H04M15/82 ,  H04M15/8228 ,  H04M17/00 ,  H04M2215/0156 ,  H04M2215/2026 ,  H04M2215/204 ,  H04M2215/22 ,  H04M2215/32 ,  H04M2215/34 ,  H04M2215/7277 ,  H04M2215/7442 ,  H04M2215/78 ,  H04M2215/7833 ,  H04W24/10 ,  H04W36/00 ,  H04W76/10 ,  H04W80/04

摘要： A method and apparatus for providing roaming and hand-off support for prepaid billing for wireless prepaid services on a data network may be provided by a first-network-access device carrying on session activity of a wireless communication session with a wireless-mobile node within a first coverage area. The first-network-access device receives blocks of credits drawn from a user account having a cache of available credits for the prepaid-services. The first-network-access device periodically measures usage of the session activity in terms of a first of a plurality of measurement-method parameters. The first-network-access device debits the usage of the session activity from the blocks of credits. After entering its coverage area, the second-network-access device establishes connectivity with the wireless-mobile node. The first-network-access device tunnels to the second-network-access device the session activity and any unused credits. The second-network-access device periodically measures usage of the tunneled session activity in terms of tunneled measurement-method parameters. The second-network-access device debits the usage of the tunneled session activity from the tunneled unused credits. The second-network-access device then establishes independent network access for the session activity. The second-network-access device receives blocks of credits. The second-network-access device periodically measures the usage of the session activity in terms of another of the plurality of measurement-method parameters. The second-network-access device debits the usage of the session activity from the blocks of credits it receives. After hand-off, the first-network-access device may receive from indications to terminate session activity, to stop debiting the usage of the session activity, and/or to return unused credits.

摘要翻译： 用于为数据网络上的无线预付费服务提供预付费用的漫游和切换支持的方法和装置可以由承载与无线移动节点的无线通信会话的会话活动的第一网络接入设备提供 第一个覆盖区域。 第一网络访问设备接收从具有用于预付费服务的可用信用的高速缓存的用户帐户中提取的信用块。第一网络接入设备周期性地测量会话活动的使用，就多个 的测量方法参数。 第一网络接入设备从信用块借记会话活动的使用。在进入其覆盖区域之后，第二网络接入设备与无线移动节点建立连接。 第一网络接入设备向第二网络接入设备隧道会话活动和任何未使用的信用。 第二网络接入设备根据隧道测量方法参数周期性地测量隧道化会话活动的使用。 第二网络接入设备从通道未使用的信用中借用隧道化会话活动的使用。然后，第二网络接入设备为会话活动建立独立的网络接入。 第二网络接入设备接收信用块。 第二网络接入设备根据多个测量方法参数中的另一个周期性地测量会话活动的使用。 第二网络接入设备从接收到的信用块借记会话活动的使用。在切换之后，第一网络接入设备可以从指示接收终止会话活动，以停止对 会话活动和/或返回未使用的积分。

公开(公告)号：US08838376B2

公开(公告)日：2014-09-16

申请号：US13436600

申请日：2012-03-30

申请人： Lionel Jacques Garin ,  Sundar Raman

发明人： Lionel Jacques Garin ,  Sundar Raman

IPC分类号： G01C21/32

CPC分类号： G01C21/206 ,  G09B29/003 ,  G09B29/005 ,  H04W4/029 ,  H04W4/043

摘要： An apparatus and method for merging a disjoint pair of maps comprising a digital building map that includes a floor plan and an access point (AP) map that includes identifiers for a plurality of access points is presented. In some embodiments, a first trajectory plot, of a mobile device, relative to the AP map, is received and a plurality of hypotheses is set, where each hypothesis defines a unique translation between the AP map and the building map. A plurality of costs may be computed for the first trajectory, where each cost of the first trajectory corresponds to a distinct hypothesis in the plurality of hypotheses. The hypothesis where the first trajectory has the lowest cost relative to the other hypotheses may be selected.

摘要翻译： 提出了一种用于合并包括包括平面图的数字建筑图和包括多个接入点的标识符的接入点（AP）地图）的不相交对的地图的装置和方法。 在一些实施例中，接收移动设备相对于AP地图的第一轨迹图，并且设置多个假设，其中每个假设定义了AP地图和建筑物地图之间的独特翻译。 可以针对第一轨迹计算多个成本，其中第一轨迹的每个成本对应于多个假设中的明显假设。 可以选择第一轨迹相对于其他假设具有最低成本的假设。