公开(公告)号：US20070273581A1

公开(公告)日：2007-11-29

申请号：US11709309

申请日：2007-02-21

申请人： James Garrison ,  Brenda Eichel

发明人： James Garrison ,  Brenda Eichel

IPC分类号： G01S5/02

CPC分类号： G01S19/05

摘要： A method for propagating ephemeris data for a satellite in Earth orbit is provided. The method includes the steps of receiving orbital positional data for a first time period of a satellite's Earth orbit, propagating orbital positional data for the satellite's Earth orbit during a second time period extending beyond the first time period, fitting a Keplerian ephemeris model to the propagated orbital positional data to estimate model coefficients, and sending the estimated model coefficients to receivers for determination of receiver position at a time during the second time period.

摘要翻译： 提供了一种传播地球轨道卫星星历数据的方法。 该方法包括以下步骤：在卫星的地球轨道的第一时间段内接收轨道位置数据，在超过第一时间段的第二时间段内传播用于卫星的地球轨道的轨道位置数据，将开普勒星历模型拟合到传播的 轨道位置数据以估计模型系数，以及将估计的模型系数发送到接收机，以在第二时间段期间的一个时间确定接收机位置。

公开(公告)号：US20070046534A1

公开(公告)日：2007-03-01

申请号：US11212125

申请日：2005-08-25

申请人： Nesreen Ziedan ,  James Garrison

发明人： Nesreen Ziedan ,  James Garrison

IPC分类号： G01S5/14 ,  H04B1/00

CPC分类号： H04B1/70775 ,  G01S19/21 ,  G01S19/246

摘要： A method of acquiring a weak signal includes selecting a first predetection integration time (PIT) interval for processing a digital intermediate frequency (IF) signal, selecting a number of data bit edges within the PIT, computing a plurality of coherent integrations for each data bit edge, selecting a coherent integration, which corresponds to a most likely data combination for each data bit edge, from the plurality of coherent integrations, updating an incoherent integration total for each data bit edge with the coherent integration corresponding to the selected most likely data bit combination for each data bit edge, comparing the incoherent integration total for each data bit edge with a threshold after a predetermined number of steps of the coherent integration computations and incoherent integration total updates, and identifying a code delay from the incoherent integration. The method may also include determining a code delay from an estimated Doppler shift corresponding to the identified code delay. In this method, the coherent integrations are computed using a circular correlation technique that is performed in a manner so the coherent integrations are not independent from one another in successive steps. Thus, computational efficiencies may be gained from subsequent uses of coherent integrations computed during previous steps. The circular correlation is preferably performed over intervals corresponding to the separation between data bit edges.

摘要翻译： 获取弱信号的方法包括选择用于处理数字中频（IF）信号的第一预检测积分时间（PIT）间隔，选择PIT内的数据比特边数，计算每个数据比特的多个相干积分 从多个相干积分中选择对应于每个数据比特边缘的最可能的数据组合的相干积分，用针对每个数据比特边缘的非相干积分总和与对应于所选择的最可能数据比特的相干积分 对于每个数据位边沿的组合，在相干积分计算和非相干积分总更新的预定数量的步长之后，将每个数据位边缘的非相干积分总和与阈值进行比较，以及从非相干积分中识别代码延迟。 该方法还可以包括从对应于所识别的码延迟的估计多普勒频移来确定码延迟。 在该方法中，使用循环相关技术来计算相干积分，所述循环相关技术以这样的方式执行，使得相干积分在连续的步骤中彼此不相互独立。 因此，可以从在之前的步骤中计算的相干积分的后续使用中获得计算效率。 循环相关优选地在对应于数据位边缘之间的间隔的间隔上执行。

公开(公告)号：US20060115022A1

公开(公告)日：2006-06-01

申请号：US11290982

申请日：2005-11-30

申请人： Nesreen Ziedan ,  James Garrison

发明人： Nesreen Ziedan ,  James Garrison

IPC分类号： H04L27/06 ,  G01S5/14

CPC分类号： G01S19/29 ,  G01S19/243 ,  G01S19/246 ,  H04B7/01 ,  H04B17/327 ,  H04L2027/003 ,  H04L2027/0065

摘要： A method of acquiring a signal in a high dynamic environment includes generating a first set of acquired signal power values, the first set comprising an acquired signal power value for each Doppler bin in a plurality of Doppler bins over a first predetection integration time (PIT) interval for processing a digital signal, and generating a second set of acquired signal power values, the second set comprising an acquired signal power value for each Doppler bin in the plurality of Doppler bins over a second subsequent predetection integration time (PIT) interval for processing the digital signal. The first and the second sets are used to generate at least three additional sets of acquired signal power values. A new set of acquired power values is generated by selecting the maximum of the summations for each Doppler bin from the three additional sets, and a Doppler shift is identified from the Doppler bin having the maximum summation value that is greater than a threshold value. The output of this method may be used to initialize a first and a second extended Kalman filters for tracking a carrier signal and a code signal, respectively.

摘要翻译： 一种在高动态环境中获取信号的方法包括产生第一组获取的信号功率值，第一组包括在第一预测积分时间（PIT）中的多个多普勒频段中的每个多普勒频段的获取信号功率值， 用于处理数字信号的间隔，以及产生第二组获取的信号功率值，所述第二组包括在所述多个多普勒频段中的每个多普勒频带的获取信号功率值，用于在第二后续预检测积分时间（PIT）间隔上进行处理 数字信号。 第一组和第二组用于产生至少三组额外的采集信号功率值集合。 通过从三个附加集合中选择每个多普勒频带的最大和来产生一组新的获取的功率值，并且从具有大于阈值的最大求和值的多普勒频道识别多普勒频移。 该方法的输出可以用于初始化用于跟踪载波信号和码信号的第一和第二扩展卡尔曼滤波器。

公开(公告)号：US20050232338A1

公开(公告)日：2005-10-20

申请号：US11087065

申请日：2005-03-21

申请人： Nesreen Ziedan ,  James Garrison

发明人： Nesreen Ziedan ,  James Garrison

IPC分类号： G01S1/00 ,  H04B1/69 ,  H04B1/707 ,  H04L27/00

CPC分类号： G01S19/29 ,  G01S19/243 ,  G01S19/246 ,  H04B1/7077 ,  H04L2027/0065

摘要： A method acquires a location system signal where the location system signal includes a first data signal and a second data signal superimposed on the first data signal. The method includes generating an initial Doppler frequency offset value, the initial Doppler frequency offset representing a variance from a nominal frequency for the location system signal and a frequency of a received location system signal. The method also includes using the initial Doppler frequency offset value to generate a plurality of error signals, each error signal representing a difference between a sum of consecutive correlation values and a corresponding estimated ideal value. Each error signal corresponds to a different time offset and an associated time period in which the consecutive correlation values pertain. The second data signal has a bit edge that occurs during the time period of each of at least some of the sums of consecutive correlation values. A bit transition at the bit edge causes an increase in the error signal if the bit edge occurs during a time period associated with the error signal. The method also includes using a Kalman filter to generate a new initial Doppler frequency offset value, and generating new error signals.

摘要翻译： 方法获取位置系统信号，其中定位系统信号包括叠加在第一数据信号上的第一数据信号和第二数据信号。 该方法包括产生初始多普勒频率偏移值，初始多普勒频率偏移表示与定位系统信号的标称频率的差异以及接收的位置系统信号的频率。 该方法还包括使用初始多普勒频率偏移值来产生多个误差信号，每个误差信号表示连续相关值之和与对应的估计理想值之间的差值。 每个错误信号对应于不同的时间偏移和连续相关值所涉及的相关时间段。 第二数据信号具有在连续相关值的至少一些中的每一个的时间周期内发生的位边沿。 如果在与误差信号相关的时间周期内发生位边沿，则位位置处的位转换会引起误差信号的增加。 该方法还包括使用卡尔曼滤波器来产生新的初始多普勒频率偏移值，并产生新的误差信号。

公开(公告)号：US20050204621A1

公开(公告)日：2005-09-22

申请号：US11083875

申请日：2005-03-18

申请人： James Garrison

发明人： James Garrison

IPC分类号： A01G9/02

CPC分类号： A01G9/02

摘要： A panelized planter box system (10) and method which includes an upper rail (12), lower rail (14) and a group of sized side panels (16, 18) that are arranged to fit within the upper rail (12) and the lower rail (14). A group of rail corner brackets (30) is used for fastening corners of the lower rail (14) into a fixed position. The invention provides that the lower rail (14) is configured to deflect moisture from within the planter box. The invention may be customized into any number of configurations to give a clean and professional appearance in landscape architectural design projects.

摘要翻译： 一种镶嵌式花盆系统（10）和方法，其包括上轨道（12），下轨道（14）和一组尺寸大的侧板（16,18），其被布置成配合在上轨道（12）和 下轨道（14）。 一组轨道角支架（30）用于将下轨道（14）的角部固定到固定位置。 本发明提供的是，下轨道（14）构造成从花盆箱内偏转湿气。 本发明可以定制成任何数量的配置，以在景观建筑设计项目中给​​予干净和专业的外观。

公开(公告)号：US20070214994A1

公开(公告)日：2007-09-20

申请号：US11378416

申请日：2006-03-16

申请人： John Ardente ,  James Garrison

发明人： John Ardente ,  James Garrison

IPC分类号： B61B13/10

CPC分类号： B62D61/06 ,  E03F7/12 ,  F16L55/32

摘要： An apparatus (20) configured to effect personnel traverse though a pipeline (22) is presented. This apparatus (20) is suitable for pipelines (22) having an inner diameter (24) of not less than fifteen inches and not greater than thirty-six inches. The apparatus (20) is made up of a frame (26), a platform (28), a single drive wheel (40), and a pair of guidance wheels (72). An electric motor (48) is supported by a motor bracket (50) affixed to the frame (26). The motor (26) is coupled to the drive wheel (40) by a drive belt or chain (52). Each of the guidance wheels (72) has a plane of rotation (80), and is configured to contact an interior surface (36) of the pipeline (22) at a contact point (82) within that plane of rotation (80) when that plane of rotation (80) is substantially perpendicular to the interior surface (36) of the pipeline (22). This allows the apparatus (20) to automatically follow the curvature of the pipeline (22) during traverse.

摘要翻译： 呈现了通过管线（22）使人员穿过的装置（20）。 该装置（20）适合于具有不小于十五英寸且不大于三十六英寸的内径（24）的管线（22）。 设备（20）由框架（26），平台（28），单个驱动轮（40）和一对引导轮（72）组成。 电动机（48）由固定在框架（26）上的电动机支架（50）支撑。 马达（26）通过驱动带或链条（52）联接到驱动轮（40）。 每个引导轮（72）具有旋转平面（80），并且构造成在旋转平面（80）内的接触点（82）处与管道（22）的内表面（36）接触， 旋转平面（80）基本上垂直于管道（22）的内表面（36）。 这允许装置（20）在横移期间自动地跟随管道（22）的曲率。