专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06724343B2 Weak signal and anti-jamming Global Positioning System receiver and method using full correlation grid 有权
标题翻译：弱信号和抗干扰全球定位系统接收机和采用全相关网格的方法
公开(公告)号：US06724343B2
公开(公告)日：2004-04-20
申请号：US10422544
申请日：2003-04-24
申请人： Mark S. Asher , Lloyd A. Linstrom , Robert L. Henderson , Dennis J. Duven
发明人： Mark S. Asher , Lloyd A. Linstrom , Robert L. Henderson , Dennis J. Duven
IPC分类号： B01S514
CPC分类号： G01S19/21 , G01S19/24 , G01S19/26
摘要： Disclosed is a system and method for increasing the weak signal recovery capability of a Global Positioning System (GPS) receiver correlating each of the plurality of digital signals by multiplying the I and Q phases by the carrier and code, adding a location offset, accumulating the results of the correlation, and latching the results until a predetermined time; coherent combining the accumulated results at the predetermined time; non-coherent combining the coherent combined results for a time period sufficient to raise a correlation peak to a predetermined point above a noise floor to produce a plurality of non-coherent bin observables; determining a maximum value of the plurality of bin observables and comparing the maximum value to predetermined threshold; determining grid locations of bin observables having maximum values greater than the predetermined threshold; determining a bi-quadratic surface using the grid locations; determining an argument maximum of the bi-quadratic surface; estimating epoch pseudorange and Doppler variables based on the argument maximum; estimating errors in at least one of position, velocity, orientation, user clock, frequency, and ionosphere states on the estimated epoch pseudorange and Doppler variables; and determining at least one of position, velocity and orientation by correcting for the estimated errors.
摘要翻译：公开了一种用于增加全球定位系统（GPS）接收机的弱信号恢复能力的系统和方法，其通过将I和Q相位与载波和码相乘来相加多个数字信号中的每一个，添加位置偏移量，相关的结果，并将结果锁定到预定时间; 在预定时间内相加组合累积结果; 将相干组合结果的非相干组合足够的时间段以将相关峰值提高到噪声本底以上的预定点，以产生多个非相干二叉管可观察值; 确定所述多个箱可观测值的最大值，并将所述最大值与预定阈值进行比较; 确定具有大于所述预定阈值的最大值的二进制可观察值的网格位置; 使用所述网格位置确定二次曲面; 确定双二次曲面的参数最大值; 基于参数最大值估计时代伪距和多普勒变量; 在估计的时代伪距和多普勒变量上估计位置，速度，方向，用户时钟，频率和电离层状态中的至少一个中的误差; 以及通过校正估计的误差来确定位置，速度和方向中的至少一个。

2. 发明授权

US06608589B1 Autonomous satellite navigation system 有权
标题翻译：自主卫星导航系统
公开(公告)号：US06608589B1
公开(公告)日：2003-08-19
申请号：US09295544
申请日：1999-04-21
申请人： William S. Devereux , Robert J. Heins , Albert A. Chacos , Lloyd A. Linstrom , Mark S. Asher , Dennis J. Duven , Don M. Gruenbacher , Thomas L. Kusterer , Kim Strohbehn , Richard C. Morgan
发明人： William S. Devereux , Robert J. Heins , Albert A. Chacos , Lloyd A. Linstrom , Mark S. Asher , Dennis J. Duven , Don M. Gruenbacher , Thomas L. Kusterer , Kim Strohbehn , Richard C. Morgan
IPC分类号： G01S514
CPC分类号： G01S19/14 , G01C21/00 , G01S19/37 , G01S19/54
摘要： An autonomous navigation system for an orbital platform incorporating a global positioning system based navigation device optimized for low-Earth orbit and medium-Earth orbit applications including a 12-channel, GPS tracking application-specific integrated circuit operating in concert with a microprocessor implementing an extended Kalman filter and orbit propagator which autonomously generates estimates of position, velocity, and time to enable planing, prediction and execution of event-based commanding of mission operations.
摘要翻译：一种用于轨道平台的自主导航系统，其结合了针对低地球轨道和中地球轨道应用而优化的全球定位系统的导航装置，包括与实施扩展的微处理器一致的12通道GPS跟踪应用专用集成电路卡尔曼滤波器和轨道传播器，其自主地产生位置，速度和时间的估计，以实现对任务操作的基于事件的指挥的计划，预测和执行。

3. 发明授权

US06859170B2 Extended kalman filter for autonomous satellite navigation system 有权
标题翻译：用于自主卫星导航系统的扩展卡尔曼滤波器
公开(公告)号：US06859170B2
公开(公告)日：2005-02-22
申请号：US10331691
申请日：2002-12-30
申请人： William S. Devereux , Albert A. Chacos , Mark S. Asher , Dennis J. Duven , Thomas L. Kusterer , Richard C. Morgan
发明人： William S. Devereux , Albert A. Chacos , Mark S. Asher , Dennis J. Duven , Thomas L. Kusterer , Richard C. Morgan
IPC分类号： G01C21/24 , B60R16/02 , B64G1/10 , G01C21/00 , G01S1/00 , G01S5/10 , G01S19/05 , G01S19/11 , G01S19/21 , G01S19/29 , G01S19/46 , G01S5/14
CPC分类号： G01S19/14 , G01C21/00 , G01S19/37 , G01S19/54
摘要： An autonomous navigation system for an orbital platform incorporating a global positioning system based navigation device optimized for low-Earth orbit and medium-Earth orbit applications including a 12 channel, GPS tracking application-specific integrated circuit (15) operating in concert with a computer system (90) implementing an extended Kalman filter and orbit propagator which autonomously generates estimates of position, velocity and time to enable planning, prediction and execution of event-based commanding of mission operations.
摘要翻译：一种用于轨道平台的自主导航系统，包括针对低地球轨道和中地球轨道应用而优化的基于全球定位系统的导航装置，包括与计算机系统协同工作的12通道GPS跟踪应用专用集成电路（15）（90）实现扩展卡尔曼滤波器和轨道传播器，其自主地产生位置，速度和时间的估计，以使得能够规划，预测和执行基于事件的指挥任务操作。

4. 发明授权

US08325086B2 Methods and systems to diminish false-alarm rates in multi-hypothesis signal detection through combinatoric navigation 有权
标题翻译：通过组合导航减少多重假设信号检测中的误报率的方法和系统
公开(公告)号：US08325086B2
公开(公告)日：2012-12-04
申请号：US12767158
申请日：2010-04-26
申请人： Stephen J. Stafford , Mark S. Asher , Martin G. Sommerville , Lloyd A. Linstrom , Thomas L. Kusterer
发明人： Stephen J. Stafford , Mark S. Asher , Martin G. Sommerville , Lloyd A. Linstrom , Thomas L. Kusterer
IPC分类号： G01S19/42 , G01S19/38
CPC分类号： G01S19/28 , G01S19/37
摘要： Methods and systems to detect navigation signals, including to identify up to multiple range-Doppler hypotheses from each of j range-Doppler correlation grids based on a relatively low first threshold, generate navigation solutions from combinatorial sets of k of the identified hypotheses, evaluate the navigation solutions to identify plausible solutions, iteratively and combinatorially augment the plausible solutions with additional hypotheses from grids that are not represented in the corresponding k-hypotheses based navigation solutions, replace plausible solutions with corresponding augmented plausible solutions when appropriate, and select one of a plurality of plausible solutions as a best plausible solution, j and k being positive integers. Where a grid energy peak exceeds a second threshold, a corresponding hypothesis may be identified as a sole hypothesis for the corresponding navigation signal. The relatively low first threshold permits detection of weaker signals. Subsequent evaluations effectively transform a per-navigation-signal false alarm rate to per-navigation-solution false alarm rate.
摘要翻译：检测导航信号的方法和系统，包括基于相对较低的第一阈值从j范围 - 多普勒相关网格中确定多达多范围多普勒假设，从识别的假设的k个组合集合中产生导航解，导航解决方案，用于识别合理的解决方案，迭代地并组合地增加似乎合理的解决方案，其中来自不在相应的基于k-假设的导航解决方案中未表示的网格的附加假设，在适当时用相应的增强似然解决方案替换合理的解，并选择多个最合理的解决方案是最合理的解决方案，j和k是正整数。在电网能量峰值超过第二阈值的情况下，相应的假设可以被识别为相应导航信号的唯一假设。相对较低的第一阈值允许检测较弱的信号。随后的评估有效地将每导航信号的误报率变换为每导航解决方案的虚警率。

5. 发明申请

US20100271259A1 Methods and Systems to Diminish False-Alarm Rates in Multi-Hypothesis Signal Detection Through Combinatoric Navigation 有权
标题翻译：通过组合导航在多假设信号检测中减少虚警率的方法和系统
公开(公告)号：US20100271259A1
公开(公告)日：2010-10-28
申请号：US12767158
申请日：2010-04-26
申请人： Stephen J. Stafford , Mark S. Asher , Martin G. Sommerville , Lloyd A. Linstrom , Thomas L. Kusterer
发明人： Stephen J. Stafford , Mark S. Asher , Martin G. Sommerville , Lloyd A. Linstrom , Thomas L. Kusterer
IPC分类号： G01S19/38
CPC分类号： G01S19/28 , G01S19/37
摘要： Methods and systems to detect navigation signals, including to identify up to multiple range-Doppler hypotheses from each of j range-Doppler correlation grids based on a relatively low first threshold, generate navigation solutions from combinatorial sets of k of the identified hypotheses, evaluate the navigation solutions to identify plausible solutions, iteratively and combinatorially augment the plausible solutions with additional hypotheses from grids that are not represented in the corresponding k-hypotheses-based navigation solutions, replace plausible solutions with corresponding augmented plausible solutions when appropriate, and select one of a plurality of plausible solutions as a best plausible solution. Where a grid energy peak exceeds a second threshold, a corresponding hypothesis may be identified as a sole hypothesis for the corresponding navigation signal. The relatively low first threshold permits detection of weaker signals. Subsequent evaluations effectively transform a per-navigation-signal false alarm rate to per-navigation-solution false alarm rate.
摘要翻译：检测导航信号的方法和系统，包括基于相对较低的第一阈值从j范围 - 多普勒相关网格中确定多达多范围多普勒假设，从识别的假设的k个组合集合中产生导航解，导航解决方案，用于识别合理的解决方案，迭代地并组合地增加似乎合理的解决方案，其中来自网格的额外假设在相应的基于k-假设的导航解决方案中未被表示，并在合适的情况下用相应的增强似然解决方案代替合理的解决方案，并且选择多个合理的解决方案是最好的合理解决方案。在电网能量峰值超过第二阈值的情况下，相应的假设可以被识别为相应导航信号的唯一假设。相对较低的第一阈值允许检测较弱的信号。随后的评估有效地将每导航信号的误报率变换为每导航解决方案的虚警率。

6. 发明授权

US06859690B2 Method for using GPS and crosslink signals to correct ionospheric errors in space navigation solutions 有权
标题翻译：使用GPS和交叉信号校正空间导航解决方案中电离层误差的方法
公开(公告)号：US06859690B2
公开(公告)日：2005-02-22
申请号：US10383320
申请日：2003-03-07
申请人： Mark S. Asher , Eric A. Olsen , Patrick A. Stadter
发明人： Mark S. Asher , Eric A. Olsen , Patrick A. Stadter
IPC分类号： G01S19/05 , G01S19/11 , G01S19/21 , G01S19/29 , G01S19/46 , G06F7/00 , G06F19/00
CPC分类号： G01S19/40
摘要： A method of correcting ionospheric delays induced in received signals by space systems is disclosed. The method takes advantage of received GPS signals and received crosslink signals among spacecraft to estimate the effect of ionospheric delays and correct for such delays in the computation of the range estimation between spacecraft. The method generates and initial estimate of the ionospheric delay by tracking pseudorandom codes on both GPS and crosslink signals at known frequencies to correct an initial relative range vector. Using the corrected range vector generated from the use of code, the method subsequently estimates a more precise correction by considering the carrier phase error as induced by ionospheric delay. This includes estimate the integer ambiguities on both the GPS signals and the crosslink signals iteratively and subsequently estimating a more precise ionospheric delay correction with is applied to the relative position vector using the carrier phase measurements. The method is also applicable to non-navigation applications including measuring dynamic ionospheric structure and variability over a wide range of scale sizes, thereby greatly improving operational models of navigation and communications, and improving interdependent models of atmospheric, ionospheric, magnetospheric, and space weather physics and prediction.
摘要翻译：公开了一种通过空间系统校正在接收信号中诱发的电离层延迟的方法。该方法利用接收的GPS信号，并在航天器之间接收到交叉信号，以估计电离层延迟的影响，并对航天器范围估计的计算中的这种延迟进行纠正。该方法通过在已知频率上跟踪GPS和交联信号上的伪随机码来产生和初始估计电离层延迟，以校正初始相对范围向量。使用从代码使用产生的校正范围向量，该方法随后通过考虑由电离层延迟引起的载波相位误差来估计更精确的校正。这包括迭代地估计GPS信号和交联信号上的整数模糊度，随后使用载波相位测量将相对位置矢量应用于更精确的电离层延迟校正。该方法还适用于非导航应用，包括测量动态电离层结构和范围广泛的尺度范围内的变异性，从而大大提高导航和通信的运行模型，并改善大气，电离层，磁层和空间天气物理学的相互依赖模型和预测。

7. 发明授权

US4417448A Means for producing an optimized cooler expander waveform 失效
标题翻译：用于生产优化的冷却器膨胀器波形的方法
公开(公告)号：US4417448A
公开(公告)日：1983-11-29
申请号：US341028
申请日：1982-01-20
申请人： Stuart B. Horn , Richard A. Wright , Mark S. Asher
发明人： Stuart B. Horn , Richard A. Wright , Mark S. Asher
IPC分类号： F25B9/14 , H02K33/14 , F25B9/00
CPC分类号： F25B9/14 , H02K33/14
摘要： A means for producing an optimized cooler expander waveform for a closed le cryogenic cooler. The cooler displacer is driven by magnetic and spring biasing means through four repeated phases of each cycle to produce four portions of the optimized cooler waveform in which each portion takes up about 25% of the total cycle. The portions are comprised of a constant velocity in opposite direction and dwell times with smoothed corner transitions between each portion. Control means for controlling the displacer movement to produce the specific waveform may be provided by a function generator applying the desired waveform into a displacer control drive circuit which has as a second input a sensory signal of the actual position of the displacer. The actual position and the desired position are continuously compared while the drive circuit drives two opposing solenoids during the constant velocity phases of the displacer movement with two spring biasing means holding the displacer during the dwell times at the end of each stroke.
摘要翻译：一种用于为封闭循环低温冷却器生产优化的冷却器膨胀器波形的装置。冷却器置换器由磁性和弹簧偏置装置通过每个循环的四个重复相位驱动，以产生四个部分的优化的冷却器波形，其中每个部分占总周期的约25％。这些部分由相反方向上的恒定速度和停留时间组成，并且在每个部分之间具有平滑的拐角转变。用于控制置换器移动以产生特定波形的控制装置可以由函数发生器提供，函数发生器将期望的波形应用到置换器控制驱动电路中，该置换器控制驱动电路具有作为置换器的实际位置的感觉信号作为第二输入。当驱动电路在置换器移动的恒定速度相位期间驱动两个相对的螺线管时，实际位置和期望的位置被连续地比较，两个弹簧偏置装置在每个行程结束的停留时间期间保持置换器。

8. 发明授权

US4277948A Cryogenic cooler with annular regenerator and clearance seals 失效
标题翻译：带有环形再生器和间隙密封件的低温冷却器
公开(公告)号：US4277948A
公开(公告)日：1981-07-14
申请号：US163853
申请日：1980-06-27
申请人： Stuart B. Horn , Mark S. Asher , Howard L. Dunmire
发明人： Stuart B. Horn , Mark S. Asher , Howard L. Dunmire
IPC分类号： F25B9/14 , F25B9/00
CPC分类号： F25B9/14 , F25B2309/003
摘要： A Stirling Cooler with a three stage cold finger. The finger includes a sped displacer in a stepped cylinder. The cylinder is loosely surrounded by an outer shell, with regenerator material in the space between the outer shell and the cylinder. The displacer-cylinder define three swept expansion spaces each communicating with the regenerator space. Clearance seals exist between the displacer and the cylinder because of small diametrical clearance and long axial length with respect to the diametrical clearance.
摘要翻译：一个带有三级冷手指的斯特林冷却器。手指包括阶梯式气缸中的阶梯式置换器。气缸松动地被外壳包围，再生器材料在外壳和气缸之间的空间中。置换器缸定义了三个与再生器空间连通的扫掠膨胀空间。间隙密封件存在于置换器和气缸之间，因为相对于直径间隙的小直径间隙和长的轴向长度。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式