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1. 发明授权

US07030814B2 System and method to estimate the location of a receiver in a multi-path environment 有权
标题翻译：用于估计接收机在多路径环境中的位置的系统和方法
公开(公告)号：US07030814B2
公开(公告)日：2006-04-18
申请号：US10237556
申请日：2002-09-06
申请人： Jesse Stone , Stefano Casadei , Wallace Mann , Benjamin Van Roy
发明人： Jesse Stone , Stefano Casadei , Wallace Mann , Benjamin Van Roy
IPC分类号： G01S3/02
CPC分类号： G01S11/10 , G01S19/22 , G01S19/30 , G01S19/42 , G01S19/50 , G01S19/52
摘要： System and method to determine the location of a receiver in a multipath environment are provided. The received signal is correlated with the reference signals associated with the transmitting sources. Each correlation function is processed to derive various types of signal constraints, such as probability densities and uncertainty regions or intervals. In some embodiments, these constraints are for the code-phases and the Doppler frequencies. These signal constraints are transformed into constraints on the receiver variables and then fused together into a unified receiver constraint. A-priori constraints, such as constraints on the location of the receiver or the timestamp, may be incorporated into the unified receiver constraint. Some embodiments estimate a location based also on the estimated Doppler frequency. The constraints used by the invention are based on models of multipath effects and are geared towards mitigating these effects. In one of these models, a probability density for code-phase is obtained by convolving a gaussian distribution with an exponential distribution that describes the extra delay introduced by multipath. Another approach is based on identifying outliers in the set of code-phases. In other approaches, uncertainty region constraints and probability densities are combined. The present invention achieves faster and more sensitive signal acquisition and higher location accuracy in multipath environment, without compromising performance in other environments.
摘要翻译：提供了确定多径环境中接收机位置的系统和方法。所接收的信号与与发射源相关联的参考信号相关。处理每个相关函数以导出各种类型的信号约束，例如概率密度和不确定性区域或间隔。在一些实施例中，这些约束适用于码相位和多普勒频率。这些信号约束被转换成对接收机变量的约束，然后融合在一起成为统一的接收机约束。诸如对接收机的位置或时间戳的限制的先验约束可以被并入到统一接收机约束中。一些实施例还基于估计的多普勒频率估计位置。本发明使用的约束基于多径效应的模型，并且旨在减轻这些影响。在这些模型之一中，代码相位的概率密度通过使用描述由多径引入的额外延迟的指数分布进行卷积高斯分布来获得。另一种方法是基于在一组代码阶段中识别异常值。在其他方法中，组合不确定性区域约束和概率密度。本发明在多路径环境中实现更快，更灵敏的信号采集和更高的定位精度，而不会影响其他环境中的性能。

2. 发明授权

US06836241B2 Method for optimal search scheduling in satellite acquisition 有权
标题翻译：卫星采集最佳搜索调度方法
公开(公告)号：US06836241B2
公开(公告)日：2004-12-28
申请号：US10126853
申请日：2002-04-19
申请人： Jesse Stone , Andrew Chou , Wallace Mann
发明人： Jesse Stone , Andrew Chou , Wallace Mann
IPC分类号： G01S514
CPC分类号： G01S19/24 , G01S19/28 , G01S19/29 , G01S19/30
摘要： A method in a Global Positioning System (GPS) receiver achieves enhanced performance by scheduling searches in the Doppler search space according to a cost function. The cost function relates to both the cost of building a 3-dimensional correlation grid and the cost of searching satellite, code phase, Doppler and integration time interval spaces for values that provide a maximum in the correlation grid. In one embodiment, after the clock Doppler is determined upon acquiring one satellite, the Doppler search range associated with a cell in the grid is dominated by the receiver's own motion. The scheduler schedules searching of the Doppler search space using search ranges determined empirically by the expected receiver velocity. In one embodiment, the scheduler increases integration times before changing Doppler search ranges, which require a recalculation of the grid.
摘要翻译：全球定位系统（GPS）接收机中的方法通过根据成本函数调度多普勒搜索空间中的搜索来实现增强的性能。成本函数涉及建立三维相关网格的成本和搜索卫星的成本，码相位，多普勒和积分时间间隔，以便在相关网格中提供最大值。在一个实施例中，在获取一个卫星之后确定时钟多普勒时，与网格中的小区相关联的多普勒搜索范围由接收机自己的运动支配。调度器使用由经验预测的接收机速度确定的搜索范围来调度多普勒搜索空间的搜索。在一个实施例中，调度器在改变需要重新计算网格的多普勒搜索范围之前增加集成时间。

3. 发明授权

US06757610B1 Method for rapid location determination using parametric values obtained in a previous location determination 有权
标题翻译：使用在先前位置确定中获得的参数值进行快速位置确定的方法
公开(公告)号：US06757610B1
公开(公告)日：2004-06-29
申请号：US10068187
申请日：2002-02-04
申请人： Wallace Mann , Jesse Stone
发明人： Wallace Mann , Jesse Stone
IPC分类号： G06C2100
CPC分类号： G01S19/29
摘要： A method for providing an initial estimate for an interval of possible values for a parameter used in an acquisition of a signal maintains parameter values obtained from previous signal acquisitions and the times at which the signal acquisitions were made. The maintained values of the parameter are used to derive a candidate value for the parameter to be used in a new signal acquisition. To make the maintained values available even after a brief period during which the GPS receiver is powered down, the maintained values can be stored in a non-volatile memory. The signal acquisitions may correspond to GPS satellite signal acquisitions, and the maintained parameter values can be grouped according to whether a successful receiver location determination was accomplished.
摘要翻译：提供用于在获取信号中使用的参数的可能值的间隔的初始估计的方法维持从先前信号获取获得的参数值和进行信号采集的时间。参数的维持值用于导出新信号采集中要使用的参数的候选值。为使即使在GPS接收机掉电的短暂时间内仍可使用维护值，维护值可以存储在非易失性存储器中。信号采集可以对应于GPS卫星信号采集，并且维持的参数值可以根据成功的接收机位置确定是否被完成来分组。

4. 发明授权

US07313207B2 Reducing memory usage in noncoherent signal processing 有权
标题翻译：减少非相干信号处理中的内存使用
公开(公告)号：US07313207B2
公开(公告)日：2007-12-25
申请号：US10765651
申请日：2004-01-26
申请人： Julien Basch , Andrew Chou , Robert Lorenz , Jesse Stone
发明人： Julien Basch , Andrew Chou , Robert Lorenz , Jesse Stone
IPC分类号： H03D1/00
CPC分类号： G01S19/30 , G01S19/37 , H04B2201/70715
摘要： A method for detecting a positioning signal includes (a) correlating a segment of a received positioning signal with a reference signal of a selected code phase and frequency to obtain a correlation value, (b) if the correlation value is less than a predetermined minimum, assigning the correlation value to the predetermined minimum, and (c) accumulating the correlation value in a sum of correlation values obtained using other segments of the received positioning signal. In addition, the correlation value may be reduced by a predetermined value, which is preferably an expected mean value for a noise component in the segment of the received positioning signal.
摘要翻译：一种检测定位信号的方法包括：（a）将接收到的定位信号的一段与所选码相位和频率的参考信号相关以获得相关值，（b）如果相关值小于预定最小值，将所述相关值分配给所述预定的最小值，以及（c）将所述相关值累加在使用所接收的定位信号的其他部分获得的相关值之和中。此外，可以将相关值减小预定值，该预定值优选地是接收到的定位信号的段中的噪声分量的预期平均值。

5. 发明授权

US07002514B2 Using multiple detection algorithms in positioning signal processing 有权
标题翻译：在定位信号处理中使用多种检测算法
公开(公告)号：US07002514B2
公开(公告)日：2006-02-21
申请号：US10759921
申请日：2004-01-15
申请人： Julien Basch , Andrew Chou , Robert Lorenz , Jesse Stone
发明人： Julien Basch , Andrew Chou , Robert Lorenz , Jesse Stone
IPC分类号： H04B7/185
CPC分类号： G01S19/28 , G01S19/235
摘要： A systematic method for acquiring positioning signals, such as global positioning system (GPS) signals, uses different signal detection algorithms at different stages of signal detection. For example, a method for detecting multiple positioning signals may include first detecting a first positioning signal using a robust but less sensitive signal detection method, such as non-coherent integration. Based on the signal parameter values that allow detection of the first positional signal, detecting a second positioning signal using a more sensitive method, such as coherent integration. In this manner, by capturing the strongest signal first using a robust method, signal detection parameter values common to positioning signals can be narrowed to allow subsequent signal acquisitions using a more sensitive—but computationally more intensive—method.
摘要翻译：用于获取定位信号的系统方法，如全球定位系统（GPS）信号，在信号检测的不同阶段使用不同的信号检测算法。例如，用于检测多个定位信号的方法可以包括首先使用鲁棒但不太灵敏的信号检测方法来检测第一定位信号，例如非相干积分。基于允许检测第一位置信号的信号参数值，使用诸如相干积分的更敏感的方法来检测第二定位信号。以这种方式，通过使用鲁棒的方法首先捕获最强信号，可以缩小定位信号共同的信号检测参数值，以便使用更灵敏但计算更密集的方法来进行后续信号采集。

6. 发明申请

US20050093740A1 System and method for estimating clock acceleration and location determination 有权
标题翻译：用于估计时钟加速度和位置确定的系统和方法
公开(公告)号：US20050093740A1
公开(公告)日：2005-05-05
申请号：US10696892
申请日：2003-10-29
申请人： Jesse Stone
发明人： Jesse Stone
IPC分类号： G01S19/21 , G01S1/00 , G01S19/26 , G01S5/14
CPC分类号： G01S19/23 , G01S19/29
摘要： A method and a system for a location determination (a) acquire a first positioning signal; (b) analyze the first positioning signal to provide an estimate of a clock signal acceleration; (c) acquire additional positioning signals based on the estimate of the clock signal acceleration; and (d) perform the location determination using the first positioning signal and the additional positioning signals. The additional positioning signals may be acquired using a stacking technique. The first positioning signal may be acquired based on a signal-to-noise ratio exceeding a predetermined threshold. Clock signal acceleration may be estimated using a constant clock signal acceleration parametric model, which may be parabolic model based on a function that depends on the clock signal acceleration, a clock Doppler and an initial phase value. Alternatively, grids of various granularity may be searched clock signal acceleration space and a clock Doppler space in the vicinity of a clock Doppler value measured in the acquisition of the first positioning signal.
摘要翻译：一种用于位置确定的方法和系统（a）获取第一定位信号; （b）分析第一定位信号以提供时钟信号加速度的估计; （c）基于时钟信号加速度的估计获得附加定位信号; 和（d）使用第一定位信号和附加定位信号执行位置确定。可以使用堆叠技术来获取附加的定位信号。可以基于超过预定阈值的信噪比来获取第一定位信号。可以使用恒定时钟信号加速度参数模型来估计时钟信号加速度，其可以是基于取决于时钟信号加速度，时钟多普勒和初始相位值的函数的抛物线模型。或者，可以搜索各种粒度的网格时钟信号加速空间和在获取第一定位信号时测量的时钟多普勒值附近的时钟多普勒空间。

7. 发明授权

US07680223B2 Reducing memory usage in noncoherent signal processing 有权
标题翻译：减少非相干信号处理中的内存使用
公开(公告)号：US07680223B2
公开(公告)日：2010-03-16
申请号：US11963360
申请日：2007-12-21
申请人： Julien Basch , Andrew Chou , Robert Lorenz , Jesse Stone
发明人： Julien Basch , Andrew Chou , Robert Lorenz , Jesse Stone
IPC分类号： H03D1/00
CPC分类号： G01S19/30 , G01S19/37 , H04B2201/70715
摘要： A method for detecting a positioning signal includes (a) correlating a segment of a received positioning signal with a reference signal of a selected code phase and frequency to obtain a correlation value, (b) if the correlation value is less than a predetermined minimum, assigning the correlation value to the predetermined minimum, and (c) accumulating the correlation value in a sum of correlation values obtained using other segments of the received positioning signal. In addition, the correlation value may be reduced by a predetermined value, which is preferably an expected mean value for a noise component in the segment of the received positioning signal.
摘要翻译：一种检测定位信号的方法包括：（a）将接收到的定位信号的一段与所选码相位和频率的参考信号相关以获得相关值，（b）如果相关值小于预定最小值，将所述相关值分配给所述预定的最小值，以及（c）将所述相关值累加在使用所接收的定位信号的其他部分获得的相关值之和中。此外，可以将相关值减小预定值，该预定值优选地是接收到的定位信号的段中的噪声分量的预期平均值。

8. 发明申请

US20080098056A1 REDUCING MEMORY USAGE IN NONCOHERENT SIGNAL PROCESSING 有权
标题翻译：减少非易失性信号处理中的存储器使用
公开(公告)号：US20080098056A1
公开(公告)日：2008-04-24
申请号：US11963360
申请日：2007-12-21
申请人： Julien Basch , Andrew Chou , Robert Lorenz , Jesse Stone
发明人： Julien Basch , Andrew Chou , Robert Lorenz , Jesse Stone
IPC分类号： G06F17/15 , H04L27/06
CPC分类号： G01S19/30 , G01S19/37 , H04B2201/70715
摘要： A method for detecting a positioning signal includes (a) correlating a segment of a received positioning signal with a reference signal of a selected code phase and frequency to obtain a correlation value, (b) if the correlation value is less than a predetermined minimum, assigning the correlation value to the predetermined minimum, and (c) accumulating the correlation value in a sum of correlation values obtained using other segments of the received positioning signal. In addition, the correlation value may be reduced by a predetermined value, which is preferably an expected mean value for a noise component in the segment of the received positioning signal.
摘要翻译：一种检测定位信号的方法包括：（a）将接收到的定位信号的一段与所选码相位和频率的参考信号相关以获得相关值，（b）如果相关值小于预定最小值，将所述相关值分配给所述预定的最小值，以及（c）将所述相关值累加在使用所接收的定位信号的其他部分获得的相关值之和中。此外，可以将相关值减小预定值，该预定值优选地是接收到的定位信号的段中的噪声分量的预期平均值。

9. 发明授权

US07102567B2 System and method for estimating clock acceleration and location determination 有权
标题翻译：用于估计时钟加速度和位置确定的系统和方法
公开(公告)号：US07102567B2
公开(公告)日：2006-09-05
申请号：US10696892
申请日：2003-10-29
申请人： Jesse Stone
发明人： Jesse Stone
IPC分类号： G01S5/14
CPC分类号： G01S19/23 , G01S19/29
摘要： A method and a system for a location determination (a) acquire a first positioning signal; (b) analyze the first positioning signal to provide an estimate of a clock signal acceleration; (c) acquire additional positioning signals based on the estimate of the clock signal acceleration; and (d) perform the location determination using the first positioning signal and the additional positioning signals. The additional positioning signals may be acquired using a stacking technique. The first positioning signal may be acquired based on a signal-to-noise ratio exceeding a predetermined threshold. Clock signal acceleration may be estimated using a constant clock signal acceleration parametric model, which may be parabolic model based on a function that depends on the clock signal acceleration, a clock Doppler and an initial phase value. Alternatively, grids of various granularity may be searched clock signal acceleration space and a clock Doppler space in the vicinity of a clock Doppler value measured in the acquisition of the first positioning signal.
摘要翻译：一种用于位置确定的方法和系统（a）获取第一定位信号; （b）分析第一定位信号以提供时钟信号加速度的估计; （c）基于时钟信号加速度的估计获得附加定位信号; 和（d）使用第一定位信号和附加定位信号执行位置确定。可以使用堆叠技术来获取附加的定位信号。可以基于超过预定阈值的信噪比来获取第一定位信号。可以使用恒定时钟信号加速度参数模型来估计时钟信号加速度，其可以是基于取决于时钟信号加速度，时钟多普勒和初始相位值的函数的抛物线模型。或者，可以搜索各种粒度的网格时钟信号加速空间和在获取第一定位信号时测量的时钟多普勒值附近的时钟多普勒空间。

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