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. 发明申请

WO2003001234A3 EXTRACTING FINE-TUNED ESTIMATES FROM CORRELATION FUNCTIONS EVALUATED AT A LIMITED NUMBER OF VALUES 审中-公开
公开(公告)号：WO2003001234A3
公开(公告)日：2003-01-03
申请号：PCT/US2002/019964
申请日：2002-06-21
申请人： ENUVIS, INC. , SAHAI, Anant , TSITSIKLIS, John , CASADEI, Stefano , CHOU, Andrew , VAN ROY, Benjamin , STONE, Jesse, R
发明人： SAHAI, Anant , TSITSIKLIS, John , CASADEI, Stefano , CHOU, Andrew , VAN ROY, Benjamin , STONE, Jesse, R
IPC分类号： G01S5/14
摘要： Techniques are provided for fine-tuning estimates of a delay value for a sampled signal. One aspect of the invention is to perform, for the sampled signal, coarse-grained calculations of the In Phase and Quadrature (I and Q) correlation integrals at a limited number of points, wherein the calculations are performed over a range of hypothesized delay values. A range of delay values of interest are then determined from the coarse-grained calculations of the I and Q correlation integrals. A subset of I and Q values based on the coarse granularity calculations of the I and Q correlation functions is used to perform a time-domain interpolation to obtain fine-grained values of the I and Q integrals in the range of the delay values of interest. Magnitude calculations are performed based on the fine-grained values of the I and Q integrals. Fine-tuned estimates of delay value are based on the magnitude calculations. Alternatively, fine-tuned estimates of delay value are based on the template-matching approach.

2. 发明申请

WO2003001229A2 DETERMINING THE SPATIO-TEMPORAL AND KINEMATIC PARAMETERS OF A SIGNAL RECEIVER AND ITS CLOCK BY INFORMATION FUSION 审中-公开
标题翻译：通过信息融合确定信号接收器及其时钟的时空和动态参数
公开(公告)号：WO2003001229A2
公开(公告)日：2003-01-03
申请号：PCT/US2002/019893
申请日：2002-06-21
申请人： ENUVIS, INC. , SAHAI, Anant , CHOU, Andrew , MANN, Wallace , CASADEI, Stefano
发明人： SAHAI, Anant , CHOU, Andrew , MANN, Wallace , CASADEI, Stefano
IPC分类号： G01S
CPC分类号： G01S19/24 , G01S19/23
摘要： Techniques are provided for determining clock doppler of a signal receiver. One aspect of the invention is to divide sampled data received from a receiver into data segments of incremental length. The clock doppler is estimated based on each data segment with respect to all the satellites from a set of satellites that is overhead the receiver. For each data segment , the results with respect to each satellite is used to refine the calculations of the clock doppler with respect to the next satellite. When the clock doppler calculations have been performed using all the satellites from the set of satellites for a particular data segment , then the results with respect to the particular data segment is used to refine the calculations of the clock doppler with respect to the next data segment .
摘要翻译：提供了用于确定信号接收机的时钟多普勒的技术。本发明的一个方面是将从接收机接收的采样数据分成具有递增长度的数据段。基于每个数据段估计时钟多普勒，相对于来自接收机开销的一组卫星的所有卫星。对于每个数据段，使用关于每个卫星的结果来细化关于下一个卫星的时钟多普勒的计算。当使用针对特定数据段的卫星组中的所有卫星执行时钟多普勒计算时，相对于特定数据段的结果被用于细化关于下一个数据段的时钟多普勒的计算。

3. 发明申请

WO2006005077A2 HIERARCHICAL OPTIMIZATION METHOD AND SYSTEM FOR PATTERN RECOGNITION AND EDGE DETECTION 审中-公开
标题翻译：用于模式识别和边缘检测的分层优化方法和系统
公开(公告)号：WO2006005077A2
公开(公告)日：2006-01-12
申请号：PCT/US2005/023913
申请日：2005-06-30
申请人： CASADEI, Stefano
发明人： CASADEI, Stefano
IPC分类号： G06K9/68
CPC分类号： G06K9/6206 , G06K9/6282 , G06T7/12 , G06T2207/20016 , G06T2207/20164
摘要： A method and a system for pattern recognition utilizes an ensemble of reference patterns to represent the possible instances of the models to be recognized; constructs a hierarchy of estimators to simplify and enhance the recognition of the models of interest; approximates complex reference patterns with linear compositions of simpler patterns; fragments complex patterns into local patterns so that interference between the local patterns is sufficiently small for linearization methods to be applicable; constructs estimators during an offline stage to offload calculations from the online signal processing stage; designs model estimators based on optimization principles to enhance performance and to provide performance metrics for the the estimated model instances; generates a hierarchy of reference descriptors during the offline stage, which are used for the design and construction of the model estimators. Specific examples are provided for the recognition of image features such as edges and junctions.
摘要翻译：用于模式识别的方法和系统利用参考模式的集合来表示待识别的模型的可能实例; 构建估计器的层次结构以简化和增强对感兴趣模型的识别; 使用简单模式的线性组合逼近复杂的参考模式; 将复杂图案分解成局部图案，使得局部图案之间的干扰足够小以使线性化方法可适用; 在离线阶段构建估计器以从在线信号处理阶段卸载计算; 基于优化原则设计模型估计器以提高性能并为估计的模型实例提供性能度量; 在离线阶段生成参考描述符的层次结构，用于设计和构建模型估计器。为识别图像特征（如边缘和连接点）提供了具体示例。

4. 发明公开

EP1425605A2 SYSTEM AND METHOD TO ESTIMATE THE LOCATION OF A RECEIVER IN A MULTI-PATH ENVIRONMENT 审中-公开
标题翻译：系统和方法确定接收器的位置在多环境
公开(公告)号：EP1425605A2
公开(公告)日：2004-06-09
申请号：EP02783974.5
申请日：2002-09-07
申请人： Enuvis, Inc.
发明人： STONE, Jesse , CASADEI, Stefano , MANN, Wallace , VAN ROY, Benjamin
IPC分类号： G01S5/14
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.

5. 发明公开

EP1402280A2 METHOD FOR EXTRACTING FINE-TUNED ESTIMATES FROM CORRELATION FUNCTIONS 审中-公开
标题翻译：提取方法关联函数的微调，估计
公开(公告)号：EP1402280A2
公开(公告)日：2004-03-31
申请号：EP02747956.7
申请日：2002-06-21
申请人： Enuvis, Inc.
发明人： SAHAI, Anant , TSITSIKLIS, John , CASADEI, Stefano , CHOU, Andrew , VAN ROY, Benjamin , STONE, Jesse, R
IPC分类号： G01S5/00
CPC分类号： G01S19/09 , G01S19/29 , G01S19/30
摘要： Techniques are provided for fine-tuning estimates of a delay value for a sampled signal. One aspect of the invention is to perform, for the sampled signal, coarse-grained calculations of the In Phase and Quadrature (I and Q) correlation integrals at a limited number of points, wherein the calculations are performed over a range of hypothesized delay values. A range of delay values of interest are then determined from the coarse-grained calculations of the I and Q correlation integrals. A subset of I and Q values based on the coarse granularity calculations of the I and Q correlation functions is used to perform a time-domain interpolation to obtain fine-grained values of the I and Q integrals in the range of the delay values of interest. Magnitude calculations are performed based on the fine-grained values of the I and Q integrals. Fine-tuned estimates of delay value are based on the magnitude calculations. Alternatively, fine-tuned estimates of delay value are based on the template-matching approach.

6. 发明公开

EP1399758A2 DETERMINING THE SPATIO-TEMPORAL AND KINEMATIC PARAMETERS OF A SIGNAL RECEIVER AND ITS CLOCK BY COMBINATION OF DIFFERENT INFORMATION 审中-公开
标题翻译：测定空间，时间和信号接收器的运动学参数和他的时间按组合各种信息的
公开(公告)号：EP1399758A2
公开(公告)日：2004-03-24
申请号：EP02744558.4
申请日：2002-06-21
申请人： Enuvis, Inc.
发明人： SAHAI, Anant , CHOU, Andrew , MANN, Wallace , CASADEI, Stefano
IPC分类号： G01S5/14
CPC分类号： G01S19/24 , G01S19/23
摘要： Techniques are provided for determining clock doppler of a signal receiver. One aspect of the invention is to divide sampled data received from a receiver into data segments of incremental length. The clock doppler is estimated based on each data segment with respect to all the satellites from a set of satellites that is overhead the receiver. For each data segment , the results with respect to each satellite is used to refine the calculations of the clock doppler with respect to the next satellite. When the clock doppler calculations have been performed using all the satellites from the set of satellites for a particular data segment , then the results with respect to the particular data segment is used to refine the calculations of the clock doppler with respect to the next data segment .

7. 发明申请

WO2003023440A2 SYSTEM AND METHOD TO ESTIMATE THE LOCATION OF A RECEIVER IN A MULTI-PATH ENVIRONMENT 审中-公开
标题翻译：用于在多路径环境中估计接收器位置的系统和方法
公开(公告)号：WO2003023440A2
公开(公告)日：2003-03-20
申请号：PCT/US2002/028717
申请日：2002-09-07
申请人： ENUVIS, INC.
发明人： STONE, Jesse , CASADEI, Stefano , MANN, Wallace , VAN ROY, Benjamin
IPC分类号： G01S
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：提供了确定多路径环境中的接收器的位置的系统和方法。接收到的信号与与发射源相关的参考信号相关。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区间。在一些实施例中，这些约束是针对码相位和多普勒频率的。这些信号约束被转换成接收机变量的约束，然后融合在一起成为统一的接收机约束。先验约束，例如对接收机位置或时间戳的约束，可以并入统一的接收机约束中。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路径效应模型，并且旨在减轻这些影响。在这些模型之一中，通过用描述由多径引入的额外延迟的指数分布对高斯分布进行卷积来获得码相的概率密度。另一种方法是基于识别代码阶段中的异常值。在其他方法中，不确定性区域约束和概率密度相结合。本发明在多路径环境中实现更快和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。

8. 发明申请

WO2003023440A3 SYSTEM AND METHOD TO ESTIMATE THE LOCATION OF A RECEIVER IN A MULTI-PATH ENVIRONMENT 审中-公开
公开(公告)号：WO2003023440A3
公开(公告)日：2003-03-20
申请号：PCT/US2002/028717
申请日：2002-09-07
申请人： ENUVIS, INC.
发明人： STONE, Jesse , CASADEI, Stefano , MANN, Wallace , VAN ROY, Benjamin
IPC分类号： G01S5/14
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.

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