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1. 发明申请

WO2003001235A3 DETERMINING LOCATION INFORMATION FROM SAMPLED POSITIONING SIGNALS 审中-公开
公开(公告)号：WO2003001235A3
公开(公告)日：2003-01-03
申请号：PCT/US2002/021178
申请日：2002-06-21
申请人： ENUVIS, INC. , SAHAI, Anant , TSITSIKLIS, John , VAN ROY, Benjamin , CHOU, Andrew , MANN, Wallace , STONE, Jesse, R. , FONG, WungKum
发明人： SAHAI, Anant , TSITSIKLIS, John , VAN ROY, Benjamin , CHOU, Andrew , MANN, Wallace , STONE, Jesse, R. , FONG, WungKum
IPC分类号： G01S1/04
摘要： According to one aspect of the invention, sampled data that is received from a receiver is divided into segments of data of increasing length. A current value range for a delay value and a current value range for a modulation frequency value are calculated relative to each signal source from a set of signal sources that are overhead the signal receiver. An estimate for the delay value and an estimate for the modulation frequency value are calculated by iteratively updating the current value range for the delay value and for the modulation frequency value. The iterative update of the current value range for the delay value and for the modulation frequency value is performed overthe set of signal sources and over the segments of data of increasing length. According to another aspect of the technique, for each signal source, I and Q correlation integrals and their magnitude value are calculated corresponding to the estimate of the modulation frequency value and the estimate of the delay value. In addition, for each signal source, I and Q correlation integrals and thier magnitude values are calculated corresponding to a set of delay values that surround the estimate of the delay value. A shape of a magnitude-curve is interpolated using the magnitude values corresponding to the estimate of the delay value and corresponding to the set of delay values that surround the estimate of the delay value. The location of the receiver is calculated using the shape of the magnitude-curve to represent the I and Q correlation integrals for each signal source.

2. 发明申请

WO03001234A2 EXTRACTING FINE-TUNED ESTIMATES FROM CORRELATION FUNCTIONS EVALUATED AT A LIMITED NUMBER OF VALUES 审中-公开
标题翻译：从有关数值评估的相关函数中提取微调估计
公开(公告)号：WO03001234A2
公开(公告)日：2003-01-03
申请号：PCT/US0219964
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： G01S1/00 , 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.
摘要翻译：提供了用于微调采样信号的延迟值的估计的技术。本发明的一个方面是对采样的信号执行在有限数量的点处的In相位和正交（I和Q）相关积分的粗粒度计算，其中计算是在一系列假定的延迟值。然后从I和Q相关积分的粗粒度计算确定感兴趣的延迟值范围。使用基于I和Q相关函数的粗粒度计算的I和Q值的子集来执行时域插值，以在感兴趣的延迟值的范围内获得I和Q积分的细粒度值。基于I和Q积分的细粒度值进行幅度计算。延迟值的微调估计基于幅度计算。或者，延迟值的微调估计基于模板匹配方法。

3. 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.

4. 发明申请

WO2003001235A2 DETERMINING LOCATION INFORMATION USING SAMPLED DATA CONTAINING LOCATION-DETERMINING SIGNALS AND NOISE 审中-公开
标题翻译：使用包含位置确定信号和噪声的采样数据确定位置信息
公开(公告)号：WO2003001235A2
公开(公告)日：2003-01-03
申请号：PCT/US2002/021178
申请日：2002-06-21
申请人： ENUVIS, INC. , SAHAI, Anant , TSITSIKLIS, John , VAN ROY, Benjamin , CHOU, Andrew , MANN, Wallace , STONE, Jesse, R. , FONG, WungKum
发明人： SAHAI, Anant , TSITSIKLIS, John , VAN ROY, Benjamin , CHOU, Andrew , MANN, Wallace , STONE, Jesse, R. , FONG, WungKum
IPC分类号： G01S5/00
CPC分类号： G01S19/30
摘要： Techniques are provided for determining the location of a signal receiver. According to one aspect of the invention, sampled data that is received from a receiver is divided into segments of data of increasing length. A current value range for a delay value and a current value range for a modulation frequency value are calculated relative to each signal source from a set of signal sources that are overhead the signal receiver. An estimate for the delay value and an estimate for the modulation frequency value are calculated by iteratively updating the current value range for the delay value and for the modulation frequency value. The iterative update of the current value range for the delay value and for the modulation frequency value is performed overthe set of signal sources and over the segments of data of increasing length. According to another aspect of the technique, for each signal source, I and Q correlation integrals and their magnitude value are calculated corresponding to the estimate of the modulation frequency value and the estimate of the delay value. In addition, for each signal source, I and Q correlation integrals and thier magnitude values are calculated corresponding to a set of delay values that surround the estimate of the delay value. A shape of a magnitude-curve is interpolated using the magnitude values corresponding to the estimate of the delay value and corresponding to the set of delay values that surround the estimate of the delay value. The location of the receiver is calculated using the shape of the magnitude-curve to represent the I and Q correlation integrals for each signal source.
摘要翻译：提供了用于确定信号接收机的位置的技术。根据本发明的一个方面，从接收机接收的采样数据被分成长度增加的数据段。从信号接收器开销的一组信号源中相对于每个信号源计算用于调制频率值的延迟值和当前值范围的当前值范围。通过迭代地更新延迟值和调制频率值的当前值范围来计算延迟值和调制频率值的估计。对于延迟值和调制频率值的当前值范围的迭代更新在信号源集合和数据长度增加的段上进行。根据该技术的另一方面，对于每个信号源，对应于调制频率值的估计和延迟值的估计来计算I和Q相关积分及其幅值。此外，对于每个信号源，对应于围绕延迟值的估计的一组延迟值来计算I和Q相关积分和thier幅值。使用与延迟值的估计对应的幅度值对应于包围延迟值的估计的延迟值的集合来内插幅度曲线的形状。使用幅度曲线的形状来计算接收机的位置，以表示每个信号源的I和Q相关积分。

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