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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

WO2003001232A2 LOCATION-DETERMINATION METHOD AND APPARATUS 审中-公开
标题翻译：位置确定方法和装置
公开(公告)号：WO2003001232A2
公开(公告)日：2003-01-03
申请号：PCT/US2002/003899
申请日：2002-02-11
申请人： ENUVIS, INC. , VAN ROY, Benjamin , TSITSIKLIS, John , CHOU, Andrew
发明人： VAN ROY, Benjamin , TSITSIKLIS, John , CHOU, Andrew
IPC分类号： G01S
CPC分类号： G01S19/09 , G01S19/42 , G01S2205/008
摘要： Some embodiments of the invention provide a location-determination system that includes a number of transmitters and at least one receiver. Based on a reference signal received by the receiver, this location-determination system identifies an estimated location of the receiver within a region. In some embodiments, the system selects one or more locations within the region. For each particular selected location, the system calculates a metric value that quantifies the similarity between the received signal and the signal that the receiver could expect to receive at the particular location, in the absence or presence of interference. Based on the calculated metric value or values, the system identifies the estimated location of the receiver.
摘要翻译：本发明的一些实施例提供一种位置确定系统，其包括多个发射机和至少一个接收机。基于由接收器接收的参考信号，该位置确定系统识别接收机在一个区域内的估计位置。在一些实施例中，系统选择区域内的一个或多个位置。对于每个特定的所选择的位置，系统计算量度值，其在不存在或存在干扰的情况下量化接收信号与接收机可能期望在特定位置接收的信号之间的相似度。基于计算的度量值或值，系统识别接收机的估计位置。

3. 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.

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。

5. 发明申请

WO2003001230A3 SIGNAL ACQUISITION USING DATA BIT INFORMATION 审中-公开
公开(公告)号：WO2003001230A3
公开(公告)日：2003-01-03
申请号：PCT/US2002/019894
申请日：2002-06-21
申请人： ENUVIS, INC. , SAHAI, Anant , MANN, Wallace , CHOU, Andrew , VAN ROY, Benjamin
发明人： SAHAI, Anant , MANN, Wallace , CHOU, Andrew , VAN ROY, Benjamin
IPC分类号： G01S5/14
摘要： Techniques are provided for aiding in acquiring a signal using the data bit information that is associated with each signal source. One aspect of the invention is to use the data bit information that is associated with each signal source when calculating the In Phase and Quadrature correlation integrals by using the sampled data associated with the received signal. By using the data bit information that is associated with each signal source, coherent correlation may be performed by breaking the signal into data blocks and performing calculations on a block-by-block basis. Coherent correlation is the calculation of In Phase and Quadrature correlation integrals for sampled data that is associated with the received signal.

6. 发明申请

WO2003001230A2 SIGNAL ACQUISITION USING DATA BIT INFORMATION 审中-公开
标题翻译：使用数据位信息进行信号采集
公开(公告)号：WO2003001230A2
公开(公告)日：2003-01-03
申请号：PCT/US2002/019894
申请日：2002-06-21
申请人： ENUVIS, INC. , SAHAI, Anant , MANN, Wallace , CHOU, Andrew , VAN ROY, Benjamin
发明人： SAHAI, Anant , MANN, Wallace , CHOU, Andrew , VAN ROY, Benjamin
IPC分类号： G01S
CPC分类号： G01S19/30 , G01S19/06 , G01S19/09 , G01S19/24
摘要： Techniques are provided for aiding in acquiring a signal using the data bit information that is associated with each signal source. One aspect of the invention is to use the data bit information that is associated with each signal source when calculating the In Phase and Quadrature correlation integrals by using the sampled data associated with the received signal. By using the data bit information that is associated with each signal source, coherent correlation may be performed by breaking the signal into data blocks and performing calculations on a block-by-block basis. Coherent correlation is the calculation of In Phase and Quadrature correlation integrals for sampled data that is associated with the received signal.
摘要翻译：提供了使用与每个信号源相关联的数据位信息来帮助获取信号的技术。本发明的一个方面是通过使用与接收信号相关联的采样数据来计算In相位和正交相关积分时，使用与每个信号源相关联的数据比特信息。通过使用与每个信号源相关联的数据位信息，可以通过将信号分解成数据块并且在逐块的基础上执行计算来执行相干相关。相干相关是与接收信号相关联的采样数据的相位和正交相关积分的计算。

7. 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。

8. 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.

9. 发明公开

EP1419401A2 SYSTEM AND METHOD TO ESTIMATE THE LOCATION OF A RECEIVER 有权
标题翻译： SYSTEM AND METHOD FOR的接收机的确定位置
公开(公告)号：EP1419401A2
公开(公告)日：2004-05-19
申请号：EP02783975.2
申请日：2002-09-07
申请人： Enuvis, Inc.
发明人： SAHAI, Anant , CHOU, Andrew
IPC分类号： G01S1/04
CPC分类号： G01S19/29 , G01S19/09 , G01S19/22 , G01S19/30
摘要： System and method to determine the location of a receiver are provided. The received signal is decomposed into signal chunks that are then correlated with the reference signals of the transmitting sources. In some embodiments, the signal chunks may be shorter than the period of the reference signals. For each signal source, a grid of correlation values is constructed containing one column of correlation values for each signal chunk. Each column contains correlation values for several code-phases. Probes are executed in the grid to acquire the location-determining signals. In some embodiments, a probe includes calculating the fourier transform of a row in the grid, yielding correlation values associated with a refined set of frequency values. Potential acquisitions are verified by processing increasing portions of the received signal. Confirmed acquisition may be used to aid further acquisitions. Some embodiments eventually compress the received signal down to a one period duration by means of an ultra-stacking method. Additional verification, comprising multi-peak tests and multi-path tests, may be performed on the correlation magnitude curve obtained from the ultra- stacked signal. Finally, refined code-phase values are extracted from these correlation magnitude curves.

10. 发明公开

EP1407285A2 SIGNAL ACQUISITION USING DATA BIT INFORMATION 审中-公开
标题翻译： SIGNAL收购数据比特的信息
公开(公告)号：EP1407285A2
公开(公告)日：2004-04-14
申请号：EP02744559.2
申请日：2002-06-21
申请人： Enuvis, Inc.
发明人： SAHAI, Anant , MANN, Wallace , CHOU, Andrew , VAN ROY, Benjamin
IPC分类号： G01S1/00
CPC分类号： G01S19/30 , G01S19/06 , G01S19/09 , G01S19/24
摘要： Techniques are provided for aiding in acquiring a signal using the data bit information that is associated with each signal source. One aspect of the invention is to use the data bit information that is associated with each signal source when calculating the In Phase and Quadrature correlation integrals by using the sampled data associated with the received signal. By using the data bit information that is associated with each signal source, coherent correlation may be performed by breaking the signal into data blocks and performing calculations on a block-by-block basis. Coherent correlation is the calculation of In Phase and Quadrature correlation integrals for sampled data that is associated with the received signal.

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