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1. 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。

2. 发明申请

WO03001230B1 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：WO03001230B1
公开(公告)日：2004-04-15
申请号：PCT/US0219894
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： G01S1/00 , G01S5/00 , G01S5/14
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比特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同相和正交相关积分时，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比特信息，可以通过将信号分解成数据块并且逐块地执行计算来执行相干相关。相干相关是计算与接收信号相关的采样数据的同相和正交相关积分。

3. 发明申请

WO03001229A3 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：通过组合不同信息确定信号接收机的时空和动态参数及其时钟。
公开(公告)号：WO03001229A3
公开(公告)日：2003-10-16
申请号：PCT/US0219893
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： G01S1/00 , 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 .
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。

4. 发明申请

WO0246786A3 LOCATION-DETERMINATION METHOD AND APPARATUS 审中-公开
标题翻译：位置确定方法和设备
公开(公告)号：WO0246786A3
公开(公告)日：2002-10-31
申请号：PCT/US0145828
申请日：2001-12-03
申请人： ENUVIS INC , CHOU ANDREW , VAN ROY BENJAMIN , TSITSIKLIS JOHN
发明人： CHOU ANDREW , VAN ROY BENJAMIN , TSITSIKLIS JOHN
IPC分类号： G01S1/00 , G01S5/00 , G01S5/02 , G01S5/14 , G01S19/06 , G01S19/09 , G01S19/24 , G01S19/25 , G01S19/30 , G01S19/42 , G01S19/46
CPC分类号： G01S5/02 , G01S5/0036 , G01S19/06 , G01S19/09 , G01S19/24 , G01S19/252 , G01S19/30 , G01S19/42
摘要： Some embodiments of the invention provide a location-determination system that includes several transmitters and at least one receiver. Each transmitter transmits a signal that includes a unique periodically-repeating component, and the receiver receives a reference signal. Based on the received reference signal, the location-determination system identifies an estimated location of the receiver as follows. For each transmitter in a set of transmitters, the system computes a phase offset between the received reference signal and a replica of the transmitter's periodically-repeating component. The system also identifies an approximate location of the receiver and an approximate receive time for the received signal. The system then uses the identified approximate location and time, and the computed phase offsets, to compute pseudoranges for the set of transmitters. Finally, the system identifies the estimated location of the receiver by using the computed pseudoranges.
摘要翻译：本发明的一些实施例提供了一种包括多个发射机和至少一个接收机的位置确定系统。每个发射机发射包括唯一的周期性重复分量的信号，并且接收机接收参考信号。基于接收到的参考信号，位置确定系统如下识别接收器的估计位置。对于一组发射机中的每个发射机，系统计算接收到的参考信号与发射机周期性重复组件的副本之间的相位偏移。该系统还识别接收器的近似位置和接收信号的近似接收时间。系统然后使用所识别的大致位置和时间以及所计算的相位偏移量来计算该组发射机的伪距。最后，系统通过使用计算出的伪距识别接收器的估计位置。

5. 发明申请

WO03001232A8 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：WO03001232A8
公开(公告)日：2005-06-30
申请号：PCT/US0203899
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： G01S19/01 , G01S1/00 , G01S5/14 , G01S11/10 , G01S19/09 , G01S19/13 , G01S19/42 , G01S19/46 , G01S
CPC分类号： G01S19/09 , G01S19/42 , G01S2205/008

6. 发明专利

AU2002318398A1 Extracting fine-tuned estimates from correlation functions evaluated at a limited number of values 未知
公开(公告)号：AU2002318398A1
公开(公告)日：2003-01-08
申请号：AU2002318398
申请日：2002-06-21
申请人： ENUVIS INC
发明人： CASADEI STEFANO , SAHAI ANANT , ROY BENJAMIN VAN , STONE JESSE R , TSITSIKLIS JOHN , CHOU ANDREW
IPC分类号： G01S1/00 , G01S5/00 , 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.

7. 发明专利

AU2002349799A1 Determining location information from sampled positioning signals 未知
公开(公告)号：AU2002349799A1
公开(公告)日：2003-01-08
申请号：AU2002349799
申请日：2002-06-21
申请人： ENUVIS INC
发明人： MANN WALLACE , FONG WUNGKUM , TSITSIKLIS JOHN , CHOU ANDREW , ROY BENJAMIN VAN , SAHAI ANANT , STONE JESSE R
IPC分类号： G01S1/00 , G01S1/04
摘要： To determine the location of a signal receiver, sampled data received from a receiver is divided into data segments of increasing length. Current ranges for a delay value and for a modulation frequency value are calculated relative to each satellite signal source that is overhead the signal receiver. Using the data segments of increasing length, the current ranges, estimates for the delay value and for the modulation frequency value are then iteratively calculated and updated. For each signal source, I and Q correlation integrals and their magnitude values are calculated using the modulation frequency value estimate and each of a range of delay values centered around the delay value estimate. The resulting magnitude-curve is interpolated using the calculated magnitude values. 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.

8. 发明专利

AU2002345812A1 Signal acquisition using data bit information 未知
公开(公告)号：AU2002345812A1
公开(公告)日：2003-01-08
申请号：AU2002345812
申请日：2002-06-21
申请人： ENUVIS INC
发明人： MANN WALLACE , CHOU ANDREW , SAHAI ANANT , ROY BENJAMIN VAN
IPC分类号： G01S1/00 , G01S5/00 , 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.

9. 发明专利

AU2002345811A1 Determining the spatio-temporal and kinematic parameters of a signal receiver and its clock by combination of different information. 未知
公开(公告)号：AU2002345811A1
公开(公告)日：2003-01-08
申请号：AU2002345811
申请日：2002-06-21
申请人： ENUVIS INC
发明人： CASADEI STEFANO , SAHAI ANANT , CHOU ANDREW , MANN WALLACE
IPC分类号： G01S1/00 , G01S5/14
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.

10. 发明专利

AU2002347766A1 System and method to estimate the location of a receiver 未知
公开(公告)号：AU2002347766A1
公开(公告)日：2003-03-24
申请号：AU2002347766
申请日：2002-09-07
申请人： ENUVIS INC
发明人： CHOU ANDREW , SAHAI ANANT
IPC分类号： G01S1/00 , G01S19/37 , G01S1/04
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 test 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.

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