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1. 发明授权

US06480788B2 System and method for fast acquisition reporting using communication satellite range measurement 有权
公开(公告)号：US06480788B2
公开(公告)日：2002-11-12
申请号：US09984069
申请日：2001-10-26
申请人： James B. Kilfeather , Mark C. Sullivan
发明人： James B. Kilfeather , Mark C. Sullivan
IPC分类号： H04B10105
CPC分类号： G01S19/09 , G01S5/0036 , G01S5/14 , G01S19/256 , G01S19/40
摘要： A geographic tracking system with minimal power and size required at the mobile terminal collects observation data at the mobile terminal, forwards the data to a processor, which calculates the position. The mobile terminal needs only to gather a few milliseconds of observation data, and to relay this observation data to the processor. The range from the satellite (or other airborne transponder) to the terminal is determined using the known positions of an interrogating transmitter and a satellite, and a known terminal delay between the received signal and the transmission of the return signal, and the round trip time. An arc of locations is determined by computing an intersection of a sphere centered at the satellite having a radius given by the calculated range with a model of the Earth's surface. The candidate points are considered and refined using code phase measurements from a set of GPS satellites. The candidate point having the lowest residuals or expected to measured code phases is chosen as the location of the mobile terminal. The measurements can be refined to account for various sources of error including measurement bias, relative motion and timing errors.

2. 发明授权

US06243648B1 Fast acquisition position reporting system 有权
标题翻译：快速采购位置报告系统
公开(公告)号：US06243648B1
公开(公告)日：2001-06-05
申请号：US09351852
申请日：1999-07-12
申请人： James B. Kilfeather , Mark C. Sullivan
发明人： James B. Kilfeather , Mark C. Sullivan
IPC分类号： G01S502
CPC分类号： G01S19/09 , G01S5/0036 , G01S5/14 , G01S19/256 , G01S19/40
摘要： A geographic tracking system with minimal power and size required at the mobile terminal collects observation data at the mobile terminal, forwards the data to a processor, which calculates the position. The mobile terminal needs only to gather a few milliseconds of observation data, and to relay this observation data to the processor. The range from the satellite (or other airborne transponder) to the terminal is determined using the known positions of an interrogating transmitter and a satellite, and a known terminal delay between the received signal and the transmission of the return signal, and the round trip time. An arc of locations is determined by computing an intersection of a sphere centered at the satellite having a radius given by the calculated range with a model of the Earth's surface. Only that portion of the arc within the region bounded by the satellite beam pattern is retained. Next, the time when the mobile terminal collected the GPS signal is determined. A satellite orbit model estimates the positions of the GPS satellites at their time of transmission. Using discrete points on the arc as an initial guess, an iterative least squares technique fits the observation data to the predicted data and minimizes residual error. After convergence, this estimated position solution is then screened against the known satellite range, satellite beam boundaries, an acceptable altitude range, and a maximum residual threshold. Those position estimates not meeting these criteria are discarded. The remaining points are then subjected to a final improved position estimate and residual calculation and the best point is selected.
摘要翻译：移动终端所需的功率和尺寸最小的地理跟踪系统在移动终端收集观测数据，将数据转发到计算位置的处理器。移动终端仅需要收集几毫秒的观测数据，并将该观测数据中继到处理器。使用询问发射机和卫星的已知位置以及接收信号与返回信号的发送之间的已知终端延迟以及往返时间来确定从卫星（或其他机载应答器）到终端的范围。通过计算以具有由计算范围给出的半径的卫星为中心的球体与地球表面的模型的交点来确定位置弧。仅保留由卫星光束图案限定的区域内的弧的那部分。接下来，确定移动终端收集GPS信号的时间。卫星轨道模型估计GPS卫星在发射时的位置。使用电弧上的离散点作为初始猜测，迭代最小二乘法将观测数据与预测数据拟合，并使残余误差最小化。在收敛之后，然后根据已知的卫星范围，卫星波束边界，可接受的高度范围和最大剩余阈值来筛选该估计位置解。那些不符合这些条件的位置估计被丢弃。然后对剩余的点进行最终改进的位置估计和残差计算，并选择最佳点。

3. 发明授权

US06560536B1 System and method for rapid telepositioning 有权
标题翻译：快速远程定位的系统和方法
公开(公告)号：US06560536B1
公开(公告)日：2003-05-06
申请号：US09829993
申请日：2001-04-11
申请人： Mark C. Sullivan , James B. Kilfeather
发明人： Mark C. Sullivan , James B. Kilfeather
IPC分类号： H04B7185
CPC分类号： H04W64/00 , G01S5/0036 , G01S5/06 , G01S5/14 , G01S19/09 , G01S19/256 , G01S19/40 , Y02D70/164
摘要： A geographic tracking system with minimal power and size required at the mobile terminal collects observation data at the mobile terminal, forwards the data to a processor, which calculates the position. The mobile terminal needs only to gather a few milliseconds of observation data, and to relay this observation data to the processor. The range from the satellite (or other airborne transponder) to the terminal is determined using the known positions of an interrogating transmitter and a satellite, and a known terminal delay between the received signal and the transmission of the return signal, and the round trip time. An arc of locations is determined by computing an intersection of a sphere centered at the satellite having a radius given by the calculated range with a model of the Earth's surface. Alternatively, candidate locations that are consistent with the carrier signal received from GPS satellites can be used. In either case, the candidate points are considered and refined using code phase measurements from a set of GPS satellites. The candidate point having the lowest residuals or expected to measured code phases is chosen as the location of the mobile terminal. The measurements can be refined to account for various sources of error including measurement bias, relative motion and timing errors.
摘要翻译：移动终端所需的功率和尺寸最小的地理跟踪系统在移动终端收集观测数据，将数据转发到计算位置的处理器。移动终端仅需要收集几毫秒的观测数据，并将该观测数据中继到处理器。使用询问发射机和卫星的已知位置以及接收信号与返回信号的发送之间的已知终端延迟以及往返时间来确定从卫星（或其他机载应答器）到终端的范围。通过计算以具有由计算范围给出的半径的卫星为中心的球体与地球表面的模型的交点来确定位置弧。或者，可以使用与从GPS卫星接收的载波信号一致的候选位置。在任一情况下，使用来自一组GPS卫星的码相位测量来考虑和改进候选点。选择具有最低残差或预期测量码相位的候选点作为移动终端的位置。可以对测量结果进行细化以解决各种误差源，包括测量偏差，相对运动和定时误差。

4. 发明授权

US08630796B2 System and method for fast acquisition position reporting 有权
标题翻译：快速采集位置报告的系统和方法
公开(公告)号：US08630796B2
公开(公告)日：2014-01-14
申请号：US11030983
申请日：2005-01-10
申请人： Mark C. Sullivan , James B. Kilfeather
发明人： Mark C. Sullivan , James B. Kilfeather
IPC分类号： G06F17/00 , H04Q7/20
CPC分类号： G01S19/09 , G01S5/0036 , G01S5/14 , G01S19/256 , G01S19/40
摘要： A geographic tracking system with minimal power and size required at the mobile terminal collects observation data at the mobile terminal, forwards the data to a processor, which calculates the position. The mobile terminal needs only to gather a few milliseconds of observation data, and to relay this observation data to the processor. The range from the satellite (or other airborne transponder) to the terminal is determined using the known positions of an interrogating transmitter and a satellite, and a known terminal delay between the received signal and the transmission of the return signal, and the round trip time. An arc of locations is determined by computing an intersection of a sphere centered at the satellite having a radius given by the calculated range with a model of the Earth's surface. The candidate points are considered and refined using code phase measurements from a set of GPS satellites. The candidate point having the lowest residuals or expected to measured code phases is chosen as the location of the mobile terminal. The measurements can be refined to account for various sources of error including measurement bias, relative motion and timing errors.
摘要翻译：移动终端所需的功率和尺寸最小的地理跟踪系统在移动终端收集观测数据，将数据转发到计算位置的处理器。移动终端仅需要收集几毫秒的观测数据，并将该观测数据中继到处理器。使用询问发射机和卫星的已知位置以及接收信号与返回信号的发送之间的已知终端延迟以及往返时间来确定从卫星（或其他机载应答器）到终端的范围。通过计算以具有由计算范围给出的半径的卫星为中心的球体与地球表面的模型的交点来确定位置弧。使用一组GPS卫星的码相位测量来考虑和改进候选点。选择具有最低残差或预期测量码相位的候选点作为移动终端的位置。可以对测量结果进行细化以解决各种误差源，包括测量偏差，相对运动和定时误差。

5. 发明授权

US06725158B1 System and method for fast acquisition reporting using communication satellite range measurement 有权
公开(公告)号：US06725158B1
公开(公告)日：2004-04-20
申请号：US10191288
申请日：2002-07-10
申请人： Mark C. Sullivan , James B. Kilfeather
发明人： Mark C. Sullivan , James B. Kilfeather
IPC分类号： G01S502
CPC分类号： G01S19/256 , G01S5/0036 , G01S19/09 , G01S19/40 , G01S19/46
摘要： A geographic tracking system with minimal power and size required at the mobile terminal collects observation data at the mobile terminal, forwards the data to a processor, which calculates the position. The mobile terminal needs only to gather a few milliseconds of observation data, and to relay this observation data to the processor. The range from the satellite (or other airborne transponder) to the terminal is determined using the known positions of an interrogating transmitter and a satellite, and a known terminal delay between the received signal and the transmission of the return signal, and the round trip time. An arc of locations is determined by computing an intersection of a sphere centered at the satellite having a radius given by the calculated range with a model of the Earth's surface. The candidate points are considered and refined using code phase measurements from a set of GPS satellites. The candidate point having the lowest residuals or expected to measured code phases is chosen as the location of the mobile terminal. The measurements can be refined to account for various sources of error including measurement bias, relative motion and timing errors.

6. 发明授权

US06665332B1 CDMA geolocation system 失效
标题翻译： CDMA地理定位系统
公开(公告)号：US06665332B1
公开(公告)日：2003-12-16
申请号：US09392965
申请日：1999-09-09
申请人： John P. Carlson , Thomas B. Gravely , Mark C. Sullivan
发明人： John P. Carlson , Thomas B. Gravely , Mark C. Sullivan
IPC分类号： H04B1713
CPC分类号： G01S5/0221 , G01S5/06 , G01S5/14 , G01S11/02 , H04B1/70757 , H04B1/7077 , H04B2201/70715
摘要： A geolocation system for geolocating a mobile transceiver operating in a CDMA communication system is disclosed having improved time of arrival extraction which allows the extracting of time of arrival information of weak CDMA emissions. The improved time of arrival extraction is accomplished by breaking the received CDMA emission into M identical processing stages. Each stage performs despreading/demodulating at over sampled chip offsets from the next processing stage. The P-point fast Fourier transform of the M stages is taken and in effect a two dimensional time versus frequency cross ambiguity function is created. The peak of the function may be interpolated to create an accurate estimate of the time of arrival of the emission from the mobile transceiver, thus improving the accuracy of time of arrival measurements and adjusting for doppler frequency shifts that may otherwise corrupt the measurements when integrating over a long period of time.
摘要翻译：公开了一种用于对在CDMA通信系统中操作的移动收发机进行地理定位的地理定位系统，其具有改进的到达时间提取，其允许提取弱CDMA发射的到达时间信息。改进的到达提取时间是通过将接收到的CDMA发射分解成M个相同的处理阶段来完成的。每个阶段在下一个处理阶段的过采样芯片偏移处执行解扩/解调。采用M级的P点快速傅里叶变换，实际上产生了二维时间与频率交叉模糊函数。可以对功能的峰值进行内插，以创建来自移动收发器的发射的到达时间的精确估计，从而提高到达时间测量的准确性并调整多普勒频移，否则可能会在整合时破坏测量很长一段时间。

7. 发明授权

US07505508B2 System and method for fast code phase and carrier frequency acquisition in GPS receiver 有权
公开(公告)号：US07505508B2
公开(公告)日：2009-03-17
申请号：US11849333
申请日：2007-09-03
申请人： Mark C. Sullivan
发明人： Mark C. Sullivan
IPC分类号： H04B1/707
CPC分类号： G01S19/29 , G01S19/235 , G01S19/258 , G01S19/30 , H04B1/7077 , H04B2201/70715
摘要： A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code. The resulting product is converted to the time domain, and a peak is detected. The location of the peak corresponds to the code phase. If no peak is located, the carrier frequency is changed. Full- and half-bin steps in carrier frequency are considered. Processing gain is achieved by using longer segments of the input signal, for example 4 or 16 ms and integrating 1-ms segments. Considerations are provided for compensating for the effects of a transition, should it occur in the short segment of the GPS signal being processed. Integrations can be performed using non-coherent and coherent techniques. Adjustments are made for non-integral millisecond segment lengths.

8. 发明授权

US07020190B2 Frequency translator using a cordic phase rotator 有权
公开(公告)号：US07020190B2
公开(公告)日：2006-03-28
申请号：US09925011
申请日：2001-08-09
申请人： Mark C. Sullivan
发明人： Mark C. Sullivan
IPC分类号： H04B1/38
CPC分类号： H03C3/40
摘要： A frequency translator uses a CORDIC phase rotator coupled to a phase accumulator to translate an input signal in frequency. The CORDIC phase rotator performs required phase angle rotations of input vectors using only shift and add operations. Thus, the frequency translator can be readily implemented in hardware. Higher precision arithmetic is used in the CORDIC phase rotator operations than the input vectors contain. To avoid truncation error at the output of the CORDIC phase rotator, stochastic rounding is employed. A dither signal is added to avoid errors due to nonlinear operation of D/A converters, where D/A conversion of the frequency translated signal is required.

9. 发明授权

US08457177B2 System and method for fast code phase and carrier frequency acquisition in GPS receiver 有权
公开(公告)号：US08457177B2
公开(公告)日：2013-06-04
申请号：US12395243
申请日：2009-02-27
申请人： Mark C. Sullivan
发明人： Mark C. Sullivan
IPC分类号： H03D1/00 , H04B1/707
CPC分类号： G01S19/29 , G01S19/235 , G01S19/258 , G01S19/30 , H04B1/7077 , H04B2201/70715
摘要： A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code. The resulting product is converted to the time domain, and a peak is detected. The location of the peak corresponds to the code phase. If no peak is located, the carrier frequency is changed. Full- and half-bin steps in carrier frequency are considered. Processing gain is achieved by using longer segments of the input signal, for example 4 or 16 ms and integrating 1-ms segments. Considerations are provided for compensating for the effects of a transition, should it occur in the short segment of the GPS signal being processed. Integrations can be performed using non-coherent and coherent techniques. Adjustments are made for non-integral millisecond segment lengths.

10. 发明授权

US07327783B2 Frequency translator using a cordic phase rotator 有权
标题翻译：频率转换器使用的是一个三相旋转器
公开(公告)号：US07327783B2
公开(公告)日：2008-02-05
申请号：US11345671
申请日：2006-02-02
申请人： Mark C. Sullivan
发明人： Mark C. Sullivan
IPC分类号： H04B1/38
CPC分类号： H03C3/40
摘要： A frequency translator uses a CORDIC phase rotator coupled to a phase accumulator to translate an input signal in frequency. The CORDIC phase rotator performs required phase angle rotations of input vectors using only shift and add operations. Thus, the frequency translator can be readily implemented in hardware. Higher precision arithmetic is used in the CORDIC phase rotator operations than the input vectors contain. To avoid truncation error at the output of the CORDIC phase rotator, stochastic rounding is employed. A dither signal is added to avoid errors due to nonlinear operation of D/A converters, where D/A conversion of the frequency translated signal is required.
摘要翻译：频率转换器使用耦合到相位累加器的CORDIC相位旋转器来转换频率上的输入信号。 CORDIC相位旋转器仅使用移位和加法运算来执行输入向量的所需相位角旋转。因此，频率转换器可以容易地以硬件实现。在CORDIC相位旋转器操作中使用较高精度算术，而不是输入向量包含。为了避免CORDIC相位旋转器输出端的截断误差，采用随机舍入。添加抖动信号以避免由于需要频率转换信号的D / A转换的D / A转换器的非线性操作引起的误差。

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