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公开(公告)号：US07271766B2
公开(公告)日：2007-09-18
申请号：US10909184
申请日：2004-07-30
摘要： In a local positioning system, augmentation of the land-based system is provided by receiving signals from a GNSS. The signals from the land-based positioning system have a code phase accuracy better than one wavelength of a carrier of the signals from the GNSS. Different decorrelation may be used for signals from a satellite than from a land-based transmitter, such as using a digital decorrelator for signals from the satellite and an analog decorrelator for signals from a land-based transmitter. The receivers may include both a GNSS antenna and a local antenna. The phase centers of the two antennas are within one wavelength of the GNSS signals from each other. The local antenna is sized for operation in the X or ISM-bands of frequencies. The GNSS antenna is a patch antenna where the microwave antenna extends away from the patch antenna in at least one dimension.
摘要翻译： 在本地定位系统中，通过从GNSS接收信号来提供陆基系统的增强。 来自陆上定位系统的信号的编码相位精度优于来自GNSS的信号的载波的一个波长。 不同的去相关可以用于来自卫星的信号，而不是来自基于陆地的发射机，例如对于来自卫星的信号使用数字解相关器和用于来自陆地发射机的信号的模拟去相关器。 接收机可以包括GNSS天线和本地天线。 两个天线的相位中心在GNSS信号的一个波长内。 本地天线的大小适合在X或ISM频段中运行。 GNSS天线是贴片天线，其中微波天线在至少一个维度上远离贴片天线延伸。
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公开(公告)号：US07385554B2
公开(公告)日：2008-06-10
申请号：US11515547
申请日：2006-09-05
摘要： In a local positioning system, augmentation of the land-based system is provided by receiving signals from a GNSS. The signals from the land-based positioning system have a code phase accuracy better than one wavelength of a carrier of the signals from the GNSS. Different decorrelation may be used for signals from a satellite than from a land-based transmitter, such as using a digital decorrelator for signals from the satellite and an analog decorrelator for signals from a land-based transmitter. The receivers may include both a GNSS antenna and a local antenna. The phase centers of the two antennas are within one wavelength of the GNSS signals from each other. The local antenna is sized for operation in the X or ISM-bands of frequencies. The GNSS antenna is a patch antenna where the microwave antenna extends away from the patch antenna in at least one dimension.
摘要翻译： 在本地定位系统中，通过从GNSS接收信号来提供陆基系统的增强。 来自陆上定位系统的信号的编码相位精度优于来自GNSS的信号的载波的一个波长。 不同的去相关可以用于来自卫星的信号，而不是来自基于陆地的发射机，例如对于来自卫星的信号使用数字解相关器和用于来自陆基发射机的信号的模拟去相关器。 接收机可以包括GNSS天线和本地天线。 两个天线的相位中心在GNSS信号的一个波长内。 本地天线的大小适合在X或ISM频段中运行。 GNSS天线是贴片天线，其中微波天线在至少一个维度上远离贴片天线延伸。
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公开(公告)号：US06880643B1
公开(公告)日：2005-04-19
申请号：US10359409
申请日：2003-02-06
申请人： Kurt R. Zimmerman , Avi Gross , Michael O'Connor , Glen Sapilewski , David G. Lawrence , H. Stewart Cobb , Lars Leckie , Paul Y. Montgomery
发明人： Kurt R. Zimmerman , Avi Gross , Michael O'Connor , Glen Sapilewski , David G. Lawrence , H. Stewart Cobb , Lars Leckie , Paul Y. Montgomery
CPC分类号： E02F3/84
摘要： A land-leveling system that uses the Global Positioning System is provided. The system provides for an earth-moving machine mounted with an antenna that receives GPS signals from the satellites of the Global Positioning System. The earth-moving machine comprises a vehicle attached to a work implement, which is also connected to an actuator. A decision unit mounted on the vehicle sends control signals to the actuator, which controls the elevation of the work implement. These control signals are generated using the signals received from the antenna and the desired grade map. This system has an increased coverage area, more accuracy and round-the-clock operability. The system could be used to carry out all the land-leveling operations viz. surveying, leveling and verifying.
摘要翻译： 提供了使用全球定位系统的地面平整系统。 该系统提供一种安装有天线的移动机器，该天线从全球定位系统的卫星接收GPS信号。 移土机包括附接到工作工具的车辆，该工具还连接到致动器。 安装在车辆上的决定单元向执行器发送控制信号，该控制信号控制作业工具的高度。 这些控制信号使用从天线接收的信号和期望的等级图来产生。 该系统具有增加的覆盖面积，更高的准确度和全天候的可操作性。 该系统可用于执行所有的土地平整操作。 测量，调平和验证。
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公开(公告)号：US06784830B1
公开(公告)日：2004-08-31
申请号：US10413354
申请日：2003-04-14
IPC分类号： G01S514
摘要： A method and a system for L1/L2 phase and magnitude determination in satellite navigation equipment is disclosed herein. The method generates separate W code estimates for the L1 signal and the L2 signal, the estimates being uncorrelated with the error in the inphase and the quadrature components of the corresponding signals. The W code is estimated using both the L1 signal as well as the L2 signal. The L1 and L2 baseband signals are obtained from the corresponding RF signals. The baseband signals are added and then filtered using a non-causal FIR LPF. This filter has the property that the output at a time instant is uncorrelated with the input at that time instant. In the preferred embodiment, a one-W-code-bit I&D filter is used instead of a FIR LPF. In an alternate embodiment, a single W code estimate is obtained for both the L1 and the L2 signal.
摘要翻译： 本文公开了一种用于卫星导航设备中的L1 / L2相位和幅度确定的方法和系统。 该方法为L1信号和L2信号生成单独的W码估计，估计与相位中的误差和相应信号的正交分量不相关。 使用L1信号以及L2信号来估计W码。 从对应的RF信号获得L1和L2基带信号。 添加基带信号，然后使用非因果FIR LPF进行滤波。 该过滤器具有这样的属性，即当时的输出与该时刻的输入不相关。 在优选实施例中，使用单W位位I＆D滤波器来代替FIR LPF。 在替代实施例中，对L1和L2信号都获得单个W码估计。
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公开(公告)号：US07339524B2
公开(公告)日：2008-03-04
申请号：US10909207
申请日：2004-07-30
申请人： Kurt R. Zimmerman , H. Stewart Cobb
发明人： Kurt R. Zimmerman , H. Stewart Cobb
IPC分类号： G01S3/02
摘要： In a local positioning system, a receiver is adapted for receiving signals from a land-based transmitter. The receiver includes an analog decorrelator for decorrelating the transmitted spread spectrum signals. A down converter connected with an antenna may be spaced away from other portions of the receiver. The down converter down converts received ranging signals and provides them to the remotely spaced receiver portions. A signal line connecting the down converter to the receiver may be operable to transmit any two or more of a reference signal provided to the down converter, the down converted intermediate frequency signals provided to the receiver, and power provided to the down converter. The receiver may be positioned adjacent to or as part of a land-based transmitter. By determining positions of two or more antennas, the location of the associated transmitter is determined.
摘要翻译： 在本地定位系统中，接收机适于接收来自陆基发射机的信号。 该接收机包括一个模拟解相关器，用于对发射的扩频信号进行去相关。 与天线连接的降压转换器可以与接收器的其它部分间隔开。 下变频器降低转换接收的测距信号并将其提供给远程间隔的接收机部分。 将下变频器连接到接收器的信号线可以用于发送提供给下变频器的参考信号，提供给接收机的下变频中频信号以及提供给下变频器的功率中的任何两个或多个。 接收器可以定位成与陆基发射器相邻或作为陆基发射器的一部分。 通过确定两个或更多个天线的位置，确定相关联的发射机的位置。
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公开(公告)号：US07345627B2
公开(公告)日：2008-03-18
申请号：US11506587
申请日：2006-08-18
申请人： Kurt R. Zimmerman , H. Stewart Cobb
发明人： Kurt R. Zimmerman , H. Stewart Cobb
IPC分类号： G01S3/02
CPC分类号： G01S19/11 , G01S5/0009 , G01S19/36 , G01S19/37 , G01S19/41 , G01S19/44 , H01Q5/378 , H01Q5/40 , H01Q9/0414 , H01Q9/0464 , H01Q11/08
摘要： To provide sub-meter accuracy in a local positioning system, ranging signals with a high modulation rate of code, such as 30 MHz, or more are transmitted. Code phase measurements may be used to obtain the accuracy without requiring relative motion or real time kinematic processing. The ISM or X-band is used for the carrier of the code to provide sufficient bandwidth within available spectrums. The length of codes used is less than or about a longest length across the region of operation, such as less than 15 kilometers in an open pit mine. The spread spectrum codes from different land-based transmitters are transmitted in time slots pursuant to a time division multiple access scheme for an increase in dynamic range. To avoid overlapping of code from different transmitters, each time slot includes or is separated by a blanking period. The blanking period is selected to allow the transmitted signal to traverse a region of operation. Differential measurements of signals received at a base station and a mobile receiver may improve accuracy.
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公开(公告)号：US07382318B2
公开(公告)日：2008-06-03
申请号：US11506625
申请日：2006-08-18
申请人： Kurt R. Zimmerman , H. Stewart Cobb
发明人： Kurt R. Zimmerman , H. Stewart Cobb
IPC分类号： G01S3/02
CPC分类号： G01S19/11 , G01S5/0009 , G01S19/36 , G01S19/37 , G01S19/41 , G01S19/44 , H01Q5/378 , H01Q5/40 , H01Q9/0414 , H01Q9/0464 , H01Q11/08
摘要： To provide sub-meter accuracy in a local positioning system, ranging signals with a high modulation rate of code, such as 30 MHz, or more are transmitted. Code phase measurements may be used to obtain the accuracy without requiring relative motion or real time kinematic processing. The ISM or X-band is used for the carrier of the code to provide sufficient bandwidth within available spectrums. The length of codes used is less than or about a longest length across the region of operation, such as less than 15 kilometers in an open pit mine. The spread spectrum codes from different land-based transmitters are transmitted in time slots pursuant to a time division multiple access scheme for an increase in dynamic range. To avoid overlapping of code from different transmitters, each time slot includes or is separated by a blanking period. The blanking period is selected to allow the transmitted signal to traverse a region of operation. Differential measurements of signals received at a base station and a mobile receiver may improve accuracy.
摘要翻译： 为了在本地定位系统中提供子计精度，发送具有诸如30MHz或更高的高调制码率的测距信号。 可以使用代码相位测量来获得精度，而不需要相对运动或实时运动学处理。 ISM或X波段用于代码的载体，以在可用频谱内提供足够的带宽。 使用的码的长度小于或大约在整个操作区域的最长长度，例如露天矿中不超过15公里。 根据时分多址方案，来自不同基于陆地的发射机的扩频码在时隙中传输以增加动态范围。 为了避免来自不同发射机的代码重叠，每个时隙包括或被消隐期分隔。 选择消隐周期以允许发送的信号穿过操作区域。 在基站和移动接收机处接收的信号的差分测量可以提高精度。
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公开(公告)号：US07339525B2
公开(公告)日：2008-03-04
申请号：US10909020
申请日：2004-07-30
申请人： Kurt R. Zimmerman , H. Stewart Cobb
发明人： Kurt R. Zimmerman , H. Stewart Cobb
IPC分类号： G01S3/02
CPC分类号： G01S19/11 , G01S5/0009 , G01S19/36 , G01S19/37 , G01S19/41 , G01S19/44 , H01Q5/378 , H01Q5/40 , H01Q9/0414 , H01Q9/0464 , H01Q11/08
摘要： To provide sub-meter accuracy in a local positioning system, ranging signals with a high modulation rate of code, such as 30 MHz, or more are transmitted. Code phase measurements may be used to obtain the accuracy without requiring relative motion or real time kinematic processing. The ISM or X-band is used for the carrier of the code to provide sufficient bandwidth within available spectrums. The length of codes used is less than or about a longest length across the region of operation, such as less than 15 kilometers in an open pit mine. The spread spectrum codes from different land-based transmitters are transmitted in time slots pursuant to a time division multiple access scheme for an increase in dynamic range. To avoid overlapping of code from different transmitters, each time slot includes or is separated by a blanking period. The blanking period is selected to allow the transmitted signal to traverse a region of operation. Differential measurements of signals received at a base station and a mobile receiver may improve accuracy.
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9.发明授权Multiple frequency antenna structures and methods for receiving navigation or ranging signals 有权用于接收导航或测距信号的多频天线结构和方法公开(公告)号：US07315278B1
公开(公告)日：2008-01-01
申请号：US10909140
申请日：2004-07-30
摘要： In a local positioning system, augmentation of the land-based system is provided by receiving signals from a GNSS. The signals from the land-based positioning system have a code phase accuracy better than one wavelength of a carrier of the signals from the GNSS. Different decorrelation may be used for signals from a satellite than from a land-based transmitter, such as using a digital decorrelator for signals from the satellite and an analog decorrelator for signals from a land-based transmitter. The receivers may include both a GNSS antenna and a local antenna. The phase centers of the two antennas are within one wavelength of the GNSS signals from each other. The local antenna is sized for operation in the X or ISM-bands of frequencies. The GNSS antenna is a patch antenna where the microwave antenna extends away from the patch antenna in at least one dimension.
摘要翻译： 在本地定位系统中，通过从GNSS接收信号来提供陆基系统的增强。 来自陆上定位系统的信号的编码相位精度优于来自GNSS的信号的载波的一个波长。 不同的去相关可以用于来自卫星的信号，而不是来自基于陆地的发射机，例如对于来自卫星的信号使用数字解相关器和用于来自陆地发射机的信号的模拟去相关器。 接收机可以包括GNSS天线和本地天线。 两个天线的相位中心在GNSS信号的一个波长内。 本地天线的大小适合在X或ISM频段中运行。 GNSS天线是贴片天线，其中微波天线在至少一个维度上远离贴片天线延伸。
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公开(公告)号：US07027918B2
公开(公告)日：2006-04-11
申请号：US10408496
申请日：2003-04-07
CPC分类号： G01S19/54 , G01C21/165 , G01S19/50
摘要： A satellite navigation system using multiple antennas for providing the position of multiple fiduciary points on an object even when fewer than four satellites are visible to some or all the antennas. Satellite signals from the multiple antennas are fed into at least one receiver. The receiver or receivers utilize constraint information, which is independent of the satellite signals. These external constraints are used to augment the signals received from the satellites, to obtain the position solution for each antenna. In a preferred embodiment, a common reference clock is used to provide an external constraint. Examples of other external constraints that can be used in the current invention are distance between the antennas, inertial measurement of attitude, rotational or linear position sensors, etc.
摘要翻译： 一种使用多个天线的卫星导航系统，用于在物体上提供多个受信点的位置，即使对于一些或所有天线可见少于四颗卫星。 来自多个天线的卫星信号被馈送到至少一个接收机。 接收机或接收机利用独立于卫星信号的约束信息。 这些外部约束用于增加从卫星接收的信号，以获得每个天线的位置解。 在优选实施例中，使用公共参考时钟来提供外部约束。 可以在本发明中使用的其他外部约束的示例是天线之间的距离，姿态的惯性测量，旋转或线性位置传感器等。
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