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。

公开(公告)号：US07342538B2

公开(公告)日：2008-03-11

申请号：US10909170

申请日：2004-07-30

申请人： Kurt R. Zimmerman

发明人： Kurt R. Zimmerman

IPC分类号： G01S3/02

CPC分类号： G01S19/07 ,  G01S5/009 ,  G01S19/04 ,  G01S19/11 ,  G01S19/32 ,  G01S19/37 ,  G01S19/41 ,  G01S19/44

摘要： In a local positioning system, the land-based transmitters include free running oscillators or oscillators free of clock synchronization with any remote oscillator. A reference receiver receives the ranging signals from different transmitters and generates timing offset information, such as code phase measurements. The timing offset information is then communicated back to transmitters. The temporal offset information indicates relative timing or phasing of the different transmitted ranging signals to the reference receiver. The transmitters then transmit the temporal offset information with the ranging signals, such as modulating the transmitted code by the timing offset information. A mobile receiver is operable to receive the ranging signals and timing offset information in a same communications path, such as on a same carrier. Position is determined with the temporal offset information and the ranging signals. The temporal offset information for the various transmitters allows the mobile receiver to more accurately determine position than in an unsynchronized system.

摘要翻译： 在本地定位系统中，陆基发射机包括与任何远程振荡器无时钟同步的自由运行振荡器或振荡器。 参考接收机接收来自不同发射机的测距信号，并产生定时偏移信息，如码相位测量。 定时偏移信息然后被传送回发射机。 时间偏移信息指示与参考接收机的不同发送的测距信号的相对定时或定相。 发射机然后用测距信号发送时间偏移信息，例如通过定时偏移信息调制发送的码。 移动接收机可操作以在相同的通信路径（例如在相同的载波上）接收测距信号和定时偏移信息。 位置由时间偏移信息和测距信号确定。 各种发射机的时间偏移信息允许移动接收机比非同步系统更准确地确定位置。

公开(公告)号：US07339526B2

公开(公告)日：2008-03-04

申请号：US10909234

申请日：2004-07-30

申请人： Kurt R. Zimmerman

发明人： Kurt R. Zimmerman

IPC分类号： G01S3/02 ,  G01S1/00

CPC分类号： G01S19/44 ,  G01S5/009 ,  G01S19/04 ,  G01S19/07 ,  G01S19/11 ,  G01S19/32 ,  G01S19/37 ,  G01S19/41

摘要： In a local positioning system, the land-based transmitters include free running oscillators or oscillators free of clock synchronization with any remote oscillator. A reference receiver receives the ranging signals from different transmitters and generates timing offset information, such as code phase measurements. The timing offset information is then communicated back to transmitters. The temporal offset information indicates relative timing or phasing of the different transmitted ranging signals to the reference receiver. The transmitters then transmit the temporal offset information with the ranging signals, such as modulating the transmitted code by the timing offset information. A mobile receiver is operable to receive the ranging signals and timing offset information in a same communications path, such as on a same carrier. Position is determined with the temporal offset information and the ranging signals. The temporal offset information for the various transmitters allows the mobile receiver to more accurately determine position than in an unsynchronized system.

摘要翻译： 在本地定位系统中，陆基发射机包括与任何远程振荡器无时钟同步的自由运行振荡器或振荡器。 参考接收机接收来自不同发射机的测距信号，并产生定时偏移信息，如码相位测量。 定时偏移信息然后被传送回发射机。 时间偏移信息指示与参考接收机的不同发送的测距信号的相对定时或定相。 发射机然后用测距信号发送时间偏移信息，例如通过定时偏移信息调制发送的码。 移动接收机可操作以在相同的通信路径（例如在相同的载波上）接收测距信号和定时偏移信息。 位置由时间偏移信息和测距信号确定。 各种发射机的时间偏移信息允许移动接收机比非同步系统更准确地确定位置。

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.