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1. 发明授权

US08559413B2 System and method for detecting packet synchronization 有权
公开(公告)号：US08559413B2
公开(公告)日：2013-10-15
申请号：US12895757
申请日：2010-09-30
申请人： Gaspar Lee , Hao-Jen Cheng
发明人： Gaspar Lee , Hao-Jen Cheng
IPC分类号： H04J3/06 , G01S19/23
CPC分类号： H04B7/2125 , G01S19/243 , G01S19/27 , G01S19/33
摘要： A method of providing frame synchronization for GPS signals can include performing coherent bit extraction on the GPS bits and then performing coherent frame boundary detection based on the bits of the coherent bit extraction. Concurrently, differential bit extraction on the GPS bits and differential frame boundary detection based on bits of the differential bit extraction can be performed. Whichever of the coherent frame boundary detection and the differential frame boundary detection first finds a frame boundary, then that frame boundary is used for the frame synchronization. A method of providing string synchronization for GLONASS signals includes performing coherent and differential bit extraction on the GLONASS bits.

2. 发明申请

US20120082187A1 System And Method For Detecting Packet Synchronization 有权
标题翻译：用于检测数据包同步的系统和方法
公开(公告)号：US20120082187A1
公开(公告)日：2012-04-05
申请号：US12895757
申请日：2010-09-30
申请人： Gaspar Lee , Hao-Jen Cheng
发明人： Gaspar Lee , Hao-Jen Cheng
IPC分类号： H04B1/707
CPC分类号： H04B7/2125 , G01S19/243 , G01S19/27 , G01S19/33
摘要： A method of providing frame synchronization for GPS signals can include performing coherent bit extraction on the GPS bits and then performing coherent frame boundary detection based on the bits of the coherent bit extraction. Concurrently, differential bit extraction on the GPS bits and differential frame boundary detection based on bits of the differential bit extraction can be performed. Whichever of the coherent frame boundary detection and the differential frame boundary detection first finds a frame boundary, then that frame boundary is used for the frame synchronization. A method of providing string synchronization for GLONASS signals includes performing coherent and differential bit extraction on the GLONASS bits.
摘要翻译：提供用于GPS信号的帧同步的方法可以包括对GPS位执行相干比特提取，然后基于相干比特提取的比特执行相干帧边界检测。同时，可以执行基于差分比特提取的比特的GPS比特差分比特提取和差分帧边界检测。无论哪个相干帧边界检测和差分帧边界检测首先找到帧边界，则该帧边界用于帧同步。为GLONASS信号提供串同步的方法包括在GLONASS位上执行相干和差分位提取。

3. 发明授权

US08754809B2 High sensitivity GLONASS/GPS automatic frequency control 失效
标题翻译：高灵敏度GLONASS / GPS自动频率控制
公开(公告)号：US08754809B2
公开(公告)日：2014-06-17
申请号：US13041312
申请日：2011-03-04
申请人： Hao Zhou , Hao-Jen Cheng , Qinfang Sun
发明人： Hao Zhou , Hao-Jen Cheng , Qinfang Sun
IPC分类号： G01S19/24 , G01S19/21 , G01S19/29
CPC分类号： G01S19/29
摘要： Updates to an AFC loop can be performed to provide high-sensitivity tracking. A 20 ms update interval and PDI=10 ms is used for every other update. A setting is used for each update between the 20 ms updates. Notably, the setting uses PDI=5 ms. The setting can include first, second, and third cross-dot pairs associated with a first bit, a second bit, and a cross-bit boundary between the first and second bits, respectively. A sum of these pairs can be scaled down when the signal strength is below a predetermined threshold. In another embodiment, the setting can include a first cross-dot pair associated with a first bit and a second cross-dot pair associated with a second bit. A sum of these pairs can also be scaled down when signal strength is below a predetermined threshold.
摘要翻译：可以执行AFC循环的更新以提供高灵敏度跟踪。每隔一个更新使用20 ms的更新间隔和PDI = 10 ms。每个20 ms更新之间的更新使用一个设置。值得注意的是，该设置使用PDI = 5 ms。该设置可以分别包括与第一位，第二位和第一和第二位之间的跨位边界相关联的第一，第二和第三十字点对。当信号强度低于预定阈值时，这些对的总和可以缩小。在另一个实施例中，该设置可以包括与第一位相关联的第一交叉点对和与第二位相关联的第二交叉点对。当信号强度低于预定阈值时，这些对的总和也可以缩小。

4. 发明授权

US08855171B2 Satellite signal acquisition 有权
标题翻译：卫星信号采集
公开(公告)号：US08855171B2
公开(公告)日：2014-10-07
申请号：US13207293
申请日：2011-08-10
申请人： Chih-Yuan Chu , Hao Zhou , Hao-Jen Cheng , Qinfang Sun
发明人： Chih-Yuan Chu , Hao Zhou , Hao-Jen Cheng , Qinfang Sun
IPC分类号： H04B1/00 , G01S19/24
CPC分类号： G01S19/246
摘要： A technique for reducing the dwell time in acquiring a satellite signal is provided. The technique minimizes the dwell time in searching for a satellite signal in cells of a search space by comparing the peak-power-to-average ratio (PAPR) to one or more thresholds at one or more intermediate points during the search in a code phase/Doppler frequency bin. The comparison is then used to determine whether to continue the search in a current code phase/Doppler frequency bin or to continue to the next code phase/Doppler frequency bin.
摘要翻译：提供了一种用于减少获取卫星信号的驻留时间的技术。该技术通过将峰值功率平均比（PAPR）与编码阶段的搜索期间的一个或多个中间点处的一个或多个阈值进行比较来最小化在搜索空间的单元中搜索卫星信号的停留时间 /多普勒频率仓。然后比较用于确定是否在当前码相位/多普勒频率仓中继续搜索，或者继续到下一个码相位/多普勒频率仓。

5. 发明申请

US20120223859A1 High Sensitivity GLONASS/GPS Automatic Frequency Control 失效
标题翻译：高灵敏度GLONASS / GPS自动频率控制
公开(公告)号：US20120223859A1
公开(公告)日：2012-09-06
申请号：US13041312
申请日：2011-03-04
申请人： Hao Zhou , Hao-Jen Cheng , Qinfang Sun
发明人： Hao Zhou , Hao-Jen Cheng , Qinfang Sun
IPC分类号： G01S19/24 , H04L27/06
CPC分类号： G01S19/29
摘要： Updates to an AFC loop can be performed to provide high-sensitivity tracking. A 20 ms update interval and PDI=10 ms is used for every other update. A setting is used for each update between the 20 ms updates. Notably, the setting uses PDI=5 ms. The setting can include first, second, and third cross-dot pairs associated with a first bit, a second bit, and a cross-bit boundary between the first and second bits, respectively. A sum of these pairs can be scaled down when the signal strength is below a predetermined threshold. In another embodiment, the setting can include a first cross-dot pair associated with a first bit and a second cross-dot pair associated with a second bit. A sum of these pairs can also be scaled down when signal strength is below a predetermined threshold.
摘要翻译：可以执行AFC循环的更新以提供高灵敏度跟踪。每隔一个更新使用20 ms的更新间隔和PDI = 10 ms。每个20 ms更新之间的更新使用一个设置。值得注意的是，该设置使用PDI = 5 ms。该设置可以分别包括与第一位，第二位和第一和第二位之间的跨位边界相关联的第一，第二和第三十字点对。当信号强度低于预定阈值时，这些对的总和可以缩小。在另一实施例中，该设置可以包括与第一位相关联的第一交叉点对和与第二位相关联的第二交叉点对。当信号强度低于预定阈值时，这些对的总和也可以缩小。

6. 发明申请

US20130039392A1 Satellite Signal Acquisition 有权
标题翻译：卫星信号采集
公开(公告)号：US20130039392A1
公开(公告)日：2013-02-14
申请号：US13207293
申请日：2011-08-10
申请人： Chih-Yuan Chu , Hao Zhou , Hao-Jen Cheng , Qinfang Sun
发明人： Chih-Yuan Chu , Hao Zhou , Hao-Jen Cheng , Qinfang Sun
IPC分类号： H04B1/709
CPC分类号： G01S19/246
摘要： A technique for reducing the dwell time in acquiring a satellite signal is provided. The technique minimizes the dwell time in searching for a satellite signal in cells of a search space by comparing the peak-power-to-average ratio (PAPR) to one or more thresholds at one or more intermediate points during the search in a code phase/Doppler frequency bin. The comparison is then used to determine whether to continue the search in a current code phase/Doppler frequency bin or to continue to the next code phase/Doppler frequency bin.
摘要翻译：提供了一种用于减少获取卫星信号的驻留时间的技术。该技术通过将峰值功率平均比（PAPR）与编码阶段的搜索期间的一个或多个中间点处的一个或多个阈值进行比较来最小化在搜索空间的单元中搜索卫星信号的停留时间 /多普勒频率仓。然后比较用于确定是否在当前码相位/多普勒频率仓中继续搜索，或者继续到下一个码相位/多普勒频率仓。

7. 发明申请

US20130070607A1 WIFI Distance Measurement Using Location Packets 有权
标题翻译： WIFI距离测量使用位置包
公开(公告)号：US20130070607A1
公开(公告)日：2013-03-21
申请号：US13239332
申请日：2011-09-21
申请人： Qinfang Sun , Hao Zhou , Hao-Jen Cheng
发明人： Qinfang Sun , Hao Zhou , Hao-Jen Cheng
IPC分类号： H04W24/00
CPC分类号： G01S5/0205 , G01S5/14 , G01S13/79
摘要： A method of determining a distance between a first wireless device and a second wireless device is provided. In this method, a location symbol can be generated by filtering and modulating a pseudorandom (PRN) code. The location symbol can be provided in a data field of a legacy wireless packet to form a first location packet. The first location packet can be transmitted from the first wireless device to the second wireless device. A second location packet can be transmitted from the second wireless device to the first wireless device, wherein the second location packet is substantially identical to the first location packet. An effective roundtrip time between the first and second wireless devices can be determined based on the first and second location packets. The distance between the first and second wireless devices can be computed using this roundtrip time.
摘要翻译：提供了一种确定第一无线设备和第二无线设备之间的距离的方法。在该方法中，可以通过对伪随机（PRN）码进行滤波和调制来产生位置符号。可以在传统无线分组的数据字段中提供位置符号以形成第一位置分组。第一位置分组可以从第一无线设备发送到第二无线设备。第二位置分组可以从第二无线设备发送到第一无线设备，其中第二位置分组与第一位置分组基本相同。可以基于第一和第二位置分组来确定第一和第二无线设备之间的有效往返时间。可以使用该往返时间来计算第一和第二无线设备之间的距离。

8. 发明授权

US08824606B2 Multiple correlators for communication device detection 有权
标题翻译：用于通信设备检测的多个相关器
公开(公告)号：US08824606B2
公开(公告)日：2014-09-02
申请号：US13465613
申请日：2012-05-07
申请人： Hao-Jen Cheng , Qinfang Sun
发明人： Hao-Jen Cheng , Qinfang Sun
IPC分类号： H03D1/00
CPC分类号： H04L27/0014 , H04L27/16 , H04L27/2331 , H04L2027/0034 , H04L2027/0095
摘要： A receiver unit of a communication device can employ multiple correlators for decoding the access address of a packet received from another communication device. A dynamically determined primary frequency offset is applied to a phase difference signal that is determined from an RF signal that comprises the packet. For each of a plurality of access address decoding chains of the receiver unit, a secondary frequency offset associated with the access address decoding chain is applied to the phase difference signal, the phase difference signal is correlated with a predetermined access address of the communication device, and a resultant correlation output is compared against a correlation threshold. One of the access address decoding chains that generated the correlation output that is greater than the correlation threshold is selected and the packet is demodulated based, at least in part, on the phase difference signal corresponding to the selected access address decoding chain.
摘要翻译：通信设备的接收机单元可以使用多个相关器来解码从另一通信设备接收的分组的接入地址。将动态确定的主频偏移施加到从包括分组的RF信号确定的相位差信号。对于接收机单元的多个接入地址解码链中的每一个，与接入地址解码链相关联的次频偏移被施加到相位差信号，相位差信号与通信设备的预定访问地址相关，并将合成的相关输出与相关阈值进行比较。选择生成大于相关阈值的相关输出的访问地址解码链之一，并且至少部分地基于与所选择的访问地址解码链相对应的相位差信号来解调分组。

9. 发明授权

US08675561B2 WiFi distance measurement using location packets 有权
标题翻译：使用位置数据包进行WiFi距离测量
公开(公告)号：US08675561B2
公开(公告)日：2014-03-18
申请号：US13239332
申请日：2011-09-21
申请人： Qinfang Sun , Hao Zhou , Hao-Jen Cheng
发明人： Qinfang Sun , Hao Zhou , Hao-Jen Cheng
IPC分类号： H04Q7/00
CPC分类号： G01S5/0205 , G01S5/14 , G01S13/79
摘要： A method of determining a distance between a first wireless device and a second wireless device is provided. In this method, a location symbol can be generated by filtering and modulating a pseudorandom (PRN) code. The location symbol can be provided in a data field of a legacy wireless packet to form a first location packet. The first location packet can be transmitted from the first wireless device to the second wireless device. A second location packet can be transmitted from the second wireless device to the first wireless device, wherein the second location packet is substantially identical to the first location packet. An effective roundtrip time between the first and second wireless devices can be determined based on the first and second location packets. The distance between the first and second wireless devices can be computed using this roundtrip time.
摘要翻译：提供了一种确定第一无线设备和第二无线设备之间的距离的方法。在该方法中，可以通过对伪随机（PRN）码进行滤波和调制来产生位置符号。可以在传统无线分组的数据字段中提供位置符号以形成第一位置分组。第一位置分组可以从第一无线设备发送到第二无线设备。第二位置分组可以从第二无线设备发送到第一无线设备，其中第二位置分组基本上与第一位置分组相同。可以基于第一和第二位置分组来确定第一和第二无线设备之间的有效往返时间。可以使用该往返时间来计算第一和第二无线设备之间的距离。

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