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1. 发明授权

US08587477B2 Analog front end for system simultaneously receiving GPS and GLONASS signals 失效
标题翻译：模拟前端用于系统同时接收GPS和GLONASS信号
公开(公告)号：US08587477B2
公开(公告)日：2013-11-19
申请号：US12754521
申请日：2010-04-05
申请人： Hirad Samavati , Qiang Lin , Qinfang Sun , William J. McFarland
发明人： Hirad Samavati , Qiang Lin , Qinfang Sun , William J. McFarland
IPC分类号： G01S19/36 , G01S19/37
CPC分类号： G01S19/37 , G01S19/33 , G01S19/36
摘要： A receiver for receiving both GPS signals and GLONASS signals is provided. This receiver includes an analog front end (AFE), a GPS digital front end (DFE) and a GLONASS DFE for receiving an output of the AFE, and a dual mode interface (DMI) for receiving outputs of the GPS and GLONASS DFEs. Search engines are provided for receiving outputs of the DMI. Notably, certain front-end components of the AFE are configured to process both the GPS signals and the GLONASS signals.
摘要翻译：提供了用于接收GPS信号和GLONASS信号的接收器。该接收机包括用于接收AFE的输出的模拟前端（AFE），GPS数字前端（DFE）和GLONASS DFE，以及用于接收GPS和GLONASS DFE的输出的双模式接口（DMI）。提供搜索引擎用于接收DMI的输出。值得注意的是，AFE的某些前端组件配置为处理GPS信号和GLONASS信号。

2. 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。

3. 发明申请

US20120281734A1 High Sensitivity GPS Receiver 有权
标题翻译：高灵敏度GPS接收机
公开(公告)号：US20120281734A1
公开(公告)日：2012-11-08
申请号：US13549406
申请日：2012-07-13
申请人： Qinfang Sun , Wen-Chang Yeh , Ho-Chung Chen
发明人： Qinfang Sun , Wen-Chang Yeh , Ho-Chung Chen
IPC分类号： H04B1/7075 , G01S19/24 , H04B1/709
CPC分类号： H04L7/0016 , G01S19/24 , G01S19/30 , G01S19/36 , G01S19/37
摘要： A high sensitivity GPS receiver includes an acquisition engine and a tracking engine. The acquisition engine processes GPS satellite data at data rate that is substantially equal to twice the coarse acquisition (CA) code chip rate. This data rate advantageously enables the acquisition engine to process GPS satellite data with relatively less hardware area than traditional GPS acquisition approaches. In one embodiment, the high efficiency acquisition engine may be over-clocked, thereby allowing different phases of a CA code to be correlated quickly. The tracking engine can advantageously process GPS satellite data at a data rate that does not have an integer relationship to the CA code chip rate.
摘要翻译：高灵敏度GPS接收机包括采集引擎和跟踪引擎。采集引擎以基本上等于粗略采集（CA）码片速率的两倍的数据速率处理GPS卫星数据。该数据速率有利地使得采集引擎能够以比传统的GPS采集方法更少的硬件面积来处理GPS卫星数据。在一个实施例中，高效率采集引擎可以被超频，从而允许CA代码的不同阶段快速相关。跟踪引擎可以以不与CA码片速率的整数关系的数据速率有利地处理GPS卫星数据。

4. 发明授权

US08270457B2 High sensitivity GPS receiver 有权
标题翻译：高灵敏度GPS接收机
公开(公告)号：US08270457B2
公开(公告)日：2012-09-18
申请号：US12145918
申请日：2008-06-25
申请人： Qinfang Sun , Wen-Chang Yeh , Ho-Chung Chen
发明人： Qinfang Sun , Wen-Chang Yeh , Ho-Chung Chen
IPC分类号： H04B1/00
CPC分类号： H04L7/0016 , G01S19/24 , G01S19/30 , G01S19/36 , G01S19/37
摘要： A high sensitivity GPS receiver includes an acquisition engine and a tracking engine. The acquisition engine processes GPS satellite data at data rate that is substantially equal to twice the coarse acquisition (CA) code chip rate. This data rate advantageously enables the acquisition engine to process GPS satellite data with relatively less hardware area than traditional GPS acquisition approaches. In one embodiment, the high efficiency acquisition engine may be over-clocked, thereby allowing different phases of a CA code to be correlated quickly. The tracking engine can advantageously processes GPS satellite data at a data rate that does not have an integer relationship to the CA code chip rate.
摘要翻译：高灵敏度GPS接收机包括采集引擎和跟踪引擎。采集引擎以基本上等于粗略采集（CA）码片速率的两倍的数据速率处理GPS卫星数据。该数据速率有利地使得采集引擎能够以比传统的GPS采集方法更少的硬件面积来处理GPS卫星数据。在一个实施例中，高效率采集引擎可以被超频，从而允许CA代码的不同阶段快速相关。跟踪引擎可以以不与CA码片速率的整数关系的数据速率有利地处理GPS卫星数据。

5. 发明申请

US20120075142A1 Multi-Stage GLONASS/GPS Automatic Frequency Control 有权
标题翻译：多级GLONASS / GPS自动频率控制
公开(公告)号：US20120075142A1
公开(公告)日：2012-03-29
申请号：US12894067
申请日：2010-09-29
申请人： Hao Zhou , Qinfang Sun
发明人： Hao Zhou , Qinfang Sun
IPC分类号： G01S19/21
CPC分类号： G01S19/33 , G01S19/24
摘要： A method of providing automatic frequency control pull-in for efficient receipt of GLONASS bits is described. This method can include first determining whether a channel noise (CNo) is greater than or equal to a predetermined value. When the CNo is greater than or equal to the predetermined value, the pull-in can be performed using a first series of predetection integration periods (PDIs) with activated decision-directed flips (DDFs) until a 20 ms boundary of a GLONASS data bit is found. When the CNo is less than the predetermined value, the pull-in can be performed using a second series of PDIs with always deactivated DDFs. A similar method of providing automatic frequency control pull-in for efficient receipt of GPS bits is also described.
摘要翻译：描述了提供自动频率控制拉入以有效接收GLONASS位的方法。该方法可以包括首先确定信道噪声（CNo）是否大于或等于预定值。当CNo大于或等于预定值时，可以使用具有激活的决策导向翻转（DDF）的第一系列预检整合周期（PDI）来执行引入，直到GLONASS数据位的20ms边界被发现。当CNo小于预定值时，可以使用具有永久禁用的DDF的第二系列PDI来执行引入。还描述了提供自动频率控制拉入以有效接收GPS位的类似方法。

6. 发明授权

US08000227B2 Decision feedback channel estimation and pilot tracking for OFDM systems 有权
标题翻译： OFDM系统的决策反馈信道估计和导频跟踪
公开(公告)号：US08000227B2
公开(公告)日：2011-08-16
申请号：US12688733
申请日：2010-01-15
申请人： Qinfang Sun , Won-Joon Choi , Jeffrey M. Gilbert , Ning Zhang , Yi-Hsiu Wang , Tao-Fei Samuel Ng
发明人： Qinfang Sun , Won-Joon Choi , Jeffrey M. Gilbert , Ning Zhang , Yi-Hsiu Wang , Tao-Fei Samuel Ng
IPC分类号： H04J11/00
CPC分类号： H04L25/022 , H04L25/0236 , H04L27/2647 , H04L2025/03522
摘要： Current OFDM systems use a limited number of symbols and/or sub-channels to provide approximations for channel estimations and pilot tracking, i.e. phase estimations. For example, two training symbols in the preamble of a data packet are used to provide channel estimation. Four of the fifty-four sub-channels are reserved for providing phase estimation. However, noise and other imperfections can cause errors in both of these estimations, thereby degrading system performance.Advantageously, decision feedback mechanisms can be provided to significantly improve channel estimation and pilot tracking in OFDM systems. The decision feedback mechanisms can use data symbols in the data packet to improve channel estimation as well as data sub-channels to improve pilot tracking.
摘要翻译：当前OFDM系统使用有限数量的符号和/或子信道来提供用于信道估计和导频跟踪（即相位估计）的近似。例如，使用数据分组的前导码中的两个训练符号来提供信道估计。五十四个子通道中的四个保留用于提供相位估计。然而，噪声和其他缺陷可能会导致这两种估计中的错误，从而降低系统性能。有利地，可以提供决策反馈机制以显着地改善OFDM系统中的信道估计和导频跟踪。决策反馈机制可以使用数据分组中的数据符号来改进信道估计以及数据子信道，以改进导频跟踪。

7. 发明申请

US20110181468A1 Digital Front End In System Simultaneously Receiving GPS And GLONASS Signals 有权
标题翻译：数字前端系统同时接收GPS和GLONASS信号
公开(公告)号：US20110181468A1
公开(公告)日：2011-07-28
申请号：US12754543
申请日：2010-04-05
申请人： Qinfang Sun , Justin Huang , Wen-Chang Yeh
发明人： Qinfang Sun , Justin Huang , Wen-Chang Yeh
IPC分类号： G01S19/33 , G01S19/36
CPC分类号： G01S19/33 , G01S19/21 , G01S19/235 , G01S19/30 , G01S19/36
摘要： A receiver for receiving both GPS signals and GLONASS signals is provided. This receiver includes an analog front end (AFE), a GPS digital front end (DFE) and a GLONASS DFE for receiving an output of the AFE, and a dual mode interface (DMI) for receiving outputs of the GPS and GLONASS DFEs. Search engines are provided for receiving outputs of the DMI. Notably, certain front-end components of the AFE are configured to process both the GPS signals and the GLONASS signals.
摘要翻译：提供了用于接收GPS信号和GLONASS信号的接收器。该接收机包括用于接收AFE的输出的模拟前端（AFE），GPS数字前端（DFE）和GLONASS DFE，以及用于接收GPS和GLONASS DFE的输出的双模式接口（DMI）。提供搜索引擎用于接收DMI的输出。值得注意的是，AFE的某些前端组件配置为处理GPS信号和GLONASS信号。

8. 发明授权

US09253742B1 Fine timing for high throughput packets 有权
标题翻译：高吞吐量数据包的精细时序
公开(公告)号：US09253742B1
公开(公告)日：2016-02-02
申请号：US11947749
申请日：2007-11-29
申请人： Qinfang Sun , Kai Shi
发明人： Qinfang Sun , Kai Shi
IPC分类号： H04J3/06 , H04W56/00 , H04L7/04
CPC分类号： H04W56/00 , H04L7/042
摘要： Improved methods of decoding data symbols of a high throughput (HT) data field in a mixed mode packet are provided. In one embodiment, first and second data symbols of the HT data field can be decoded using timing information derived from a legacy header of the mixed mode packet. In another embodiment, the first data symbol of the HT data field can be decoded using timing information derived from a legacy header of the mixed mode packet, whereas the second data symbol of the HT data field can be decoded using approximately half of the tones of the HT long training field in the mixed mode packet. Subsequent data symbols of the HT data field can be decoded using all tones of the HT long training field in the received mixed mode packet.
摘要翻译：提供了对混合模式分组中的高吞吐量（HT）数据字段的数据符号进行解码的改进方法。在一个实施例中，可以使用从混合模式分组的传统头部导出的定时信息来解码HT数据字段的第一和第二数据符号。在另一个实施例中，可以使用从混合模式分组的传统头部导出的定时信息来解码HT数据字段的第一数据符号，而HT数据字段的第二数据符号可以使用大约一半的 HT长训练场在混合模式包中。可以使用接收到的混合模式分组中的HT长训练字段的所有音调来解码HT数据字段的后续数据符号。

9. 发明授权

US08923421B2 Repetition coding for a wireless system 有权
标题翻译：无线系统的重复编码
公开(公告)号：US08923421B2
公开(公告)日：2014-12-30
申请号：US13356580
申请日：2012-01-23
申请人： Won-Joon Choi , Qinfang Sun , Jeffrey M. Gilbert
发明人： Won-Joon Choi , Qinfang Sun , Jeffrey M. Gilbert
IPC分类号： H04K1/10 , H04L27/28 , H04L1/08
CPC分类号： H04L1/08 , H04L1/0071
摘要： A system and method are disclosed for transmitting data over a wireless channel. In some embodiments, transmitting data includes receiving convolutionally encoded data and enhancing the transmission of the data by further repetition encoding the data.
摘要翻译：公开了一种通过无线信道发送数据的系统和方法。在一些实施例中，发送数据包括接收卷积编码的数据，并通过进一步重复编码数据来增强数据的传输。

10. 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。

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