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31. 发明申请

US20100014504A1 Multiple-Input Multiple-Output System And Method 有权
标题翻译：多输入多输出系统及方法
公开(公告)号：US20100014504A1
公开(公告)日：2010-01-21
申请号：US12569852
申请日：2009-09-29
申请人： Qinfang Sun , Won-Joon Choi , Jeffrey M. Gilbert , Ardavan Maleki Tehrani
发明人： Qinfang Sun , Won-Joon Choi , Jeffrey M. Gilbert , Ardavan Maleki Tehrani
IPC分类号： H04J3/00 , H04L27/28 , H04L27/06 , H04L27/08 , H04B7/10
CPC分类号： H04B7/0421 , H04B7/0413 , H04B7/0613 , H04B7/0684 , H04L1/0041 , H04L1/0054 , H04L1/0061 , H04L1/06 , H04L1/0656 , H04L1/1819 , H04L1/1829 , H04L5/0048 , H04L25/0204 , H04L25/0226 , H04L27/0014 , H04L2025/03426
摘要： A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may “stomp” on a MIMO packet by transmitting before the transmission of the MIMO packet is complete. Therefore, MIMO systems and methods are provided herein to allow legacy devices to decode the length of a MIMO packet and to restrain from transmitting during that period. These MIMO systems and methods are optimized for efficient transmission of MIMO packets.
摘要翻译：多输入多输出（MIMO）系统可以同时在多个天线上进行发射并同时在多个天线上进行接收。不幸的是，由于遗留802.11a / g设备不能解码多个数据流，所以这样的传统设备可能在完成MIMO分组的传输之前通过发送来“踩踏”MIMO分组。因此，本文提供MIMO系统和方法，以允许传统设备对MIMO分组的长度进行解码并且在该时间段内抑制发射。这些MIMO系统和方法被优化用于MIMO分组的有效传输。

32. 发明申请

US20090079627A1 High Sensitivity GPS Receiver 有权
标题翻译：高灵敏度GPS接收机
公开(公告)号：US20090079627A1
公开(公告)日：2009-03-26
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： G01S1/00
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。

33. 发明申请

US20090010365A1 Repetition coding for a wireless system 审中-公开
标题翻译：无线系统的重复编码
公开(公告)号：US20090010365A1
公开(公告)日：2009-01-08
申请号：US12217300
申请日：2008-07-01
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： H04L27/06
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。

34. 发明申请

US20050226341A1 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：US20050226341A1
公开(公告)日：2005-10-13
申请号：US11150619
申请日：2005-06-10
申请人： Qinfang Sun , Won-Joon Choi , Jeffrey Gilbert , Ning Zhang , Yi-Hsiu Wang , Tao-Fei Ng
发明人： Qinfang Sun , Won-Joon Choi , Jeffrey Gilbert , Ning Zhang , Yi-Hsiu Wang , Tao-Fei Ng
IPC分类号： H04L25/02 , H04L25/03 , H04L27/26 , H04L27/28
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。

35. 发明申请

US20120177027A1 SYSTEM AND METHOD FOR TIME SYNCHRONIZING WIRELESS NETWORK ACCESS POINTS 审中-公开
标题翻译：用于时间同步无线网络接入点的系统和方法
公开(公告)号：US20120177027A1
公开(公告)日：2012-07-12
申请号：US12985645
申请日：2011-01-06
申请人： Sai Venkatraman , Qinfang Sun
发明人： Sai Venkatraman , Qinfang Sun
IPC分类号： H04J3/06
CPC分类号： G01S5/021 , G01S5/145 , G01S19/23 , H04B7/2693 , H04W56/006 , H04W64/00 , H04W84/12
摘要： This disclosure is directed to devices and methods for providing a time synchronized WLAN system. Stationary APs in a WLAN system can determine accurate timing information from a GNSS satellite, so as to synchronize with each other. The synchronized APs can then be used to determine position information for devices on the network using pseudo-ranging techniques.
摘要翻译：本公开涉及用于提供时间同步WLAN系统的设备和方法。 WLAN系统中的固定AP可以确定来自GNSS卫星的准确定时信息，以便彼此同步。然后可以使用同步的AP来使用伪测距技术来确定网络上的设备的位置信息。

36. 发明授权

US08207890B2 Providing ephemeris data and clock corrections to a satellite navigation system receiver 有权
标题翻译：为卫星导航系统接收机提供星历数据和时钟校正
公开(公告)号：US08207890B2
公开(公告)日：2012-06-26
申请号：US12247817
申请日：2008-10-08
申请人： Sai Venkatraman , Janne Jarpenvaa , Qinfang Sun
发明人： Sai Venkatraman , Janne Jarpenvaa , Qinfang Sun
IPC分类号： G01S19/25
CPC分类号： G01S19/05 , G01S19/256 , G01S19/258 , G01S19/27
摘要： A device can access scaled values and scaling factors, which are used to convert the scaled values into coefficients and residuals. The coefficients and residuals can in turn be used with time-dependent functions to reconstruct predicted ephemeris data, including clock correction data, for satellite navigation system satellites. Ephemeris data that is broadcast from any of the satellites can be used to update the calculated ephemeris data.
摘要翻译：设备可以访问缩放的值和缩放因子，用于将缩放的值转换为系数和残差。系数和残差又可以与时间相关函数一起使用，以重建卫星导航系统卫星的预测星历数据，包括时钟校正数据。可以使用从任何卫星广播的星历数据来更新计算出的星历数据。

37. 发明申请

US20120051402A1 Hybrid Bit Extraction For Global Position Receiver 失效
标题翻译：全局位置接收机的混合位提取
公开(公告)号：US20120051402A1
公开(公告)日：2012-03-01
申请号：US12870577
申请日：2010-08-27
申请人： Hao-Ren Cheng , Gaspar Lee , Qinfang Sun
发明人： Hao-Ren Cheng , Gaspar Lee , Qinfang Sun
IPC分类号： H04B1/707
CPC分类号： G01S19/243
摘要： A hybrid bit detection circuit for receiving bits from different global positioning systems, e.g. GPS and GLONASS, can include a frequency lock loop (FLL) for receiving the global positioning bits and removing Doppler frequency error and an integrate and dump (I&D) block coupled to an output of the FLL. A coherent detection circuit can be coupled to an output of the FLL and an output of the integrated and dump block. A differential detection circuit can be coupled to an output of the I&D block. Two parity check blocks can be coupled to outputs of the coherent and differential detection circuits.
摘要翻译：一种用于从不同的全球定位系统接收比特的混合比特检测电路， GPS和GLONASS可以包括用于接收全球定位位和消除多普勒频率误差的频率锁定环（FLL），以及耦合到FLL的输出的积分和转储（I＆D）块。相干检测电路可以耦合到FLL的输出和集成和转储块的输出。差分检测电路可以耦合到I＆D块的输出。两个奇偶校验块可以耦合到相干和差分检测电路的输出。

38. 发明申请

US20120039377A1 Multiple-Input Multiple-Output System And Method 有权
标题翻译：多输入多输出系统及方法
公开(公告)号：US20120039377A1
公开(公告)日：2012-02-16
申请号：US13284803
申请日：2011-10-28
申请人： Qinfang Sun , Won-Joon Choi , Jeffrey M. Gilbert , Ardavan Maleki Tehrani
发明人： Qinfang Sun , Won-Joon Choi , Jeffrey M. Gilbert , Ardavan Maleki Tehrani
IPC分类号： H04L27/00 , H04B17/00 , H04L27/06 , H04L1/06 , H04L27/04 , H04L7/027
CPC分类号： H04B7/0421 , H04B7/0413 , H04B7/0613 , H04B7/0684 , H04L1/0041 , H04L1/0054 , H04L1/0061 , H04L1/06 , H04L1/0656 , H04L1/1819 , H04L1/1829 , H04L5/0048 , H04L25/0204 , H04L25/0226 , H04L27/0014 , H04L2025/03426
摘要： A multiple-input multiple-output (MIMO) system can transmit on multiple antennas simultaneously and receive on multiple antennas simultaneously. Unfortunately, because a legacy 802.11a/g device is not able to decode multiple data streams, such a legacy device may “stomp” on a MIMO packet by transmitting before the transmission of the MIMO packet is complete. Therefore, MIMO systems and methods are provided herein to allow legacy devices to decode the length of a MIMO packet and to restrain from transmitting during that period. These MIMO systems and methods are optimized for efficient transmission of MIMO packets.
摘要翻译：多输入多输出（MIMO）系统可以同时在多个天线上进行发射并同时在多个天线上进行接收。不幸的是，由于遗留802.11a / g设备不能解码多个数据流，所以这样的传统设备可能在完成MIMO分组的传输之前通过发送来“踩踏”MIMO分组。因此，本文提供MIMO系统和方法，以允许传统设备对MIMO分组的长度进行解码并且在该时间段内抑制发射。这些MIMO系统和方法被优化用于MIMO分组的有效传输。

39. 发明授权

US08059734B1 MIMO equalization for wireless communication systems 有权
标题翻译：无线通信系统的MIMO均衡
公开(公告)号：US08059734B1
公开(公告)日：2011-11-15
申请号：US12043497
申请日：2008-03-06
申请人： Qinfang Sun
发明人： Qinfang Sun
IPC分类号： H04K1/10 , H04B1/00 , H04L12/26
CPC分类号： H04B7/0857 , H04L25/03006
摘要： A method to equalize multiple-input multiple-output (MIMO) signals assigns a weight to the output of each receive chain in the MIMO system based on a first noise power value in each receive chain. A second noise power value can be computed using a difference between identical symbols from one or more weighted/un-weighted receive chain signals. Notably, the second noise power value includes thermal noise, phase noise, quantization noise, and distortion noise. The weighted outputs of the receive chains and the second noise power estimate may be used in an equalization calculation to recover the input signal.
摘要翻译：均衡多输入多输出（MIMO）信号的方法基于每个接收链中的第一噪声功率值，为MIMO系统中每个接收链的输出分配权重。可以使用来自一个或多个加权/非加权接收链信号的相同符号之间的差来计算第二噪声功率值。值得注意的是，第二噪声功率值包括热噪声，相位噪声，量化噪声和失真噪声。可以在均衡计算中使用接收链的加权输出和第二噪声功率估计来恢复输入信号。

40. 发明授权

US08018379B1 Automatic gain control in system simultaneously receiving GPS and GLONASS signals 有权
标题翻译：自动增益控制系统同时接收GPS和GLONASS信号
公开(公告)号：US08018379B1
公开(公告)日：2011-09-13
申请号：US12754562
申请日：2010-04-05
申请人： Qinfang Sun , Justin Huang
发明人： Qinfang Sun , Justin Huang
IPC分类号： G01S19/35 , G01S19/33
CPC分类号： G01S19/33 , G01S19/235 , G01S19/36 , G01S19/37
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。

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