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11. 外观设计

USD579802S1 Navigation device 有权
公开(公告)号：USD579802S1
公开(公告)日：2008-11-04
申请号：US29302444
申请日：2008-01-17
申请人： Xiaohui Li , Bingqiang Li , Menghua Liu , Lei Tan , Yunfeng Wu , Jiayong Xiang , Chao Xiong , Yong Huang
设计人： Xiaohui Li , Bingqiang Li , Menghua Liu , Lei Tan , Yunfeng Wu , Jiayong Xiang , Chao Xiong , Yong Huang

12. 外观设计

USD560371S1 Digital photo frame for displaying digital pictures, video clips and playing music 有权
标题翻译：用于显示数码照片，视频剪辑和播放音乐的数码相框
公开(公告)号：USD560371S1
公开(公告)日：2008-01-29
申请号：US29276661
申请日：2007-01-31
申请人： Gang Liu , Bo Qiu , Xiaohui Li , Bingqiang Li , Zhengqing Xiong , Qi Yang , Guangrong Wu
设计人： Gang Liu , Bo Qiu , Xiaohui Li , Bingqiang Li , Zhengqing Xiong , Qi Yang , Guangrong Wu

13. 发明申请

US20050068985A1 Two-stage symbol alignment method for ADSL transmission in the presence of TCM-ISDN interferers 有权
标题翻译：在TCM-ISDN干扰源存在的情况下进行ADSL传输的两阶段符号对齐方法
公开(公告)号：US20050068985A1
公开(公告)日：2005-03-31
申请号：US10674922
申请日：2003-09-30
申请人： Xiaohui Li
发明人： Xiaohui Li
IPC分类号： H04B3/10
CPC分类号： H04L27/2656 , H04L25/03006 , H04L27/2662 , H04L27/2675
摘要： Method embodiments for achieving hyperframe symbol synchronization are disclosed, along with device and system embodiments for implementing such methods. In one embodiment, the method comprises: receiving a pilot signal having at least two phase states; measuring the pilot signal as a sequence of measured symbols; and determining an alignment offset upon detecting between adjacent measure symbols a phase difference greater than a predetermined threshold. The alignment offset determination may include: forming a data field of four measured symbols around the detected phase difference; searching for the position of a two-symbol window in the data field that maximizes a phase difference; and calculating the alignment offset from this position.
摘要翻译：公开了用于实现超帧符号同步的方法实施例，以及用于实现这种方法的设备和系统实施例。在一个实施例中，该方法包括：接收具有至少两个相位状态的导频信号; 测量导频信号作为测量符号序列; 以及在相邻测量符号之间检测大于预定阈值的相位差时确定对准偏移。对准偏移确定可以包括：围绕检测到的相位差形成四个测量符号的数据场; 在数据字段中搜索最大化相位差的双符号窗口的位置; 并从该位置计算对准偏移。

14. 发明授权

US07292606B2 Two-stage symbol alignment method for ADSL transmission in the presence of TCM-ISDN interferers 有权
标题翻译：在TCM-ISDN干扰源存在的情况下进行ADSL传输的两阶段符号对齐方法
公开(公告)号：US07292606B2
公开(公告)日：2007-11-06
申请号：US10674922
申请日：2003-09-30
申请人： Xiaohui Li
发明人： Xiaohui Li
IPC分类号： H04B3/10
CPC分类号： H04L27/2656 , H04L25/03006 , H04L27/2662 , H04L27/2675
摘要： Method embodiments for achieving hyperframe symbol synchronization are disclosed, along with device and system embodiments for implementing such methods. In one embodiment, the method comprises: receiving a pilot signal having at least two phase states; measuring the pilot signal as a sequence of measured symbols; and determining an alignment offset upon detecting between adjacent measure symbols a phase difference greater than a predetermined threshold. The alignment offset determination may include: forming a data field of four measured symbols around the detected phase difference; searching for the position of a two-symbol window in the data field that maximizes a phase difference; and calculating the alignment offset from this position.
摘要翻译：公开了用于实现超帧符号同步的方法实施例，以及用于实现这种方法的设备和系统实施例。在一个实施例中，该方法包括：接收具有至少两个相位状态的导频信号; 测量导频信号作为测量符号序列; 以及在相邻测量符号之间检测大于预定阈值的相位差时确定对准偏移。对准偏移确定可以包括：围绕检测到的相位差形成四个测量符号的数据场; 在数据字段中搜索最大化相位差的双符号窗口的位置; 并从该位置计算对准偏移。

15. 发明授权

US07133444B2 Combined equalization for DMT-based modem receiver 有权
标题翻译：基于DMT的调制解调器接收机的组合均衡
公开(公告)号：US07133444B2
公开(公告)日：2006-11-07
申请号：US10229652
申请日：2002-08-28
申请人： Xiaohui Li , Mark A. Curry
发明人： Xiaohui Li , Mark A. Curry
IPC分类号： H04B7/00 , H04B1/38 , H03K7/00 , H04L27/28
CPC分类号： H04L25/03159 , H04L2025/03414 , H04L2025/03484
摘要： A DMT modem (40) is disclosed, in which a combined time domain equalizer and per-tone equalizer is applied to a received DMT signal. The combined equalizer includes a first FFT function (44) that is applied to a set of samples in a time-domain signal after the application of a time domain equalizer (42). The first FFT function (44) produces an initial FFT result, that is accumulated with a sliding FFT (46) performed upon difference values in the time domain samples. The sliding FFT results are applied to a per-ton equalizer (48) which applies a set of complex coefficients determined in training of the modem. A simple 1-tap FEQ (50) then can recover the signal. The combined equalizer enables per-tone equalization, in a manner that is compatible with conventional DSL training standards. According to a second embodiment, the per-tone equalization is performed only on selected tones of the multitone signal.
摘要翻译：公开了一种DMT调制解调器（40），其中组合的时域均衡器和每音调均衡器被应用于所接收的DMT信号。组合均衡器包括在应用时域均衡器（42）之后，将时域信号中的一组样本应用于第一FFT函数（44）。第一FFT函数（44）产生初始FFT结果，其通过对时域样本中的差值执行的滑动FFT（46）而累加。滑动FFT结果被应用于应用在调制解调器的训练中确定的一组复系数的每吨均衡器（48）。一个简单的1抽头FEQ（50）可以恢复信号。组合均衡器以与常规DSL训练标准兼容的方式实现每音调均衡。根据第二实施例，仅对多音信号的所选音调执行全音均衡。

16. 发明授权

US5854974A Compensated ring mixers 失效
标题翻译：补偿环形混合器
公开(公告)号：US5854974A
公开(公告)日：1998-12-29
申请号：US420249
申请日：1995-04-11
申请人： Xiaohui Li
发明人： Xiaohui Li
IPC分类号： H03D7/02 , H03D7/14 , H04B1/26
CPC分类号： H03D7/1408
摘要： A compensated mixer including a radio frequency (RF) balun through which RF signals are transferred, and a local oscillator (LO) balun for receiving an LO signal. In an exemplary implementation the mixer further includes a diode ring quad circuit for mixing RF signals received by the RF balun with the LO signal received by the LO balun. During operation the diode ring quad circuit develops, between first and second nodes therein, a capacitive reactance arising from switching at the LO frequency. The mixer further includes a compensation inductor, connected between the first and second nodes, for cancelling the effect of the capacitive reactance at the LO signal frequency.
摘要翻译：包括RF信号被传送的射频（RF）平衡不平衡变压器和用于接收LO信号的本地振荡器（LO）平衡 - 不平衡变压器的补偿混频器。在示例性实施例中，混频器还包括用于将由RF平衡 - 不平衡变换器接收的RF信号与由LO平衡 - 不平衡变换器接收的LO信号混合的二极管环四路电路。在操作期间，二极管环四路电路在其中的第一和第二节点之间产生由LO频率处的开关引起的容性电抗。混频器还包括连接在第一和第二节点之间的补偿电感器，用于消除在LO信号频率处的电容性电抗的影响。

17. 发明授权

US5678226A Unbalanced FET mixer 失效
标题翻译：不平衡FET混频器
公开(公告)号：US5678226A
公开(公告)日：1997-10-14
申请号：US333775
申请日：1994-11-03
申请人： Xiaohui Li , Michael Wendell Vice
发明人： Xiaohui Li , Michael Wendell Vice
IPC分类号： H03D7/12 , H04B1/28
CPC分类号： H03D7/125 , H04B1/28
摘要： A unbalanced mixer capable of operation in the absence of DC bias is disclosed herein. The mixer includes an input or local oscillator (LO) port for receiving an input signal. A first transistor has a control terminal coupled to the mixer input port, and an output terminal coupled to a first signal port of the mixer. The mixer further includes a resonator circuit, connected between the transistor control and output terminals, for providing signal isolation between the mixer input port and the first signal port. In a preferred implementation the resonator circuit comprises an inductive element in parallel with a first intrinsic capacitance of the transistor. The mixer may also include a diplexer circuit for coupling signal energy of a first frequency between the output terminal and the first signal port, and for coupling signal energy of a second frequency between the output terminal and a second signal port. A series resonant circuit, connected between the input or LO port and the transistor control terminal, may also be provided for amplifying the input signal. In a preferred implementation the series resonant circuit comprises an input inductive element and an input intrinsic capacitance of the first transistor.
摘要翻译：本文公开了能够在没有DC偏压的情况下操作的不平衡混合器。混频器包括用于接收输入信号的输入或本地振荡器（LO）端口。第一晶体管具有耦合到混频器输入端口的控制端子和耦合到混频器的第一信号端口的输出端子。混频器还包括连接在晶体管控制和输出端之间的谐振器电路，用于在混频器输入端口和第一信号端口之间提供信号隔离。在优选实施例中，谐振器电路包括与晶体管的第一本征电容并联的电感元件。混频器还可以包括用于耦合在输出端和第一信号端口之间的第一频率的信号能量的双工器电路，以及用于耦合输出端和第二信号端口之间的第二频率的信号能量。连接在输入或LO端口和晶体管控制端子之间的串联谐振电路也可以用于放大输入信号。在优选实施例中，串联谐振电路包括输入电感元件和第一晶体管的输入固有电容。

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