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1. 发明授权

US08498591B1 Digital Predistortion for nonlinear RF power amplifiers 有权
标题翻译：非线性射频功率放大器的数字预失真
公开(公告)号：US08498591B1
公开(公告)日：2013-07-30
申请号：US12860108
申请日：2010-08-20
申请人： Hua Qian , Songping Wu , Daxiao Yu
发明人： Hua Qian , Songping Wu , Daxiao Yu
IPC分类号： H04B1/04 , H03C1/62
CPC分类号： H04L1/0035 , H03F1/3241 , H04B1/0475 , H04B2001/0425
摘要： Systems and techniques relating to wireless communications are described. A described technique includes generating a digital transmit signal, receiving a digital receive signal, storing signal samples, the signal samples including transmit samples based on the digital transmit signal and receive samples based on the digital receive signal, causing, in a predistortion training mode, the digital receive signal to be based on an amplified analog version of the digital transmit signal, where the amplified analog version is produced by a power amplifier having one or more nonlinear characteristics, determining a synchronization offset value to align the transmit samples with the receive samples, determining one or more power normalization parameter values to normalize a power of the digital receive signal with respect to the digital transmit signal, estimating predistortion parameter values, and using the predistortion parameter values to predistort digital signals to compensate for the one or more nonlinear characteristics of the power amplifier. Estimating predistortion parameter values can include using information comprising the transmit samples, the receive samples, the synchronization offset value, and the one or more power normalization parameter values.
摘要翻译：描述与无线通信相关的系统和技术。所描述的技术包括产生数字发送信号，接收数字接收信号，存储信号采样，信号样本包括基于数字发送信号的发送采样，并且基于数字接收信号接收采样，以预失真训练模式，所述数字接收信号将基于所述数字发射信号的放大的模拟版本，其中所述放大的模拟版本由具有一个或多个非线性特性的功率放大器产生，确定同步偏移值以使所述发射样本与所述接收样本，确定一个或多个功率归一化参数值以相对于所述数字发射信号归一化所述数字接收信号的功率，估计预失真参数值，以及使用所述预失真参数值来预失真数字信号以补偿所述一个或多个非线性特性的功率放大器。估计预失真参数值可以包括使用包括发送样本，接收样本，同步偏移值和一个或多个功率归一化参数值的信息。

2. 发明授权

US08050643B1 RF-AGC scheme insensitive to channel interference and deep fading 有权
标题翻译： RF-AGC方案对信道干扰和深度衰落不敏感
公开(公告)号：US08050643B1
公开(公告)日：2011-11-01
申请号：US12118357
申请日：2008-05-09
申请人： Songping Wu , Hua Qian , Gang Liu , King Chun Tsai , Lawrence Tse , Hui-Ling Lou
发明人： Songping Wu , Hua Qian , Gang Liu , King Chun Tsai , Lawrence Tse , Hui-Ling Lou
IPC分类号： H04B7/00
CPC分类号： H04W52/52 , H03G3/3068
摘要： In a method and system for controlling gain in an RF receiver, an RF signal is analyzed over different attack and decay windows, from which the receiver determines (1) if the signal is in an attack condition with dip values below a threshold level thus indicating a need for increasing signal gain, or (2) if the signal is in a decay condition with threshold values above a threshold level thus indicating a need for decreasing signal gain. The receiver applies attack and decay windows of different sizes and in an asynchronous manner to create a gain control scheme that is insensitive to transient effects such as channel interference and deep fading that affect the intensities of an in-band signal.
摘要翻译：在用于控制RF接收机中的增益的方法和系统中，通过不同的攻击和衰减窗口分析RF信号，接收机从该接收机确定（1）如果信号处于攻击条件，其中dip值低于阈值水平，因此指示增加信号增益的需要，或者（2）如果信号处于具有高于阈值电平的阈值的衰减条件，从而指示需要降低信号增益。接收机以异步方式应用不同大小的攻击和衰减窗口，以创建一种对影响带内信号强度的信道干扰和深衰落等瞬态效应不敏感的增益控制方案。

3. 发明授权

US07376920B2 Method to monitor critical dimension of IC interconnect 有权
标题翻译：监测IC互连关键尺寸的方法
公开(公告)号：US07376920B2
公开(公告)日：2008-05-20
申请号：US11398980
申请日：2006-04-06
申请人： Hua Qian , Ching Thiam Chung
发明人： Hua Qian , Ching Thiam Chung
IPC分类号： G06F9/45 , G06F17/50 , G01R31/08 , G01R31/02 , G01R27/00 , G01R13/00
CPC分类号： G01R31/2853
摘要： An example method of monitoring and measuring the line width of interconnects comprising the following steps. First, we measure an I-V profile of a sample interconnect structure to obtain a sample I-V profile. The I-V profile is comprised of leakage current measurements at two or more voltages. The sample interconnect structure is comprised of spaced lines having a line spacing. Next we compare the sample I-V profile with a reference I-V profile at a reference line spacing to determine if sample interconnect structure is not defective. If the sample I-V profile is similar to the reference I-V profile, then leakage currents for the sample interconnect structure are derived from the I-V profiles at a selected voltages. Then we calculate the line spacing of the sample interconnect structure using the sample I-V profile.
摘要翻译：监视和测量互连线宽的示例方法，包括以下步骤。首先，我们测量样品互连结构的I-V轮廓以获得样品I-V轮廓。 I-V曲线由两个或多个电压下的漏电流测量组成。样品互连结构由具有线间隔的间隔线组成。接下来，我们将样本I-V剖面与参考线间距的参考I-V剖面进行比较，以确定样本互连结构是否没有缺陷。如果样品I-V剖面图与参考I-V剖面相似，则样品互连结构的漏电流在选定电压下从I-V剖面得出。然后我们使用样品I-V曲线计算样品互连结构的线间距。

4. 发明授权

US09083385B2 Channel decoding method and decoder for tail-biting codes 有权
标题翻译：通道解码方法和解码器，用于尾码
公开(公告)号：US09083385B2
公开(公告)日：2015-07-14
申请号：US13809932
申请日：2012-03-19
申请人： Xiaotao Wang , Hua Qian , Jing Xu , Hao Huang , Yang Yang , Fang Wang
发明人： Xiaotao Wang , Hua Qian , Jing Xu , Hao Huang , Yang Yang , Fang Wang
IPC分类号： H03M13/03 , H03M13/23 , H03M13/37 , H03M13/41 , H03M13/00 , H03M13/15
CPC分类号： H03M13/23 , H03M13/1505 , H03M13/3738 , H03M13/413 , H03M13/6505 , H03M13/6525
摘要： A channel decoding method and decoder are disclosed. The decoding method is based on a Circular Viterbi Algorithm (CVA), rules out impossible initial states one by one through iterations according the received soft information sequence, and finally finds the global optimal tail-biting path. In the present invention, all impossible iterations are ruled out through multiple iterations, and only the initial state having most likelihood with the received sequence survives. The algorithm is finally convergent to an optimal tail-biting path to be output. In addition, the method also updates a metric of a maximum likelihood tail-biting path (MLTBP) or rules out impossible initial states through the obtained surviving tail-biting path, thereby effectively solving the problem that the algorithm is not convergent due to a circular trap, providing a practical optimal decoding algorithm for a tail-biting convolutional code, reducing the complexity of an existing decoding scheme, and saving the storage space.
摘要翻译：公开了一种信道解码方法和解码器。解码方法基于循环维特比算法（CVA），根据接收到的软信息序列逐个排除不可能的初始状态，最终找到全局最优尾巴路径。在本发明中，通过多次迭代排除所有不可能的迭代，并且只有具有接收序列的最可能性的初始状态才能存活。该算法最终收敛到要输出的最佳尾巴路径。另外，该方法还通过所获得的幸存尾巴路径来更新最大似然尾巴路径（MLTBP）的度量或者排除不可能的初始状态，从而有效地解决了算法由于循环而不会收敛的问题陷阱，为尾部卷积码提供实用的最佳解码算法，降低了现有解码方案的复杂度，并节省了存储空间。

5. 发明申请

US20070247167A1 Method to monitor critical dimension of IC interconnect 有权
标题翻译：监测IC互连关键尺寸的方法
公开(公告)号：US20070247167A1
公开(公告)日：2007-10-25
申请号：US11398980
申请日：2006-04-06
申请人： Hua Qian , Ching Chung
发明人： Hua Qian , Ching Chung
IPC分类号： G01R31/02
CPC分类号： G01R31/2853
摘要： An example method of monitoring and measuring the line width of interconnects comprising the following steps. First, we measure an I-V profile of a sample interconnect structure to obtain a sample I-V profile. The I-V profile is comprised of leakage current measurements at two or more voltages. The sample interconnect structure is comprised of spaced lines having a line spacing. Next we compare the sample I-V profile with a reference I-V profile at a reference line spacing to determine if sample interconnect structure is not defective. If the sample I-V profile is similar to the reference I-V profile, then leakage currents for the sample interconnect structure are derived from the I-V profiles at a selected voltages. Then we calculate the line spacing of the sample interconnect structure using the sample I-V profile.
摘要翻译：监视和测量互连线宽的示例方法，包括以下步骤。首先，我们测量样品互连结构的I-V轮廓以获得样品I-V轮廓。 I-V曲线由两个或多个电压下的漏电流测量组成。样品互连结构由具有线间隔的间隔线组成。接下来，我们将样本I-V剖面与参考线间距的参考I-V剖面进行比较，以确定样本互连结构是否没有缺陷。如果样品I-V剖面图与参考I-V剖面相似，则样品互连结构的漏电流在选定电压下从I-V剖面得出。然后我们使用样品I-V曲线计算样品互连结构的线间距。

6. 发明授权

US06963472B2 Flexural pivot for rotary disc drive actuator 失效
标题翻译：用于旋转磁盘驱动器执行器的弯曲枢轴
公开(公告)号：US06963472B2
公开(公告)日：2005-11-08
申请号：US09894480
申请日：2001-06-27
申请人： Zhimin He , Guoxiao Guo , Hua Qian , EngHong Ong
发明人： Zhimin He , Guoxiao Guo , Hua Qian , EngHong Ong
IPC分类号： G11B5/54 , G11B5/55 , G11B21/16
CPC分类号： G11B5/5521
摘要： The present invention provides for a flexural pivot that can be fitted within a cavity of an actuator. The pivot includes a first member that can be coupled to the wall defining the cavity and a second member that can be mounted to the disc drive housing component of the disc drive. At least two leaves join external surfaces of the first member to the second member.The present invention offers a flexural pivot that can be easily incorporated with rotary actuators traditionally designed for use with a ball bearing pivot cartridge. In addition, it avoids the difficulties encountered by conventional designs when trying to assemble intersecting flat springs within a cylindrical sleeve. Furthermore, in comparison with conventional flexural pivots that are located outside the actuator body, the present invention provides a compact pivot that can be mounted substantially in a cavity of the actuator body such that the center of rotation of the actuator is located nearer the center of mass.
摘要翻译：本发明提供了一种可以安装在致动器的空腔内的弯曲枢轴。该枢轴包括可连接到限定空腔的壁的第一构件和可安装到盘驱动器的盘驱动器壳体部件的第二构件。至少两个叶片将第一构件的外表面连接到第二构件。本发明提供一种弯曲枢轴，其可以容易地结合有传统上设计用于与球轴承枢轴筒一起使用的旋转致动器。此外，它避免了当试图在圆柱形套筒内组装交叉的平面弹簧时常规设计遇到的困难。此外，与位于致动器主体外部的常规弯曲枢轴相比，本发明提供了一种紧凑的枢轴，其可以基本上安装在致动器本体的空腔中，使得致动器的旋转中心位于质量

7. 发明申请

US20130111305A1 CHANNEL DECODING METHOD AND DECODER FOR TAIL-BITING CODES 有权
标题翻译：信道解码方法和解码器
公开(公告)号：US20130111305A1
公开(公告)日：2013-05-02
申请号：US13809932
申请日：2012-03-19
申请人： Xiaotao Wang , Hua Qian , Jing Xu , Hao Huang , Yang Yang , Fang Wang
发明人： Xiaotao Wang , Hua Qian , Jing Xu , Hao Huang , Yang Yang , Fang Wang
IPC分类号： H03M13/23
CPC分类号： H03M13/23 , H03M13/1505 , H03M13/3738 , H03M13/413 , H03M13/6505 , H03M13/6525
摘要： A channel decoding method and decoder are disclosed. The decoding method is based on a Circular Viterbi Algorithm (CVA), rules out impossible initial states one by one through iterations according the received soft information sequence, and finally finds the global optimal tail-biting path. In the present invention, all impossible iterations are ruled out through multiple iterations, and only the initial state having most likelihood with the received sequence survives. The algorithm is finally convergent to an optimal tail-biting path to be output. In addition, the method also updates a metric of a maximum likelihood tail-biting path (MLTBP) or rules out impossible initial states through the obtained surviving tail-biting path, thereby effectively solving the problem that the algorithm is not convergent due to a circular trap, providing a practical optimal decoding algorithm for a tail-biting convolutional code, reducing the complexity of an existing decoding scheme, and saving the storage space.
摘要翻译：公开了一种信道解码方法和解码器。解码方法基于循环维特比算法（CVA），根据接收到的软信息序列逐个排除不可能的初始状态，最终找到全局最优尾巴路径。在本发明中，通过多次迭代排除所有不可能的迭代，并且只有具有接收序列的最可能性的初始状态才能存活。该算法最终收敛到要输出的最佳尾巴路径。另外，该方法还通过所获得的幸存尾巴路径来更新最大似然尾巴路径（MLTBP）的度量或者排除不可能的初始状态，从而有效地解决了算法由于循环而不会收敛的问题陷阱，为尾部卷积码提供实用的最佳解码算法，降低了现有解码方案的复杂度，并节省了存储空间。

8. 发明申请

US20130026370A1 METHODS AND SYSTEMS FOR SCATTER ESTIMATION IN POSITRON EMISSION TOMOGRAPHY 有权
标题翻译：方法和系统在排气排放测量中的散射估计
公开(公告)号：US20130026370A1
公开(公告)日：2013-01-31
申请号：US13191205
申请日：2011-07-26
申请人： Hua Qian , Ravindra Mohan Manjeshwar , Kris Filip Johan Jules Thielemans
发明人： Hua Qian , Ravindra Mohan Manjeshwar , Kris Filip Johan Jules Thielemans
IPC分类号： G01T1/164
CPC分类号： G01T1/1615 , A61B6/037 , G06T11/005
摘要： Methods and systems for multiple scatter estimation in Positron Emission Tomography (PET) are provided. One method includes determining attenuation sinograms and determining a varying convolution kernel as a function of the attenuation sinograms, wherein the kernel varies in amplitude and width over a radial length of a PET imaging system. The method also includes using the varying convolution kernel to estimate multiple PET scatter.
摘要翻译：提供了正电子发射断层扫描（PET）中多重散射估计的方法和系统。一种方法包括确定衰减正弦图并确定作为衰减正弦图的函数的变化的卷积核，其中所述核在PET成像系统的径向长度上的幅度和宽度上变化。该方法还包括使用变化的卷积核估计多个PET散射。

9. 发明授权

US08575554B2 Methods and systems for scatter estimation in positron emission tomography 有权
标题翻译：正电子发射断层扫描中散射估计的方法和系统
公开(公告)号：US08575554B2
公开(公告)日：2013-11-05
申请号：US13191205
申请日：2011-07-26
申请人： Hua Qian , Ravindra Mohan Manjeshwar , Kris Filip Johan Jules Thielemans
发明人： Hua Qian , Ravindra Mohan Manjeshwar , Kris Filip Johan Jules Thielemans
IPC分类号： G01T1/164 , A61B6/00 , G06K9/00
CPC分类号： G01T1/1615 , A61B6/037 , G06T11/005
摘要： Methods and systems for multiple scatter estimation in Positron Emission Tomography (PET) are provided. One method includes determining attenuation sinograms and determining a varying convolution kernel as a function of the attenuation sinograms, wherein the kernel varies in amplitude and width over a radial length of a PET imaging system. The method also includes using the varying convolution kernel to estimate multiple PET scatter.
摘要翻译：提供了正电子发射断层扫描（PET）中多重散射估计的方法和系统。一种方法包括确定衰减正弦图并确定作为衰减正弦图的函数的变化的卷积核，其中所述核在PET成像系统的径向长度上的幅度和宽度上变化。该方法还包括使用变化的卷积核估计多个PET散射。

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