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184 条记录 (耗时 0.047 秒)

    Disk drive defining non-circular data tracks relative to a rotation axis of the disk
    42.
    发明授权
    Disk drive defining non-circular data tracks relative to a rotation axis of the disk 有权
    磁盘驱动器定义相对于磁盘的旋转轴的非圆形数据轨道

    公开(公告)号：US08717704B1

    公开(公告)日：2014-05-06

    申请号：US13406797

    申请日：2012-02-28

    申请人： Jie Yu ,  Guoxiao Guo ,  Jianguo Zhou ,  Sanghoon Chu ,  Young-Hoon Kim ,  Abhishek Dhanda

    发明人： Jie Yu ,  Guoxiao Guo ,  Jianguo Zhou ,  Sanghoon Chu ,  Young-Hoon Kim ,  Abhishek Dhanda

    IPC分类号： G11B5/58

    CPC分类号： G11B5/58 ,  G11B5/59644

    摘要： A disk drive is disclosed comprising a disk having a plurality of servo tracks defined by servo sectors, and a head actuated over the disk. The disk drive further comprises control circuitry comprising a servo control system operable to position the head over the disk. A disturbance is induced in the servo control system, and while positioning the head over the disk, a data track is accessed. The disturbance induced in the servo control system causes the data track to be non-circular relative to a rotation axis of the disk such that the non-circular data track crosses multiple of the servo tracks over a revolution of the disk.

    摘要翻译： 公开了一种磁盘驱动器，其包括具有由伺服扇区限定的多个伺服磁道的盘，以及在该盘上启动的磁头。 磁盘驱动器还包括控制电路，其包括可操作以将磁头定位在磁盘上的伺服控制系统。 在伺服控制系统中引起干扰，并且当将磁头定位在磁盘上时，可以访问数据磁道。 在伺服控制系统中引起的干扰使得数据轨道相对于盘的旋转轴线是非圆形的，使得非圆形数据轨道在盘的一圈上跨越多个伺服轨道。

    Methods for closed-loop compensation of ultra-high frequency disturbances in hard disk drives and hard disk drives utilizing same
    43.
    发明授权
    Methods for closed-loop compensation of ultra-high frequency disturbances in hard disk drives and hard disk drives utilizing same 失效
    使用硬盘驱动器和硬盘驱动器的超高频干扰的闭环补偿方法

    公开(公告)号：US08630059B1

    公开(公告)日：2014-01-14

    申请号：US13408974

    申请日：2012-02-29

    申请人： Xu Chen ,  Wei Xi ,  Young-Hoon Kim ,  Kuang-Yang Tu

    发明人： Xu Chen ,  Wei Xi ,  Young-Hoon Kim ,  Kuang-Yang Tu

    IPC分类号： G11B5/596

    CPC分类号： G11B5/59694

    摘要： A disk drive comprises a disk, an actuator arm and a servo controller using a position error signal to generate a controller output signal to control the actuator arm. A plant mechanically models at least a portion of the disk drive, receives a control command to which an unknown disturbance is added and generates a plant output. A disturbance observer (DOB) uses the control command and the plant output to generate a delayed and estimated version of the disturbance. The DOB comprises a Q filter having a selected center frequency. A perfect phase cancellation filter (PPCF) is configured to receive the delayed and estimated version of the disturbance, to reject selected disturbances and to align the desired attenuation frequency with the selected center frequency. The output of the PPCF is subtracted from the controller output signal to generate the control command.

    摘要翻译： 磁盘驱动器包括盘，致动器臂和使用位置误差信号的伺服控制器，以产生控制器输出信号以控制致动器臂。 工厂对至少一部分磁盘驱动器进行机械建模，接收到添加了未知扰动的控制命令，并生成工厂输出。 干扰观测器（DOB）使用控制命令和设备输出来产生干扰的延迟和估计版本。 DOB包括具有所选中心频率的Q滤波器。 完美相位消除滤波器（PPCF）被配置为接收干扰的延迟和估计版本，以抑制所选择的干扰并将期望的衰减频率与所选择的中心频率对准。 从控制器输出信号中减去PPCF的输出，生成控制命令。

    Distortion compensation apparatus and apparatus and method for transmitting signal
    44.
    发明授权
    Distortion compensation apparatus and apparatus and method for transmitting signal 有权
    变形补偿装置及其发送信号的方法和装置

    公开(公告)号：US08489043B2

    公开(公告)日：2013-07-16

    申请号：US13006038

    申请日：2011-01-13

    申请人： Gweon-Do Jo ,  Jung-Hoon Oh ,  Joon-Hyung Kim ,  Young-Hoon Kim ,  Jae-Ho Jung ,  Hyun-Kyu Chung

    发明人： Gweon-Do Jo ,  Jung-Hoon Oh ,  Joon-Hyung Kim ,  Young-Hoon Kim ,  Jae-Ho Jung ,  Hyun-Kyu Chung

    IPC分类号： H04B1/04 ,  H04K3/00

    CPC分类号： H03F1/3247 ,  H03F1/26 ,  H03F3/24

    摘要： A distortion compensation apparatus and an apparatus and method for transmitting a signal are provided. The distortion compensation apparatus can extract precise distortion information by adding an additional signal to an input signal during the compensation of distortion in a nonlinear apparatus, and can linearize the nonlinear properties of the nonlinear apparatus using the distortion information. The apparatus for transmitting a signal can output a signal linearized by the same method as that used by the distortion compensation apparatus.

    摘要翻译： 提供了一种用于发送信号的失真补偿装置和装置和方法。 失真补偿装置可以通过在非线性装置的失真补偿期间向输入信号添加附加信号来提取精确的失真信息，并且可以使用失真信息线性化非线性装置的非线性特性。 用于发送信号的装置可以输出与由失真补偿装置使用的方法相同的方法线性化的信号。

    Method for generating and transmitting downlink frame
    45.
    发明授权
    Method for generating and transmitting downlink frame 有权
    用于生成和发送下行帧的方法

    公开(公告)号：US08355464B2

    公开(公告)日：2013-01-15

    申请号：US12515356

    申请日：2007-11-16

    申请人： Kap-Seok Chang ,  Il-Gyu Kim ,  Hyeong-Geun Park ,  Young-Jo Ko ,  Hyo-Seok Yi ,  Young-Hoon Kim ,  Seung-Chan Bang

    发明人： Kap-Seok Chang ,  Il-Gyu Kim ,  Hyeong-Geun Park ,  Young-Jo Ko ,  Hyo-Seok Yi ,  Young-Hoon Kim ,  Seung-Chan Bang

    IPC分类号： H04L27/00

    CPC分类号： H04L5/0053 ,  H04L5/0007 ,  H04L25/0202

    摘要： A downlink frame generation device arrange a plurality of synchronization channel symbols and a plurality of broad-casting channel symbols in a common bandwidth of a system so that the symbols may neighbor each other on the time axis. The downlink frame generation device applies a precoding vector to the synchronization channel symbols and the broadcasting channel symbols to generate a plurality of downlink frames corresponding to a plurality of antennas. The precoding vector is variable by a sector for transmitting a plurality of downlink frames and a subframe in which a plurality of synchronization channel symbols are positioned. The precoding vector is independent of an index of a subcarrier.

    摘要翻译： 下行链路帧产生装置在系统的公共带宽中布置多个同步信道符号和多个广播信道符号，使得符号可以在时间轴上彼此相邻。 下行链路帧生成装置对同步信道符号和广播信道符号应用预编码矢量，生成与多个天线对应的多个下行链路帧。 预编码向量由用于发送多个下行链路帧的扇区和多个同步信道符号所在的子帧可变。 预编码向量与子载波的索引无关。

    Apparatus for generating down link signal, and method and apparatus for cell search in cellular system
    50.
    发明授权
    Apparatus for generating down link signal, and method and apparatus for cell search in cellular system 有权
    用于生成下行链路信号的装置，以及用于蜂窝系统中的小区搜索的方法和装置

    公开(公告)号：US08125976B2

    公开(公告)日：2012-02-28

    申请号：US12159946

    申请日：2007-05-25

    申请人： Kap-Seok Chang ,  Il-Gyu Kim ,  Nam-Il Kim ,  Young-Hoon Kim ,  Seung-Chan Bang

    发明人： Kap-Seok Chang ,  Il-Gyu Kim ,  Nam-Il Kim ,  Young-Hoon Kim ,  Seung-Chan Bang

    IPC分类号： H04J3/06

    CPC分类号： H04L27/2656 ,  H04J11/0079 ,  H04L27/2613 ,  H04L27/2675

    摘要： The invention provides a method of generating a downlink signal and searching a cell on the basis of the downlink signal in an OFDM-based cellular system. The downlink signal includes a plurality of synchronization blocks each having a plurality of sub-frames, and a synchronization pattern composed of a combination of a cell group identification code for identifying a cell group and a frame synchronization identification code for indicating a frame start point is generated in each of the synchronization blocks. Different frame synchronization identification codes are allocated to the synchronization blocks.

    摘要翻译： 本发明提供了一种在基于OFDM的蜂窝系统中基于下行链路信号产生下行链路信号和搜索小区的方法。 下行链路信号包括多个具有多个子帧的同步块，并且由用于识别小区组的小区组识别码和用于指示帧起始点的帧同步识别码的组合构成的同步模式是 在每个同步块中产生。 不同的帧同步识别码被分配给同步块。