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89 条记录 (耗时 0.034 秒)

    Method of changing frequency assignment status in broadband wireless access system
    2.
    发明授权
    Method of changing frequency assignment status in broadband wireless access system 有权
    在宽带无线接入系统中改变频率分配状态的方法

    公开(公告)号：US08681732B2

    公开(公告)日：2014-03-25

    申请号：US12808493

    申请日：2008-10-14

    申请人： Chul Park ,  Kwang Jae Lim ,  Hyun Lee ,  Chul Sik Yoon

    发明人： Chul Park ,  Kwang Jae Lim ,  Hyun Lee ,  Chul Sik Yoon

    IPC分类号： H04W4/00

    CPC分类号： H04W36/06 ,  H04W36/22 ,  H04W72/0453

    摘要： The present invention relates to a method of changing a frequency assignment (FA) status in an improved broadband wireless access system where terminals and base stations communicate with each other by using a plurality of FAs. The base station changes the status of one of secondary FA into the status of the pFA in order to adjust a load of the primary FA, and communicates with the terminal through the pFA of which status is changed. When a response is received from the terminal, the base station changes the status of the pFA and communicates with the pFA of the terminal through a new pFA. The status of a previous pFA between the base station and the terminal is changed into the status of the sFA, and a previous sFA is changed into the pFA, so that communication is performed through new FAs.

    摘要翻译： 本发明涉及一种在改进的宽带无线接入系统中改变频率分配（FA）状态的方法，其中终端和基站通过使用多个FA彼此通信。 基站将一个辅助FA的状态改变为pFA的状态，以调整主FA的负载，并通过其状态改变的pFA与终端通信。 当从终端接收到响应时，基站改变pFA的状态，并通过新的pFA与终端的pFA进行通信。 基站和终端之间的先前pFA的状态被改变为sFA的状态，并且先前的sFA被改变为pFA，以便通过新的FA进行通信。

    WHEEL DRIVER AND PORTABLE ELECTRONIC DEVICE HAVING THE SAME
    5.
    发明申请
    WHEEL DRIVER AND PORTABLE ELECTRONIC DEVICE HAVING THE SAME 有权
    车轮驱动器和便携式电子设备

    公开(公告)号：US20100117995A1

    公开(公告)日：2010-05-13

    申请号：US12615030

    申请日：2009-11-09

    申请人： Seong-Ha PARK ,  Chul Park ,  Seung-Jun Kim ,  Joong-Wan Park ,  Sung-Won Kim

    发明人： Seong-Ha PARK ,  Chul Park ,  Seung-Jun Kim ,  Joong-Wan Park ,  Sung-Won Kim

    IPC分类号： G06F3/033 ,  H03M11/00

    CPC分类号： H03M1/287 ,  G01D5/2451 ,  G01D5/34715 ,  G06F3/0317 ,  G06F3/0362

    摘要： A pattern wheel driver is provided. The pattern wheel driver includes a rotatable pattern wheel with patterned regions repeatedly formed on the pattern wheel. Each of the patterned regions has a plurality of patterns. Each of the plurality of patterns has a different width. The pattern wheel driver also includes a detector for detecting the plurality of patterns, mounted at a position where the patterned regions of the pattern wheel pass when the pattern wheel rotates. The pattern wheel driver also includes an encoder for producing a signal indicating whether the pattern wheel rotates in a forward direction or a reverse direction based on signals produced by the detector.

    摘要翻译： 提供图案轮驱动器。 图案轮驱动器包括具有重复形成在图案轮上的图案区域的可旋转图案轮。 每个图案化区域具有多个图案。 多个图案中的每一个具有不同的宽度。 图案轮驱动器还包括用于检测多个图案的检测器，该检测器安装在图案轮转动时图案轮的图案区域通过的位置处。 图案轮驱动器还包括编码器，用于根据由检测器产生的信号产生指示图案轮是沿正向还是相反方向旋转的信号。

    Direct-conversion receiver and sub-harmonic frequency mixer thereof
    7.
    发明申请
    Direct-conversion receiver and sub-harmonic frequency mixer thereof 有权
    直接转换接收机及其次谐波频率混频器

    公开(公告)号：US20070242779A1

    公开(公告)日：2007-10-18

    申请号：US11403819

    申请日：2006-04-14

    申请人： Byoung Choi ,  Chul Park ,  NoGil Myoung

    发明人： Byoung Choi ,  Chul Park ,  NoGil Myoung

    IPC分类号： H04L27/22

    CPC分类号： H04B1/30

    摘要： Provided is a sub-harmonic frequency mixer having a structure in which two terminals of transistors receiving a Radio Frequency (RF) signal and a Local Oscillation (LO) signal are coupled. The frequency mixer is composed of a single-level structure of transistors and thus can be driven at a lower supply voltage compared to a common frequency mixer. A direct-conversion receiver employing such a frequency mixer needs an RF signal and an LO signal sources of single-phase. Therefore, the direct-conversion receiver has an architecture that simplifies a whole RF transceiver circuit and thus can be advantageously applied in implementing SoC (System-on-Chip) for a low power, high integration, low price and subminiature wireless transceiver circuit.

    摘要翻译： 提供了一种亚谐波混频器，其具有接收射频（RF）信号和本地振荡（LO）信号的晶体管的两个端子耦合的结构。 混频器由晶体管的单级结构组成，因此与普通的混频器相比可以在较低的电源电压下驱动。 采用这种混频器的直接转换接收机需要RF信号和单相的LO信号源。 因此，直接转换接收机具有简化整个RF收发器电路的架构，因此可以有利地应用于实现用于低功率，高集成度，低价格和超小型无线收发器电路的SoC（片上系统）。

    Method of testing servo burst signals of hard disk drive and recording medium adapted therefor
    9.
    发明授权
    Method of testing servo burst signals of hard disk drive and recording medium adapted therefor 失效
    测试硬盘驱动器和其适应的记录介质的伺服脉冲串信号的方法

    公开(公告)号：US07203024B2

    公开(公告)日：2007-04-10

    申请号：US11041941

    申请日：2005-01-26

    申请人： Yong-gwon Lee ,  Sang-hoon Chu ,  Chul Park ,  Cheol-hoon Park

    发明人： Yong-gwon Lee ,  Sang-hoon Chu ,  Chul Park ,  Cheol-hoon Park

    IPC分类号： G11B5/596

    CPC分类号： G11B5/59627 ,  G11B5/59633

    摘要： A method of testing quality of a servo burst signal recorded on a hard disk drive and a recording medium adapted therefor, the hard disk drive including a plurality of sectors within one track and the burst signals for servo control recorded radially on each sector. The method includes: detecting peak positions at a radial position in which amplitudes of the recorded burst signals peak respectively on each track; comparing the detected peak positions of the burst signals on each track; detecting peak position error count, the peak position error count being a number of tracks in which offset of the detected peak positions exceed an offset limit within a predetermined number of tracks; and if the peak position error count exceeds the offset limit, determining a write quality of the servo burst signal to be low. A servo burst signal recorded with uniform intensity and a servo burst signal recorded with shift from normal position can be detected. Therefore, the quality of a servo burst signal can be managed efficiently.

    摘要翻译： 一种测试记录在适于其的硬盘驱动器和记录介质上的伺服脉冲信号的质量的方法，所述硬盘驱动器包括一个磁道内的多个扇区，以及用于伺服控制的突发信号在每个扇区上径向记录。 该方法包括：在径向位置处检测峰值位置，其中记录的脉冲串信号的幅度分别在每个磁道上峰值; 比较每个轨道上所检测到的脉冲串信号的峰值位置; 检测峰值位置误差计数，峰值位置误差计数是其中检测到的峰值位置的偏移超过预定数量的轨道内的偏移极限的轨道数; 并且如果峰值位置误差计数超过偏移极限，则将伺服脉冲信号的写入质量确定为低。 可以检测到以均匀强度记录的伺服脉冲串信号和从正常位置移位记录的伺服脉冲串信号。 因此，可以有效地管理伺服脉冲串信号的质量。