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    • 8. 发明申请
    • Wireless system
    • 无线系统
    • US20080020711A1
    • 2008-01-24
    • US11826609
    • 2007-07-17
    • Akira ItoMasahiko Shimizu
    • Akira ItoMasahiko Shimizu
    • H04B17/00
    • H04L1/0026H04L1/20
    • A wireless system in which a pilot signal is transmitted in such a manner as to restrain error between the SIR of a data channel and that of the pilot signal, thereby improving wireless transmission quality. A specific pilot signal generator generates a specific pilot signal whose power and spreading ratio are identical with those of the data channel. A data channel generator receives propagation environment information and generates the data channel with a transmission format corresponding to the received propagation environment information. A wireless transmitter transmits the specific pilot signal and the data channel. On detecting the specific pilot signal, a propagation environment information notifier measures the SIR of the specific pilot signal, then generates propagation environment information corresponding to the measured SIR, and notifies the wireless transmitting unit of the generated information. A data channel receiver receives the data channel and processes the received data channel.
    • 其中以抑制数据信道的SIR与导频信号的SIR之间的误差的方式发送导频信号的无线系统,从而提高无线传输质量。 特定的导频信号发生器产生其功率和扩展率与数据信道的功率和扩频比相同的特定导频信号。 数据信道生成器接收传播环境信息,并以与所接收的传播环境信息对应的传输格式生成数据信道。 无线发射机发送特定的导频信号和数据信道。 在检测到特定导频信号时,传播环境信息通知器测量特定导频信号的SIR,然后产生与所测量的SIR相对应的传播环境信息,并向无线发射单元通知所生成的信息。 数据信道接收机接收数据信道并处理接收到的数据信道。
    • 10. 发明授权
    • Disk device
    • 磁盘设备
    • US06597646B1
    • 2003-07-22
    • US09646934
    • 2000-11-30
    • Masahiko ShimizuYorio Takahashi
    • Masahiko ShimizuYorio Takahashi
    • G11B700
    • G11B19/28G11B7/0941
    • A disk device for controlling the revolution of a disk, and the operation of a focus coil and a tracking coil with high precision even during the low-velocity revolution of a disk is provided. A control signal gain switch circuit (12) is provided as control signal gain switch means for switching depending on an operation state and outputting a gain of at least one of a spindle motor control signal (10) output to a spindle motor control circuit (3) as the first control unit for controlling a spindle motor (2) which revolves the disk (1), and a focus tracking control signal (11) output to the focus tracking control circuit (4) as the second control unit for controlling an optical pickup (5) which reads information in the disk (1) and outputs a high frequency signal.
    • 提供了一种用于控制盘的旋转的盘装置,以及即使在盘的低速旋转期间也具有高精度的聚焦线圈和跟踪线圈的操作。 控制信号增益开关电路(12)被提供作为控制信号增益开关装置,用于根据操作状态进行切换,并输出主轴电动机控制信号(10)中的至少一个的增益,该主轴电动机控制信号(10)输出到主轴电动机控制电路 )作为用于控制旋转盘(1)的主轴电机(2)的第一控制单元和作为第二控制单元输出到聚焦跟踪控制电路(4)的聚焦跟踪控制信号(11),用于控制光 拾取(5),其读取盘(1)中的信息并输出高频信号。