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    • 4. 发明授权
    • GMSK modulation using a dual-port memory
    • GMSK调制使用双端口存储器
    • US07570705B2
    • 2009-08-04
    • US11351376
    • 2006-02-10
    • Young-Sam Kim
    • Young-Sam Kim
    • H04L27/00
    • H04L27/2017
    • A GMSK modulator includes a dual-port memory, an address generator and a signal provider, where the dual-port memory respectively outputs in-phase and quadrature phase waveform data to first and second ports in response to in-phase and quadrature phase waveform address signals, the address generator generates the in-phase and quadrature phase waveform address signals based on a differential encoded bit stream, the signal provider selects one of the in-phase and the quadrature phase waveform data in response to the differential encoded bit stream, and outputs continuous GMSK in-phase and quadrature phase channel signals, and the redundancy of the memory that stores the GMSK in-phase and quadrature phase waveform data may be reduced using the dual-port memory so that the size of the memory may be reduced.
    • GMSK调制器包括双端口存储器,地址发生器和信号提供器,其中双端口存储器响应于同相和正交相位波形地址分别将同相和正交相位波形数据输出到第一和第二端口 信号,地址发生器基于差分编码比特流生成同相和正交相位波形地址信号,信号提供者响应差分编码比特流选择同相和正交相位波形数据之一,以及 输出连续的GMSK同相和正交相位信道信号,并且可以使用双端口存储器来减少存储GMSK同相和正交相位波形数据的存储器的冗余度,从而可以减小存储器的尺寸。
    • 10. 发明授权
    • Apparatus for measuring three-dimensional volumetric errors in multiaxis machine tool
    • 用于测量多轴机床三维体积误差的装置
    • US06269544B1
    • 2001-08-07
    • US09479903
    • 2000-01-10
    • Heui Jae PahkYoung Sam Kim
    • Heui Jae PahkYoung Sam Kim
    • G01C2500
    • G01B21/04
    • An apparatus for measuring three-dimensional volumetric errors in a multiaxis machine tool is disclosed. The apparatus comprises a kinematic ball bar provided with two balls at both ends thereof as a basic construction. A U-shaped bar with two extension arms is integrated with the ball bar. A vertical post is positioned relative to the U-shaped bar and is integrated with one of the two balls. A sleeve is fitted over the post and two guide bars is fixedly and longitudinally assembled with an external surface of the sleeve at opposite positions. Each of the guide bars is provided with a slot at a lower portion thereof for movably receiving an operating pin.
    • 公开了一种用于测量多轴机床中的三维体积误差的装置。 该装置包括在其两端设置有两个球作为基本结构的运动球杆。 具有两个延伸臂的U形杆与球棒一体化。 垂直柱相对于U形杆定位并且与两个球中的一个一体化。 一个套筒安装在柱上,两个导杆与相对位置的套筒的外表面固定地和纵向组装。 每个导杆在其下部设置有用于可移动地接收操作销的槽。