Diversity receiver, and method for receiving orthogonal frequency division multiplex signal
    8.
    发明授权
    Diversity receiver, and method for receiving orthogonal frequency division multiplex signal 失效
    分集接收机,以及接收正交频分复用信号的方法

    公开(公告)号:US07801018B2

    公开(公告)日:2010-09-21

    申请号:US10450111

    申请日:2001-12-07

    摘要: A diversity receiver capable of stably receiving an orthogonal frequency division multiplex signal, wherein a demodulator is so operated that the attenuation of the received signal is varied step by step every time a period corresponding to a guard interval section comes if it is determined that the reception level is increased by switching the attenuation in any one of variable attenuators, and the demodulator is so operated that the variable attenuator designated by an antenna control pointer is changed and the attenuation is varied if it is determined that the variable attenuator designated by an antenna control pointer is identical with the variable attenuator designated by an antenna fixing pointer.

    摘要翻译: 一种能够稳定地接收正交频分多路复用信号的分集接收机,其中解调器如此操作,使得如果确定接收到的接收信号,则每当对应于保护间隔部分的时间段时,接收信号的衰减逐步改变 通过切换任一个可变衰减器中的衰减来增加电平,并且解调器如此操作,使得由天线控制指针指定的可变衰减器改变,并且如果确定由天线控制器指定的可变衰减器,则衰减变化 指针与由天线固定指针指定的可变衰减器相同。

    Apparatus for demodulating AM data multiplexed modulated wave signal
    9.
    发明授权
    Apparatus for demodulating AM data multiplexed modulated wave signal 失效
    用于解调AM数据多路复用调制波信号的装置

    公开(公告)号:US5970046A

    公开(公告)日:1999-10-19

    申请号:US889575

    申请日:1997-07-08

    IPC分类号: H04B1/04 H04B1/30 H04J11/00

    CPC分类号: H04B1/04 H04B1/30

    摘要: An apparatus for demodulating an AM data multiplexed modulated wave signal in which an analog modulated signal and digital modulated signals are multiplexed, in order to derive therefrom a baseband digital signal. The demodulation apparatus aims to derive the digital baseband signal from the AM data multiplexed modulated wave signal in which the analog modulated signal obtained by amplitude modulating a carrier having a frequency fc with an analog signal and the digital modulated signals at frequency position of (fc+f.alpha.) and (fc-f.alpha.) line-symmetrical with respect to a frequency axis of the frequency fc are multiplexed. A demodulation apparatus includes an AM type modulated wave signal eliminating circuit for removing an AM modulated wave signal from an input AM data multiplexed modulated wave signal, and a data demodulation circuit for receiving an output of the AM type modulated wave signal eliminating circuit and for deriving therefrom a baseband digital signal.

    摘要翻译: 一种用于解调其中模拟调制信号和数字调制信号被多路复用的AM数据复用调制波信号的装置,以便从中得到基带数字信号。 解调装置旨在从AM数据复用调制波信号导出数字基带信号,其中通过对具有模拟信号的频率fc的载波进行幅度调制而获得的模拟调制信号和频率位置处的(fc + fα)和(fc-fα)相对于频率fc的频率轴线对称的多路复用。 解调装置包括:AM型调制波信号消除电路,用于从输入的AM数据复用调制波信号中去除AM调制波信号;以及数据解调电路,用于接收AM型调制波信号消除电路的输出, 从而提供基带数字信号。

    Sheet stacking tray, sheet stacking apparatus, and image forming system

    公开(公告)号:US11498795B2

    公开(公告)日:2022-11-15

    申请号:US17396937

    申请日:2021-08-09

    摘要: A sheet stacking tray includes a first conveyor, a second conveyor, a sheet stopper, a first full-load detector, a second full-load detector, and a plurality of motors. The plurality of motors maintain the sheet stopper at a protruding position to block a sheet conveyed by the first conveyor until the first full-load detector outputs a signal indicating that a sheet bundle is fully loaded, shift the sheet stopper to a lowered position to allow the sheet bundle to pass when the first full-load detector outputs the signal indicating that the sheet bundle is fully loaded, drive the first conveyor and the second conveyor together to convey the sheet bundle when the sheet stopper shifts to the lowered position, and stop the second conveyor and drive only the first conveyor, when the second full-load detector detects a leading edge of the sheet bundle.