Receiver
    97.
    发明申请
    Receiver 审中-公开
    接收器

    公开(公告)号:US20050123079A1

    公开(公告)日:2005-06-09

    申请号:US11000977

    申请日:2004-12-02

    CPC classification number: H03J1/0066

    Abstract: A receiver capable of stabilizing its multipass removal filter and thus ensuring an acceptable reception performance, without being affected by a change in the reception sensitivity or the like. The receiver comprises a front end unit for outputting an intermediate frequency signal by mixing/detecting, in accordance with a local oscillation signal, a high frequency received signal received by a reception antenna, an A/D converter for converting an intermediate frequency signal into a digital intermediate frequency signal and outputting the same, an amplitude adjuster for adjusting the amplitude of the digital intermediate frequency signal to a predetermined value and outputting the same, and a multipass removal filter for removing a multipass distortion of a signal outputted from the amplitude adjuster and then outputting a desired signal. The receiver also includes an amplitude supervisor which operates to supervise a change of the above outputted signal, and changes an adjusting period τ of the amplitude adjuster once the change of the above outputted signal exceeds a predetermined value. The receiver further includes a controller which, during an automatic tuning (selection of broadcasting stations), fixes the tap coefficient of the multipass removal filter.

    Abstract translation: 一种能够稳定其多通道去除滤波器并因此确保可接受的接收性能的接收机,而不受接收灵敏度等的改变的影响。 接收机包括:前端单元,用于通过根据本地振荡信号混合/检测由接收天线接收的高频接收信号来输出中频信号; A / D转换器,用于将中频信号转换为 数字中频信号并输出​​该数字中频信号,用于将数字中频信号的幅度调整到预定值并输出的幅度调节器,以及用于去除从幅度调节器输出的信号的多路失真的多通道去除滤波器,以及 然后输出所需信号。 接收机还包括振幅监视器,其操作以监视上述输出信号的变化,并且一旦上述输出信号的改变超过预定值,则改变幅度调节器的调整周期τ。 接收机还包括控制器,其在自动调谐(选择广播站)期间固定多通道去除滤波器的抽头系数。

    Multipath elimination filter
    98.
    发明申请
    Multipath elimination filter 审中-公开
    多路径消除滤波器

    公开(公告)号:US20050123035A1

    公开(公告)日:2005-06-09

    申请号:US10995392

    申请日:2004-11-24

    Abstract: A multipath elimination filter comprises a digital filter for receiving a digitalized FM modulation signal or phase modulation signal as its input signal, and eliminating multipath distortion from the input signal by adjusting tap factors for the input signal, an envelope detecting section for detecting an envelope of the input signal to generate a reference signal, an error detecting section for generating an error signal by performing a differential operation on a desired signal generated by the digital filter and the reference signal, an error component limiting section for monitoring the error signal for a direct-current component and controlling an amplitude of the error signal to generate a corrected error signal, and a tap factor updating section for adjusting the tap factors based on the corrected error signal so that the amplitude of the error signal approaches zero. This makes the entire system converge toward stabilization to eliminate multipath distortion.

    Abstract translation: 多路径消除滤波器包括数字滤波器,用于接收数字化FM调制信号或相位调制信号作为其输入信号,并且通过调整输入信号的分接因子来消除来自输入信号的多径失真;包络检测部分,用于检测信号 用于产生参考信号的输入信号;误差检测部分,用于通过对由数字滤波器产生的期望信号和参考信号执行差分运算来产生误差信号;误差分量限制部分,用于监视直接的误差信号 并且控制误差信号的幅度以产生校正的误差信号;以及抽头因子更新部分,用于基于校正的误差信号调整抽头因子,使得误差信号的幅度接近零。 这使得整个系统趋向稳定以消除多径失真。

    Digital broadcasting system
    100.
    发明授权
    Digital broadcasting system 失效
    数字广播系统

    公开(公告)号:US06784917B1

    公开(公告)日:2004-08-31

    申请号:US09308229

    申请日:1999-05-20

    Abstract: A digital broadcasting system is obtained having simple facilities and circuit structure and capable of efficiently transmitting and receiving synchronized pictures and displaying them without applying a synchronizing process thereto. According to the digital broadcasting system, picture signals respectively for the light eye and the left eye obtained from two synchronously operated cameras (13a, 13b) are converted to a noninterlace frame signal (picture data) by a frame memory unit (20) of the transmitting end. The picture data is compressed and modulated, and then transmitted to a communication satellite (8) over a transmission line of one channel. A transmission signal supplied from the communication satellite (8) is demodulated and decoded, and then converted to picture signals for the right and left eyes by a frame memory unit (21) of the receiving end, and the converted signals are displayed on a stereoscopic display monitor (12) in a stereoscopic manner.

    Abstract translation: 获得具有简单的设备和电路结构的数字广播系统,并且能够有效地发送和接收同步图像并显示它们而不对其进行同步处理。根据数字广播系统,分别获得用于眼睛和左眼的图像信号 来自两个同步操作的照相机(13a,13b)被发送端的帧存储器单元(20)转换成非隔行帧信号(图像数据)。 图像数据被压缩和调制,然后通过一个通道的传输线传输到通信卫星(8)。 从通信卫星(8)提供的发送信号被解调和解码,然后由接收端的帧存储器单元(21)转换成用于右眼和左眼的图像信号,并且转换的信号以立体显示 显示监视器(12)。

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