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87 条记录 (耗时 0.013 秒)

    METHOD AND APPARATUS FOR TRANSMISSION PATH DELAY MEASUREMENTS USING ADAPTIVE DEMODULATION
    61.
    发明公开
    METHOD AND APPARATUS FOR TRANSMISSION PATH DELAY MEASUREMENTS USING ADAPTIVE DEMODULATION 失效
    方法和装置用于转移WEGVERZÖGERUNGSMESSUNGENBY自适应解调。

    公开(公告)号：EP0664938A1

    公开(公告)日：1995-08-02

    申请号：EP94907265.0

    申请日：1994-01-18

    申请人： MOTOROLA, INC.

    发明人： CHRISTIAN, Paul, R. ,  KARCZEWSKI, Casimier

    IPC分类号： H04B7 ,  H04H20 ,  H04L7 ,  H04Q7

    CPC分类号： H04H20/67 ,  H04J3/0682 ,  H04L7/046 ,  H04L2007/047

    摘要： A simulacast transmission system (100) utilizes adaptive demodulation to provide a method and apparatus for automatic delay equalization measurements. The simulcast transmission (100) comprises a control station (101) and a plurality of remote stations (201, 301) capable of re-transmitting a received delay equalization measurement signal which includes at least a correction bit pattern signal followed by a synchronization pattern signal. A receiver receives the re-transmitted delay signal, correlates the received signal to obtain a coarse time of reception and analyzes the received correction bit pattern signal to obtain a fine reception time correction factor.

    Data receiver adapted to receive a modulated signal and method of operating such a data receiver
    65.
    发明公开
    Data receiver adapted to receive a modulated signal and method of operating such a data receiver 失效
    用于接收调制信号，并且这种数据的接收器的操作方法的数据接收器。

    公开(公告)号：EP0026597A1

    公开(公告)日：1981-04-08

    申请号：EP80303193.9

    申请日：1980-09-11

    申请人： Western Electric Company, Incorporated

    发明人： Ho, Edmond Yu-Shang

    IPC分类号： H04L25/03 ,  H04B3/14

    CPC分类号： H04L27/01 ,  H04L7/007 ,  H04L7/046 ,  H04L2007/047

    摘要： In a multipoint data communication system a master modem and a plurality of tributary modems are interconnected via respective transmission channels Adaptive equalizer circuitry (55, 56) in the master modem equalizes the channel from a particular tributary by multiplying samples of signals received from the tributary by an ensemble of tap coefficients associated with the tributary and stored in a memory (91). Timing-acquisition circuitry (29) adjusts the phase of the master's sampling circuitry (23, 27) at the start of transmission from a given tributary The master samples and equalizes the received timing acquisition signal to form a succession of timing acquisition equalizer outputs. The timing acquisition signal is illustratively a double-dotting pattern having a four-symbol-interval period which is integrally related to the carrier frequency This allows the samples needed in order to begin forming the timing acquisition equalizer outputs to be generated by replicating the samples taken over only four symbol intervals.

    SIGNAL PROPAGATION SYSTEM AND METHOD OF REDUCING ELECTROMAGNETIC RADIATION EMISSIONS CAUSED BY COMMUNICATION OF TIMING INFORMATION
    69.
    发明公开
    SIGNAL PROPAGATION SYSTEM AND METHOD OF REDUCING ELECTROMAGNETIC RADIATION EMISSIONS CAUSED BY COMMUNICATION OF TIMING INFORMATION 有权
    信号传输系统和方法可以减少电磁辐射的排放量通信调度信息

    公开(公告)号：EP2727267A1

    公开(公告)日：2014-05-07

    申请号：EP12733082.7

    申请日：2012-07-02

    申请人： TomTom International B.V.

    发明人： VAN DEN ELZEN, Jan Johannes Maria

    IPC分类号： H04B15/02 ,  H04L7/00

    CPC分类号： H04B15/02 ,  H04B2215/064 ,  H04L7/0008 ,  H04L7/0012 ,  H04L7/033 ,  H04L2007/047

    摘要： A signal propagation system for communicating timing information comprises a processing resource (300) arranged to generate a first timing signal for communicating the timing information, the first timing signal having a first frequency spectrum associated therewith. An electronic circuit (110) is provided having an input for receiving the timing information. An electrical connection (310) between the processing resource (300) and the electronic circuit (110) is also provided. A signal transformation module (304) for communicating the timing information, and the signal transformation module (304) is arranged to translate the first timing signal into a second timing signal for communicating the timing information. The second timing signal has a second frequency spectrum associated therewith that comprises fewer harmonics than the first timing signal, thereby reducing electromagnetic energy emitted by the electrical connection.