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    MULTIPLEX OF HIGH DEFINITION RADIO STATIONS
    2.
    发明公开
    MULTIPLEX OF HIGH DEFINITION RADIO STATIONS 审中-公开
    高清晰度无线电台的多路复用

    公开(公告)号：EP3281316A1

    公开(公告)日：2018-02-14

    申请号：EP16775985.1

    申请日：2016-04-08

    申请人： Nautel Limited

    发明人： SCHMID, Philipp ,  WALKER, Brian

    IPC分类号： H04H20/95 ,  H04H20/30 ,  H04H20/46 ,  H04H60/27 ,  H04J11/00

    CPC分类号： H04L27/2621 ,  H04H20/00 ,  H04H2201/12 ,  H04H2201/183 ,  H04L27/2623 ,  H04L27/2624

    摘要： A system for peak-to-average-power ratio (PAPR) reduction of a frequency shifted plurality of digital broadcast signals taking into account the combined signal peaks in order to transmit the signals more efficiently in a single broadcast transmission system. The PAPR algorithm takes into account a rotating constellation phase offset for the shifted signals corresponding to the amount of applied frequency shift. In the case of a dual sideband In-Band-On-Channel (IBOC) signal typically used in conjunction with an FM carrier in the center, the sidebands can be interleaved to create a new IBOC signal definition and take the place of the FM carrier for an all-digital transmission that is backward compatible with IBOC receivers allowing for a gradual migration to all digital broadcasting.

    Impedance measurement in an active radio frequency transmitter
    6.
    发明公开
    Impedance measurement in an active radio frequency transmitter 审中-公开
    在射频发射机有源阻抗测量

    公开(公告)号：EP2109224A3

    公开(公告)日：2014-03-12

    申请号：EP09157880.7

    申请日：2009-04-14

    申请人： Nautel Limited

    发明人： Walker, Brian

    IPC分类号： H04B1/04

    CPC分类号： H04B1/0458 ,  H04B17/10

    摘要： A transmitter and method for determining impedance measurement in an active radio frequency transmitter of an antenna is provided. Voltage (100) and current (101) samples are obtained from a modulating signal delivered to an antenna. The voltage and current samples are converted from analog to digital format (102,103) and decimation occurs to reduce the number of samples. Complex demodulation (104,105) is performed of each of the voltage and current samples to baseband levels and decimation (106,107) of the voltage and current samples is performed to reduce the number of samples. An impedance estimate can then be estimated from the voltage and current samples.

    Impedance measurement in an active radio frequency transmitter
    9.
    发明公开
    Impedance measurement in an active radio frequency transmitter 审中-公开
    在einem aktiven Radiofrequenzsender的Impedanzmessung

    公开(公告)号：EP2109224A2

    公开(公告)日：2009-10-14

    申请号：EP09157880.7

    申请日：2009-04-14

    申请人： Nautel Limited

    发明人： Walker, Brian

    IPC分类号： H04B1/04

    CPC分类号： H04B1/0458 ,  H04B17/10

    摘要： A transmitter and method for determining impedance measurement in an active radio frequency transmitter of an antenna is provided. Voltage and current samples are obtained from a modulating signal delivered to an antenna. The voltage and current samples are converted from analog to digital format and decimation occurs to reduce the number of samples. Complex demodulation is performed of each of the voltage and current samples to baseband levels and decimation of the voltage and current samples is performed to reduce the number of samples. An impedance estimate can then be estimated from the voltage and current samples.

    摘要翻译： 提供了一种用于确定天线的有源射频发射机中的阻抗测量的发射机和方法。 电压（100）和电流（101）采样从传送到天线的调制信号获得。 电压和电流采样从模数转换为数字格式（102,103），并进行抽取以减少采样数。 执行电压和电流样本中的每一个到基带电平的复杂解调（104,105），并执行电压和电流样本的抽取（106,107）以减少样本数量。 然后可以从电压和电流样本估计阻抗估计值。