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    Multiplex of high definition radio stations
    1.
    发明授权
    Multiplex of high definition radio stations 有权

    公开(公告)号：US10469301B2

    公开(公告)日：2019-11-05

    申请号：US15565329

    申请日：2016-04-08

    Applicant: Nautel Limited

    Inventor： Philipp Schmid ,  Brian Walker

    IPC: H04L27/26 ,  H04H20/00

    Abstract: 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.

    PEAK-TO-AVERAGE POWER REDUCTION METHOD
    3.
    发明申请
    PEAK-TO-AVERAGE POWER REDUCTION METHOD 审中-公开
    峰值平均功率降低方法

    公开(公告)号：US20130215946A1

    公开(公告)日：2013-08-22

    申请号：US13758988

    申请日：2013-02-04

    Applicant: NAUTEL LIMITED

    Inventor： Brian Walker ,  Philipp Schmid

    IPC: H04L27/26

    CPC classification number: H04L27/2614 ,  H04B1/0475 ,  H04B2001/0416 ,  H04L27/2623

    Abstract: A method of reducing peak-to-average power in a hybrid signal is provided. The method determines peaks in power by defining a sample point by way of a digital vector and an analog vector. The digital and analog vectors are added together to generate a hybrid vector which is used to compare the sample point to the maximum desired peak threshold. An error vector is used to correct the sample point to a desired power level. Once the sample point has been corrected it can be added back to the analog signal and transmitted.

    Abstract translation: 提供了一种降低混合信号中的峰均功率的方法。 该方法通过数字矢量和模拟矢量定义采样点来确定功率峰值。 将数字和模拟向量相加在一起以产生用于将采样点与最大期望峰值阈值进行比较的混合矢量。 使用误差向量将采样点校正到所需的功率水平。 一旦采样点被校正，可以将其加回到模拟信号并传输。

    MULTIPLEX OF HIGH DEFINITION RADIO STATIONS
    5.
    发明申请
    MULTIPLEX OF HIGH DEFINITION RADIO STATIONS 审中-公开

    公开(公告)号：US20180123853A1

    公开(公告)日：2018-05-03

    申请号：US15565329

    申请日：2016-04-08

    Applicant: Nautel Limited

    Inventor： Philipp Schmid ,  Brian Walker

    IPC: H04L27/26 ,  H04H20/00

    CPC classification number: H04L27/2621 ,  H04H20/00 ,  H04H2201/12 ,  H04H2201/183 ,  H04L27/2623 ,  H04L27/2624

    Abstract: 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.

    PEAK-TO-AVERAGE POWER REDUCTION METHOD
    6.
    发明申请
    PEAK-TO-AVERAGE POWER REDUCTION METHOD 审中-公开
    峰值平均功率降低方法

    公开(公告)号：US20140185696A1

    公开(公告)日：2014-07-03

    申请号：US14199013

    申请日：2014-03-06

    Applicant: Nautel Limited

    Inventor： Brian Walker ,  Philipp Schmid

    IPC: H04L27/26

    CPC classification number: H04L27/2614 ,  H04B1/0475 ,  H04B2001/0416 ,  H04L27/2623

    Abstract: A method of reducing peak-to-average power in a hybrid signal is provided. The method determines peaks in power by defining a sample point by way of a digital vector and an analog vector. The digital and analog vectors are added together to generate a hybrid vector which is used to compare the sample point to the maximum desired peak threshold. An error vector is used to correct the sample point to a desired power level. Once the sample point has been corrected it can be added back to the analog signal and transmitted.

    Abstract translation: 提供了一种降低混合信号中的峰均功率的方法。 该方法通过数字矢量和模拟矢量定义采样点来确定功率峰值。 将数字和模拟向量相加在一起以产生用于将采样点与最大期望峰值阈值进行比较的混合矢量。 使用误差向量将采样点校正到所需的功率水平。 一旦采样点被校正，可以将其加回到模拟信号并传输。

    SYSTEMS AND METHOD FOR CONSISTENT FM/HD1 DIVERSITY DELAY
    8.
    发明申请
    SYSTEMS AND METHOD FOR CONSISTENT FM/HD1 DIVERSITY DELAY 有权

    公开(公告)号：US20230046981A1

    公开(公告)日：2023-02-16

    申请号：US17887993

    申请日：2022-08-15

    Applicant: Nautel Limited

    Inventor： Philipp Schmid

    IPC: H04H20/30 ,  G10L19/24 ,  G10L19/16 ,  H04H20/71

    Abstract: A broadcast system may have less restrictive timing constraints by providing synchronous processing chains for the HD audio portion and the FM audio portion so that no samples are added or removed from when the input audio is first sampled at an input rate and when the signals are combined and output by a digital analog converter operating at an output rate. The signals can be buffered within the synchronous processing paths and the state of the buffer can be used to control the input rate of the sampler. Graceful change over across multiple input sources can be achieved provided all input source input rates are controlled to by the overall output rate and all input sources are phase aligned to produce output symbols at the same time.

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