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    DRM/AM simulcast
    11.
    发明申请
    DRM/AM simulcast 有权
    DRM / AM联播

    公开(公告)号：US20030012300A1

    公开(公告)日：2003-01-16

    申请号：US10191190

    申请日：2002-07-09

    Inventor： Jens Wildhagen ,  Dietmar Schill

    IPC: H03C001/52

    CPC classification number: H04H60/07 ,  H03C1/60 ,  H04H20/36 ,  H04H2201/12 ,  H04H2201/20

    Abstract: An AM simulcast broadcast signal combining a digital transmission signal and an analogue transmission signal in one transmission channel. The digital transmission signal is modulated to one sideband of a carrier of the transmission channel and a correcting signal (C) is modulated to the other sideband of the carrier of the transmission channel, which correcting signal (C) is determined so that the envelope demodulation of the transmission channel represents the analogue transmission signal.

    Abstract translation: 在一个传输信道中组合数字传输信号和模拟传输信号的AM同播广播信号。 数字传输信号被调制到传输信道的载波的一个边带，并且校正信号（C）被调制到传输信道的载波的另一个边带，该校正信号（C）被确定为使得包络解调 的传输信道表示模拟传输信号。

    DRM receiver with analog and digital separation filter and demodulation method
    16.
    发明授权
    DRM receiver with analog and digital separation filter and demodulation method 有权
    DRM接收机采用模拟和数字分离滤波器和解调方式

    公开(公告)号：US08208365B2

    公开(公告)日：2012-06-26

    申请号：US12079927

    申请日：2008-03-28

    Applicant: Yan Liu ,  Huazhong Yang

    Inventor： Yan Liu ,  Huazhong Yang

    IPC: H04J11/00

    CPC classification number: H04L27/265 ,  H04H2201/12 ,  H04L27/0008

    Abstract: A Digital Radio Mondiale (DRM) receiver and demodulation method includes an analog and digital separation filter for filtering and separating a DRM-encoded signal and a non DRM-encoded signal from a composite RF signal received at the receiver. The DRM receiver includes a programmable downsampler and a programmable N-point Fast Fourier Transform (FFT) to recover and demodulate the OFDM symbols in a received DRM-encoded RF signal. The received signal is digitally sampled at a rate operably integer downsampled to achieve a number N samples in the useful portion of the OFDM symbol for input to an N-point FFT, where N equal to a power of two. The downsampling rate and size (N-points) of the FFT depend on the DRM encoding and transmission parameters, notably the robustness mode and spectrum occupancy. The structure and operation of the receiver in this manner simplifies the design and reduces the required filter order of the analog and digital separation filter.

    Abstract translation: 数字无线电广播（DRM）接收机和解调方法包括模拟和数字分离滤波器，用于从在接收机处接收的复合RF信号过滤和分离DRM编码信号和非DRM编码信号。 DRM接收机包括可编程下行采样器和可编程N点快速傅里叶变换（FFT），以在接收的DRM编码RF信号中恢复和解调OFDM符号。 接收到的信号以可操作的整数下采样的速率进行数字采样，以在OFDM符号的有用部分中实现N个采样，以输入到N点FFT，其中N等于2的幂。 FFT的下采样率和大小（N点）取决于DRM编码和传输参数，特别是鲁棒性模式和频谱占用。 以这种方式，接收机的结构和操作简化了设计，并减少了模拟和数字分离滤波器所需的滤波器顺序。

    METHOD AND CONTROL UNIT FOR DIRECT SAMPLING OF A PLURALITY OF RADIO BANDS
    17.
    发明申请
    METHOD AND CONTROL UNIT FOR DIRECT SAMPLING OF A PLURALITY OF RADIO BANDS 有权
    用于直接采样无线电广播的方法和控制单元

    公开(公告)号：US20120140859A1

    公开(公告)日：2012-06-07

    申请号：US13376142

    申请日：2010-08-03

    Applicant: Carsten Lehr ,  Detlev Nyenhuis ,  Marcus Risse

    Inventor： Carsten Lehr ,  Detlev Nyenhuis ,  Marcus Risse

    IPC: H04L27/14

    CPC classification number: H04B1/0064 ,  H04H40/27 ,  H04H2201/11 ,  H04H2201/12 ,  H04H2201/20

    Abstract: A method for direct sampling of a plurality of radio bands, including a step of receiving a first radio band via a first interface and at least one additional radio band via at least one additional interface, the first radio band and the at least one additional radio band each being associated with different frequency ranges, and the first radio band or the at least one additional radio band being a DAB band. Furthermore, a selection signal is received via an interface, the selection signal indicating whether further processing of the first radio band and/or the at least one additional radio band takes place. Depending on the selection signal, the first radio band is sampled at a common sampling frequency and/or the at least one additional radio band is sampled at the common sampling frequency.

    Abstract translation: 一种用于直接采样多个无线频带的方法，包括经由第一接口和至少一个附加无线电频带经由至少一个附加接口接收第一无线频带的步骤，所述第一无线电频带和所述至少一个附加无线电 频带各自与不同的频率范围相关联，并且第一无线电频带或至少一个附加无线电频段是DAB频带。 此外，经由接口接收选择信号，所述选择信号指示是否发生第一无线电频带和/或至少一个附加无线电频带的进一步处理。 根据选择信号，以公共采样频率对第一无线电频带进行采样和/或以公共采样频率对至少一个附加无线频带进行采样。

    Radio broadcasting method and transmitter using pre-filtering and corresponding signal
    18.
    发明授权
    Radio broadcasting method and transmitter using pre-filtering and corresponding signal 有权
    无线电广播方式和发射机使用预滤波和相应的信号

    公开(公告)号：US07991075B2

    公开(公告)日：2011-08-02

    申请号：US10558055

    申请日：2004-05-25

    Applicant: Marc Lanoiselee ,  Pierrick Louin

    Inventor： Marc Lanoiselee ,  Pierrick Louin

    IPC: H04H1/00

    CPC classification number: H04H20/46 ,  H04H20/22 ,  H04H2201/12 ,  H04H2201/186 ,  H04L27/2601

    Abstract: The disclosure relates to a radio broadcasting method for a first multicarrier digital signal occupying a first frequency band adjacent to at least one second frequency band, each assigned to a second signal. Pre-filtering is applied to the said first signal before its emission so as to attenuate the power of the said first signal in at least a first portion of the said first frequency band, adjacent to the said second frequency band(s).

    Abstract translation: 本公开涉及占用与至少一个第二频带相邻的第一频带的第一多载波数字信号的无线电广播方法，每个第二频带分配给第二信号。 在其发射之前对所述第一信号进行预滤波，以便在与所述第二频带相邻的所述第一频带的至少第一部分中衰减所述第一信号的功率。

    DEMODULATION METHOD, INFORMATION PROCESS APPARATUS, AND RECEPTION STATION
    20.
    发明申请
    DEMODULATION METHOD, INFORMATION PROCESS APPARATUS, AND RECEPTION STATION 有权

    公开(公告)号：US20170093500A1

    公开(公告)日：2017-03-30

    申请号：US15268863

    申请日：2016-09-19

    Applicant: FUJITSU LIMITED

    Inventor： Taki Kono

    IPC: H04B10/60 ,  H04L5/00

    CPC classification number: H04B10/60 ,  H04B7/02 ,  H04H40/09 ,  H04H60/00 ,  H04H2201/12 ,  H04L5/0048 ,  H04L7/06 ,  H04L27/00

    Abstract: A non-transitory computer-readable recording medium on which a program is recorded for a causing a processor to execute a demodulation process. The demodulation process includes detecting a preamble of a wireless signal transmitted from a first transmission station by way of a short wavelength carrier wave, extracting a first signal superimposed on the short wavelength carrier wave, the first signal being extracted from a wireless signal that is identified in accordance with the detection of the preamble, extracting a second signal superimposed on a carrier wave transmitted from a second transmission station, and performing demodulation on a target demodulation signal obtained by superimposing the first signal on the second signal.

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