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1. 发明授权

US07170950B2 DRM/AM simulcast 有权
标题翻译： DRM / AM联播
公开(公告)号：US07170950B2
公开(公告)日：2007-01-30
申请号：US10191190
申请日：2002-07-09
申请人： Jens Wildhagen , Dietmar Schill
发明人： Jens Wildhagen , Dietmar Schill
IPC分类号： H03C1/52
CPC分类号： H04H60/07 , H03C1/60 , H04H20/36 , H04H2201/12 , H04H2201/20
摘要： 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.
摘要翻译：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。

2. 发明申请

US20070223627A1 JOINT DRM AM SIMULCAST ENCODER AND TRANSMITTER EQUALIZER 审中-公开
标题翻译： JOINT DRM AM SIMULCAST编码器和发射机均衡器
公开(公告)号：US20070223627A1
公开(公告)日：2007-09-27
申请号：US11681468
申请日：2007-03-02
申请人： Jens Wildhagen , Dietmar Schill
发明人： Jens Wildhagen , Dietmar Schill
IPC分类号： H04L27/06 , H04B1/10
CPC分类号： H03C1/60 , H03D7/16
摘要： The present invention relates to a signal estimation apparatus, a signal deviation estimation apparatus, a signal pre-transmission preparation apparatus and a simulcast broadcasting system as well as corresponding methods and a corresponding computer program product. In particular, the present invention relates to the above, wherein a predetermined non-linearity, e.g. for modelling a transmission of a broadcast signal, is applied to a signal so as to obtain an estimation signal e.g. of a transmitted broadcast signal.
摘要翻译：本发明涉及信号估计装置，信号偏差估计装置，信号预传输准备装置和联播广播系统以及相应的方法和相应的计算机程序产品。特别地，本发明涉及上述，其中预定的非线性，例如，用于对广播信号的传输进行建模的模拟信号被施加到信号，以便获得估计信号。的发送广播信号。

3. 发明授权

US07515921B2 Peak reduction for simulcast broadcast signals 失效
标题翻译：联播广播信号的峰值降低
公开(公告)号：US07515921B2
公开(公告)日：2009-04-07
申请号：US10434800
申请日：2003-05-09
申请人： Jens Wildhagen , Dietmar Schill
发明人： Jens Wildhagen , Dietmar Schill
IPC分类号： H04B15/00
CPC分类号： H04H20/22 , H04H2201/12 , H04H2201/20 , H04L5/06
摘要： A reduced peak simulcast signal generator and a method for generating a stable peak-attenuated simulcast signal, which combines a digital broadcast signal and an analogue broadcast signal, are described. The simulcast signal generator comprises at least one attenuation stage for attenuating the digital and/or the analogue broadcast signal in order to obtain a stable simulcast signal. Each attenuation stage comprises a simulcast signal generator for generating an error signal, and attenuation means which attenuate, in dependence of said first error signal, at least one of the analogue and the digital broadcast signal.
摘要翻译：描述了降低峰值联播信号发生器和用于产生组合数字广播信号和模拟广播信号的稳定峰值衰减联播信号的方法。联播信号发生器包括用于衰减数字和/或模拟广播信号的至少一个衰减级，以便获得稳定的联播信号。每个衰减级包括用于产生误差信号的同播信号发生器，以及根据所述第一误差信号衰减模拟和数字广播信号中的至少一个的衰减装置。

4. 发明授权

US07433476B2 Automatic gain control 失效
标题翻译：自动增益控制
公开(公告)号：US07433476B2
公开(公告)日：2008-10-07
申请号：US10253323
申请日：2002-09-24
申请人： Jens Wildhagen , Carsten Merkle , Dietmar Schill , Rolf Nöthlings , Taiwa Okanobu
发明人： Jens Wildhagen , Carsten Merkle , Dietmar Schill , Rolf Nöthlings , Taiwa Okanobu
IPC分类号： H03G3/00
CPC分类号： H03G3/001 , H03G3/3036 , H03M1/185
摘要： In an automatic gain control unit, the gain of a voltage-controlled amplifier (VCA) (25) is regulated with a closed-loop control circuit. The time constant of the control circuit is varied dependent on the magnitude (31) of the VCA output signal. As long as the magnitude (31) of the VCA output signal is small, the gain is slowly adjusted. In case the magnitude (31) of the VCA becomes so large that saturation of the analog-digital converter (28) might occur, the time constant of the control circuit is decreased, in order to allow for a quick adjustment of the amplifier's gain.
摘要翻译：在自动增益控制单元中，通过闭环控制电路调节压控放大器（VCA）（25）的增益。控制电路的时间常数取决于VCA输出信号的幅度（31）而变化。只要VCA输出信号的幅度（31）小，增益缓慢调整。在VCA的幅度（31）变得如此大以致可能发生模拟数字转换器（28）的饱和的情况下，控制电路的时间常数减小，以便能够快速调节放大器的增益。

5. 发明授权

US07295631B2 Stereo demultiplexer 失效
标题翻译：立体声解复用器
公开(公告)号：US07295631B2
公开(公告)日：2007-11-13
申请号：US10143057
申请日：2002-05-10
申请人： Jens Wildhagen
发明人： Jens Wildhagen
IPC分类号： H03K9/00
CPC分类号： H04B1/1661 , H04B1/1676 , H04H20/34 , H04H40/45 , Y02D70/40
摘要： A stereo demultiplexer is proposed which can be calculation power efficiently implemented in a DSP. Modern digital FM receivers exploit the information content in the in quadrature component of the modulated difference signal for a noise reduction. The proposed stereo demultiplexer derives the in phase component and the in quadrature component of the difference signal with a minimized number of sinus and cosinus calculations by first downconverting the modulated difference signal to a not synchronized complex baseband signal on basis of a fixed frequency, thereafter a complex sampling rate decimation unit sampling rate decimates the not synchronized complex baseband signal with a factor N and a second complex mixer synchronizes and coherent demodulates the sampling rate decimated not synchronized baseband signal on basis of a first complex carrier signal derived on basis of the pilot carrier signal and the fixed frequency. The proposed stereo demultiplexer can easily be combined with a noise reduction system and the digital demodulation of the RDS and ARI signals.
摘要翻译：提出了一种可以在DSP中有效实现计算能力的立体声解复用器。现代数字FM接收机利用调制差分信号的正交分量中的信息内容进行降噪。所提出的立体声解复用器通过基于固定频率首先将调制的差分信号下变频到不同步的复基带信号，以最小数量的窦道和余弦计算得出差分信号的同相分量和正交分量，之后复数采样率抽取单元采样率用因子N抽取不同步的复基带信号，第二复合混频器基于基于导频载波导出的第一复载波信号来同步和相干解调采样率抽取非同步基带信号信号和固定频率。所提出的立体声解复用器可以容易地与降噪系统和RDS和ARI信号的数字解调组合。

6. 发明申请

US20060274717A1 Alternative frequency strategy for DRM 审中-公开
公开(公告)号：US20060274717A1
公开(公告)日：2006-12-07
申请号：US11484628
申请日：2006-07-12
申请人： Carsten Merkle , Jens Wildhagen , Markus Zumkeller
发明人： Carsten Merkle , Jens Wildhagen , Markus Zumkeller
IPC分类号： H04J3/24
CPC分类号： H04H20/22 , H04H20/26 , H04H20/95 , H04H40/18 , H04H60/27
摘要： A radio transmission signal consisting of signal frames that comprise a dynamic data part and a quasi-static data part according to the present invention is characterized in that the dynamic data part of a respective frame contains an indicator showing in which following frame the quasi-static data part of this respective frame will be repeated. Therewith, an alternative frequency of e.g. a digital shortwave signal like a DRM signal can easily and satisfactorily be checked before a fast seamless switching to this alternative frequency can be performed. The inventive method to perform a seamless switching of a receiver from a first currently tuned frequency to a second alternative frequency is characterized by the step of receiving at least one set of samples from a respective signal transmitted on at least one second frequency during a time period during which said indicator assures that it is secure that only data that has been transmitted at least once is transmitted as signal on said first frequency to gather some information about said alternative frequency.

7. 发明授权

US07092460B1 Digital stereo demultiplexer 失效
标题翻译：数字立体声解复用器
公开(公告)号：US07092460B1
公开(公告)日：2006-08-15
申请号：US09691711
申请日：2000-10-18
申请人： Jens Wildhagen
发明人： Jens Wildhagen
IPC分类号： H03D3/22
CPC分类号： H04B1/1646
摘要： In a stereo demultiplexer receiving a frequency demodulated stereo-multiplex signal (m(t)) which comprises at least a stereo-difference signal (md(t)), a stereo-sum signal (ms(t)) and a pilot carrier, a PLL-circuit (4) to recover the pilot carrier and/or at least one harmonic thereof receives the sampling rate decimated stereo-sum signal (ms(t)) as input signal, which is sampling rate decimated by a decimation factor of D. Therefore, the sampling rate decimation filter in the sum path is used for the sampling rate decimation to generate the 2nd harmonic or any other harmonic of the pilot carrier. This sampling rate decimation filter is available anyway and therefore the sampling rate decimation of the pilot carrier can be performed without an additional filter.
摘要翻译：在立体声解复用器中，接收包括至少立体声差分信号（m（t））的频率解调立体声多路复用信号（m（t）），立体声和信号（m < （t））和导频载波，用于恢复导频载波和/或其至少一个谐波的PLL电路（4）接收采样率抽取立体声和信号（m SUB） s（t））作为输入信号，其是抽取因子D抽取的采样率。因此，求和路径中的采样率抽取滤波器用于采样率抽取以产生2 < 谐波或导频载波的任何其他谐波。该采样率抽取滤波器可用，因此导频载波的采样率抽取可以在没有附加滤波器的情况下执行。

8. 发明授权

US07076222B2 Digital controlled AGC 失效
标题翻译：数字控制AGC
公开(公告)号：US07076222B2
公开(公告)日：2006-07-11
申请号：US10299406
申请日：2002-11-19
申请人： Jens Wildhagen
发明人： Jens Wildhagen
IPC分类号： H04B1/06
CPC分类号： H03G3/001 , H03G3/3036 , H03G3/3052
摘要： An automatic gain control loop for a radio receiver, comprising a switchable lowpass filter (21) to reduce distortions in an analogue gain control signal (6) by switching said switchable lowpass filter (21) to a low time constant in case a change of a gain control signal (6) of the automatic gain control loop lies above a predetermined threshold, which low time constant is lower than a normally used time constant, comprises a hold unit (24) which affects that said switchable lowpass filter (21) uses said low time constant a predetermined time after a change of the gain control signal (6) of the automatic gain control loop lies below said predetermined threshold.
摘要翻译：一种用于无线电接收机的自动增益控制回路，包括可切换低通滤波器（21），用于通过在所述低通滤波器（6）的改变时将所述可切换低通滤波器（21）切换到低时间常数来减少模拟增益控制信号（6）中的失真所述自动增益控制环路的增益控制信号（6）位于预定阈值之上，所述预定阈值低于常用时间常数，所述预定阈值包括保持单元（24），所述保持单元影响所述可切换低通滤波器（21）使用所述在自动增益控制环路的增益控制信号（6）的改变之后的预定时间内的低时间常数低于所述预定阈值。

9. 发明授权

US6075410A Method and device for digitally demodulating a frequency modulated signal 失效
标题翻译：用于数字解调频调制信号的方法和装置
公开(公告)号：US6075410A
公开(公告)日：2000-06-13
申请号：US259230
申请日：1999-03-01
申请人： Jens Wildhagen
发明人： Jens Wildhagen
IPC分类号： H03D3/00 , G01Q80/00 , H04B1/26 , H04H20/88 , H04L27/233 , H04L27/14
CPC分类号： H04L27/2332
摘要： A method and device for digitally demodulating a frequency modulated signal includes: calculating a phase of a digital complex baseband signal of a received frequency modulated signal, calculating an unwrapped phase of the calculated phase, detecting and eliminating 2.pi. phase jumps in the unwrapped phase to generate a corrected phase, and differentiating the corrected phase.
摘要翻译：用于对频率调制信号进行数字解调的方法和装置包括：计算接收频率调制信号的数字复基带信号的相位，计算所计算的相位的展开相位，检测和消除展开相位中的2π相位跳变到生成校正相位，并且校正相位。

10. 发明授权

US07697910B2 Method for separating a RDS signal component and signal receiver 失效
标题翻译：用于分离RDS信号分量和信号接收机的方法
公开(公告)号：US07697910B2
公开(公告)日：2010-04-13
申请号：US10741187
申请日：2003-12-19
申请人： Jens Wildhagen
发明人： Jens Wildhagen
IPC分类号： H04B1/16
CPC分类号： H04H40/63 , H03D1/2254 , H04H2201/13
摘要： A signal receiver and a method for separating a RDS signal component from a received signal is described. After the received signal has been downconverted to the baseband, the baseband signal is split up into a first baseband signal for a first signal path and a second baseband signal for a second signal path. The first baseband signal is highpass filtered and forwarded to a frequency synchronization unit that generates a frequency synchronization carrier. The second baseband signal is modified in accordance with the frequency synchronization carrier provided by the first signal path, and a synchronized baseband signal is obtained that still comprises the full range of the RDS signal's spectral components.
摘要翻译：描述信号接收机和用于从接收信号中分离RDS信号分量的方法。在接收到的信号已经下变频到基带之后，基带信号被分成用于第一信号路径的第一基带信号和用于第二信号路径的第二基带信号。第一基带信号被高通滤波并转发到产生频率同步载波的频率同步单元。根据由第一信号路径提供的频率同步载波来修改第二基带信号，并且获得仍然包括RDS信号的全部范围的频谱分量的同步基带信号。

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