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1. 发明授权

US5197061A Device for the transmission of digital data with at least two levels of protection and corresponding reception device 失效
标题翻译：用于传输数字数据的设备，具有至少两级保护和对应接收设备
公开(公告)号：US5197061A
公开(公告)日：1993-03-23
申请号：US671483
申请日：1991-03-19
申请人： Roselyne Halbert-Lassalle , Jean-Francois Helard , Bernard Le Floch
发明人： Roselyne Halbert-Lassalle , Jean-Francois Helard , Bernard Le Floch
IPC分类号： H04L1/00 , H04L27/26
CPC分类号： H04L1/0068 , H04L1/0003 , H04L1/0009 , H04L1/0017 , H04L1/0025 , H04L1/004 , H04L1/007 , H04L1/0071 , H04L27/2604 , H04L2001/0098
摘要： A device for the transmission of digital data with at least two levels of protection, of the type providing for the distribution of the data to be transmitted in the form of digital elements in the time-frequency space and the transmission of symbols each formed by a multiplex of N orthogonal carriers modulated by a set of the digital elements, and transmitted simultaneously, the device including channel encoding means comprising at least two types of modulation and/or at least two encoding efficiency levels. This enables to optimize the use of the transmission channel by assigning differentiated transmission techniques to portions of data of a same digital train as a function of the different levels of protection sought, against transmission errors.
摘要翻译：用于传输具有至少两个级别的保护的数字数据的装置，提供以时间 - 频率空间中的数字元素形式发送的数据的分发，以及由由一组数字元素调制的N个正交载波的多路复用并且同时发送，所述设备包括信道编码装置，其包括至少两种类型的调制和/或至少两个编码效率水平。这使得能够通过针对传输错误将差分传输技术分配给与所寻求的不同级别的保护级别相同的数字列的数据的部分来优化传输信道的使用。

2. 发明授权

US5274629A Method for the broadcasting of digital data, notably for radio broadcasting at high bit rate towards mobile receivers, with time-frequency interlacing and coherent demodulation 失效
标题翻译：用于广播数字数据的方法，特别是针对移动接收机的高比特率的无线电广播，具有时频隔行扫描和相干解调
公开(公告)号：US5274629A
公开(公告)日：1993-12-28
申请号：US648899
申请日：1991-01-31
申请人： Jean-Francois Helard , Jean-Michel Lemesle , Roselyne Halbert-Lassalle , Bernard Le Floch
发明人： Jean-Francois Helard , Jean-Michel Lemesle , Roselyne Halbert-Lassalle , Bernard Le Floch
IPC分类号： H04L1/00 , H04L25/02 , H04L27/26 , H04J4/00
CPC分类号： H04L1/0071 , H04L25/0204 , H04L25/0214 , H04L25/0226 , H04L25/0232 , H04L27/2647 , H04L5/0048
摘要： A method for the broadcasting of digital data, intended to be received notably by mobile receivers moving about in an urban environment, that is, under conditions of multiple propagation and in the presence of parasites and jamming, enabling a coherent demodulation under such conditions of reception. This method is one for the broadcasting of digital data, notably for radio broadcasting at a high bit rate towards mobile receivers, of the type providing for the distribution of the data in the form of digital elements in the frequency-time space f-t and the transmission of symbols each constituted by a multiplex of N orthogonal carrier frequencies modulated by a set of digital elements and broadcast simultaneously, certain of the digital elements being reference elements with a value and position in the frequency-time space f-t that are known to the receivers.
摘要翻译：一种用于广播数字数据的方法，旨在由在城市环境中移动的移动接收机，即在多重传播的条件下以及存在寄生和干扰的情况下被特别接收，使得能够在这种接收状态下进行相干解调。该方法是用于广播数字数据的方法，特别是针对移动接收机的高比特率的无线电广播，提供在频率 - 时间空间ft中以数字元素的形式分发数据的类型，并且传输每个符号由由一组数字元素调制的N个正交载波频率的多路复用构成，并且同时广播，某些数字元素是具有接收机已知的频率 - 时间空间ft中的值和位置的参考元素。

3. 发明授权

US06282167B1 OFDM signal organized so as to simplify reception 失效
标题翻译： OFDM信号被组织以简化接收
公开(公告)号：US06282167B1
公开(公告)日：2001-08-28
申请号：US08765162
申请日：1997-03-19
申请人： Vincent Michon , Bernard Le Floch , Bertrand Sueur , Marc Riviere
发明人： Vincent Michon , Bernard Le Floch , Bertrand Sueur , Marc Riviere
IPC分类号： H04J1100
CPC分类号： H04L5/023 , H04L27/2602
摘要： The invention relates to a signal intended to be transmitted towards a plurality of receivers, of the type comprising at least two source signals and consisting of a plurality of independently modulated substantially orthogonal carrier frequencies distributed over a predetermined frequency band. According to the invention, said frequency band (12) is divided into at least two frequency sub-bands (131-134) each comprising a set of said substantially orthogonal carrier frequencies (11), and to each of said sub-bands is allocated one of said source signals, so that a receiver may retrieve from the transmitted signal, by filtration, at least one of said sub-bands and perform demodulation processing only on the carrier frequencies contained in the retrieved sub-bands. The invention also relates to a transmission process as well as to a receiver of such signal.
摘要翻译：本发明涉及一种旨在向多个接收机传输的信号，包括至少两个源信号，并由分布在预定频带上的多个独立调制的基本上正交的载波频率组成。根据本发明，所述频带（12）被划分为至少两个频率子带（131-134），每个频率子带包括一组所述基本上正交的载波频率（11），并且分配给每个所述子带所述源信号之一，使得接收机可以通过过滤从所发送的信号中检索所述子带中的至少一个，并且仅对包含在所检索的子带中的载波频率进行解调处理。本发明还涉及传输过程以及这种信号的接收机。

4. 发明授权

US5307376A Device for the coherent demodulation of time-frequency interlaced digital data, with estimation of the frequency response of the transmission channel and threshold, and corresponsing transmitter 失效
标题翻译：用于对时间频率隔行数字数据进行相干解调的装置，估计传输信道和阈值的频率响应，以及对应的发射机
公开(公告)号：US5307376A
公开(公告)日：1994-04-26
申请号：US820484
申请日：1992-01-14
申请人： M. Damien Castelain , M. Jean-Francois Helard , M. Bernard Le Floch , M. Jean-Christophe Rault
发明人： M. Damien Castelain , M. Jean-Francois Helard , M. Bernard Le Floch , M. Jean-Christophe Rault
IPC分类号： H04B14/00 , H04J11/00 , H04L25/02 , H04L27/00 , H04L27/26 , H04K1/10 , H04L27/28
CPC分类号： H04L27/2647 , H04L25/022 , H04L25/0226 , H04L25/0232
摘要： A method and apparatus for the coherent demodulation of a digital signal constituted by digital elements distributed in the time-frequency space and transmitted in the form of symbols constituted by a multiplex of N orthogonal carrier frequencies modulated by a set of said digital elements and broadcast simultaneously, the digital signal also including reference elements having a known value position in said time frequency space. The method includes a Fourier transform of at least samples of said digital signal containing said reference elements from a frequency domain into a temporal domain, a weighting of the transformed samples in the temporal domain by a rectangular temporal window f.sub.n, a thresholding of the transformed samples in the temporal domain to eliminate any samples below a predetermined threshold, and a reverse Fourier transform of the samples remaining after said weighting and thresholding from the temporal domain into the frequency domain for projection onto said digital signal. The threshold level can be fixed or varied based on the power level of the noise affecting the transmission channel or an estimated pulse response of the transmission channel.
摘要翻译：一种数字信号的相干解调方法和装置，该数字信号由分布在时间 - 频率空间中的数字元素构成，并以由一组所述数字元素调制的N个正交载波的多路复用构成的码元形式发送并同时广播数字信号还包括在所述时间频率空间中具有已知值位置的参考元件。该方法包括将包含所述参考元素的所述数字信号的至少样本从频域傅里叶变换为时域，通过矩形时间窗fn对时域中的变换样本进行加权，转换样本的阈值在时域中消除低于预定阈值的任何采样，以及在从时域到频域的所述加权和阈值之后剩余的采样的逆傅立叶变换以投影到所述数字信号上。阈值电平可以基于影响传输信道的噪声的功率电平或传输信道的估计脉冲响应来修正或变化。

5. 发明授权

US5228025A Method for the broadcasting of digital data, notably for radio broadcasting at a high bit-rate towards mobile receivers, with time-frequency interlacing and assistance in the acquisition of automatic frequency control, and corresponding receiver 失效
标题翻译：用于广播数字数据的方法，用于在移动接收机的高速率下进行无线电广播的方法，具有时频接口和自动频率控制的接收以及相应的接收机的接收
公开(公告)号：US5228025A
公开(公告)日：1993-07-13
申请号：US648188
申请日：1991-01-31
申请人： Bernard Le Floch , Jean-Christophe Rault , Daniel Pommier , Damien Castelain
发明人： Bernard Le Floch , Jean-Christophe Rault , Daniel Pommier , Damien Castelain
IPC分类号： H04L1/00 , H04L27/26
CPC分类号： H04L1/0071 , H04L27/2613 , H04L27/2657 , H04L27/2675 , H04L5/0007 , H04L5/0048
摘要： A method for the broadcasting of digital data, in channels to which multiple paths are assigned, the characteristics of which vary in time, with time-frequency interlacing and assistance in the acquisition of the automatic frequency control. This method is one of the type providing for the distribution of the data in the form of digital elements in the frequency-time space f-t and the transmission of frames of symbols each constituted by a multiplex of N orthogonal carrier frequencies modulated by a set of the digital elements and broadcast simultaneously, the method providing for the transmission of a pattern of frequency synchronization, recurrent in time. It can be applied notably for radio broadcasting at a high bit rate towards mobile receivers, and for example, to COFDM radio broadcasting.
摘要翻译：一种用于在分配多个路径的信道中广播数字数据的方法，其特征随时间而变化，并且在采集自动频率控制方面具有时频隔行扫描和协助。该方法是提供以频率 - 时间空间ft的数字元素的形式分配数据的类型之一，以及每个由多个由N个正交载波调制的N个正交载波频率构成的符号的帧的传输数字元素和广播同时，提供频率同步模式传输的方法，及时复现。它可以特别适用于朝向移动接收机的高比特率的无线电广播，并且例如适用于COFDM无线电广播。

6. 再颁专利

USRE36430E Device for the transmission of digital data with at least two levels of protection and corresponding reception device 失效
标题翻译：用于传输具有至少两个级别的保护的数字数据和相应的接收装置的装置
公开(公告)号：USRE36430E
公开(公告)日：1999-12-07
申请号：US409499
申请日：1995-03-23
申请人： Roselyn Halbert-Lassalle , Jean Francois Helard , Bernard Le Floch
发明人： Roselyn Halbert-Lassalle , Jean Francois Helard , Bernard Le Floch
IPC分类号： H04L1/00 , H04L27/26 , H04J9/00
CPC分类号： H04L1/0068 , H04L1/0003 , H04L1/0009 , H04L1/0017 , H04L1/0025 , H04L1/004 , H04L1/007 , H04L1/0071 , H04L27/2604 , H04L2001/0098
摘要： A device for the transmission of digital data with at least two levels of protection, of the type providing for the distribution of the data to be transmitted in the form of digital elements in the time-frequency space and the transmission of symbols each formed by a multiplex of N orthogonal carriers modulated by a set of the digital elements, and transmitted simultaneously, the device including channel .[.encoding.]. .Iadd.encodes .Iaddend.means comprising at least two types of modulation and/or at least two encoding efficiency levels. This enables to optimize the use of the transmission channel by assigning differentiated transmission techniques to portions of data of a same digital train as a function of the different levels of protection sought, against transmission errors.
摘要翻译：用于传输具有至少两个级别的保护的数字数据的装置，提供以时间 - 频率空间中的数字元素形式发送的数据的分发，以及由由一组数字元素调制的N个正交载波的多路复用并且同时传输，包括信道[编码]的装置编码包括至少两种类型的调制和/或至少两个编码效率等级的装置。这使得能够通过针对传输错误将差分传输技术分配给与所寻求的不同级别的保护级别相同的数字列的数据的部分来优化传输信道的使用。

7. 发明授权

US06810006B2 OFDM signal organized so as to simplify reception 有权
标题翻译： OFDM信号被组织以简化接收
公开(公告)号：US06810006B2
公开(公告)日：2004-10-26
申请号：US09919009
申请日：2001-07-31
申请人： Vincent Michon , Bernard Le Floch , Bertrand Sueur , Marc Riviere
发明人： Vincent Michon , Bernard Le Floch , Bertrand Sueur , Marc Riviere
IPC分类号： H04J1100
CPC分类号： H04L5/023 , H04L27/2602
摘要： The invention relates to a signal intended to be transmitted towards a plurality of receivers, of the type comprising at least two source signals and consisting of a plurality of independently modulated substantially orthogonal carrier frequencies distributed over a predetermined frequency band. According to the invention, the frequency band is divided into at least two frequency sub-bands each comprising a set of the substantially orthogonal carrier frequencies, and to each of the sub-bands is allocated one of the source signals, so that a receiver may retrieve from the transmitted signal, by filtration, at least one of the sub-bands and perform demodulation processing only on the carrier frequencies contained in the retrieved sub-bands. The invention also relates to a transmission process as well as to a receiver of such signal.

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