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1.发明授权Device for the transmission of digital data with at least two levels of protection and corresponding reception device 失效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
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。
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2.发明授权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
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。
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