公开(公告)号：US5357502A

公开(公告)日：1994-10-18

申请号：US39964

申请日：1993-03-30

申请人： Damien Castelain ,  Joel Richard ,  Roselyne Halbert-Lasselle ,  Daniel Pommier

发明人： Damien Castelain ,  Joel Richard ,  Roselyne Halbert-Lasselle ,  Daniel Pommier

IPC分类号： H04L27/26 ,  H04B7/02 ,  H04L1/02

CPC分类号： H04L27/2649

摘要： A device for the reception of digital data broadcast at a high bit rate for reception by mobile receivers is disclosed. The device operates under adverse conditions of multiple propagation corresponding to the Rayleigh process and imperfect frequency tuning to minimize the inter-symbol interference in the frequency domain. The device receives a digital signal having digital elements distributed in the frequency-time space f-t and transmitted in the form of symbols each constituted by a multiplex of N orthogonal carrier frequencies modulated by a set of digital elements and broadcast simultaneously. The device includes a module for transposition by a local oscillator, baseband filtering and analog-digital conversion, a temporal windowing module for the selection of the useful samples and a mathematical transformation module, the temporal windowing module applying a Nyquist window type of temporal window with non-zero roll-off.

摘要翻译： 公开了一种用于接收以高比特率广播以便移动接收机接收的数字数据的装置。 该装置在对应于瑞利处理的多个传播的不利条件和不完美的频率调谐下工作，以最小化频域中的符号间干扰。 该装置接收数字信号，该数字信号具有分布在频率 - 时间空间f-t中的数字信号，并且以每个由一组数字元素调制的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。 该装置包括用于通过本地振荡器进行转置的模块，基带滤波和模拟数字转换，用于选择有用样本的时间窗口模块和数学变换模块，时间窗口模块将奈奇斯窗口类型的时间窗口应用于 非零滚降。