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1. 发明公开

EP0840485A3 Method and circuit for the synchronization of an OFDM receiver 失效
标题翻译：用于OFDM接收机同步的方法和电路
公开(公告)号：EP0840485A3
公开(公告)日：1998-06-10
申请号：EP97420183.2
申请日：1997-10-03
申请人： DISCOVISION ASSOCIATES
发明人： Davies, David Huw , Parker, Jonathan , Claydon, Anthony Peter John
IPC分类号： H04L27/26
CPC分类号： H04L1/0047 , H04L1/0071 , H04L25/0214 , H04L25/0232 , H04L27/265 , H04L27/2662 , H04L27/2676
摘要： A method and apparatus are disclosed for determining the boundaries of guard intervals of data symbols being received in a coded orthogonal frequency division multiplexed signal. Temporal samples separated by an interval of an active interval of a data symbol are associated in pairs, and difference signals obtained. The dispersion of a first comparison block of difference signals is determined, and compared to the dispersion of a second comparison block of difference signals, the second comparison block being displaced from the first comparison block by n samples. An F ratio is calculated for the dispersions of the two blocks. F ratios are iterated in a succession of comparison blocks, and a signal representing the F ratios subjected to peak detection. The peaks represent the boundaries of the symbol's guard interval. This information is utilized in synchronizing an FFT window for subsequent signal reconstruction.
摘要翻译：公开了一种用于确定在编码的正交频分复用信号中正在接收的数据符号的保护间隔的边界的方法和装置。由数据符号的有效间隔的间隔分隔的时间样本成对关联，并获得差分信号。确定差信号的第一比较块的离差，并与差信号的第二比较块的离散进行比较，第二比较块从第一比较块移位n个样本。计算两个块的分散体的F比率。 F比率在连续的比较块中迭代，并且表示F比率的信号经历峰值检测。峰值表示符号的保护间隔的边界。该信息用于同步FFT窗口以用于随后的信号重构。

2. 发明授权

EP0840485B1 Method and circuit for the synchronization of an OFDM receiver 失效
标题翻译：方法和电路装置用于同步OFDM接收机
公开(公告)号：EP0840485B1
公开(公告)日：2000-09-06
申请号：EP97420183.2
申请日：1997-10-03
申请人： DISCOVISION ASSOCIATES
发明人： Davies, David Huw , Parker, Jonathan , Claydon, Anthony Peter John
IPC分类号： H04L27/26
CPC分类号： H04L1/0047 , H04L1/0071 , H04L25/0214 , H04L25/0232 , H04L27/265 , H04L27/2662 , H04L27/2676

3. 发明公开

EP0840485A2 Method and circuit for the synchronization of an OFDM receiver 失效
标题翻译： Verfahren und Schaltungsanordung zur Synchronization eines OFDM-Empfängers
公开(公告)号：EP0840485A2
公开(公告)日：1998-05-06
申请号：EP97420183.2
申请日：1997-10-03
申请人： DISCOVISION ASSOCIATES
发明人： Davies, David Huw , Parker, Jonathan , Claydon, Anthony Peter John
IPC分类号： H04L27/26
CPC分类号： H04L1/0047 , H04L1/0071 , H04L25/0214 , H04L25/0232 , H04L27/265 , H04L27/2662 , H04L27/2676
摘要： A method and apparatus are disclosed for determining the boundaries of guard intervals of data symbols being received in a coded orthogonal frequency division multiplexed signal. Temporal samples separated by an interval of an active interval of a data symbol are associated in pairs, and difference signals obtained. The dispersion of a first comparison block of difference signals is determined, and compared to the dispersion of a second comparison block of difference signals, the second comparison block being displaced from the first comparison block by n samples. An F ratio is calculated for the dispersions of the two blocks. F ratios are iterated in a succession of comparison blocks, and a signal representing the F ratios subjected to peak detection. The peaks represent the boundaries of the symbol's guard interval. This information is utilized in synchronizing an FFT window for subsequent signal reconstruction.
摘要翻译：公开了一种用于确定在经编码的正交频分复用信号中接收的数据符号的保护间隔的边界的方法和装置。通过数据符号的有效间隔的间隔分开的时间样本成对关联，获得差分信号。确定差分信号的第一比较块的色散，并且与差分信号的第二比较块的色散进行比较，第二比较块从第一比较块移位n个样本。计算两个块的分散度的F比。 F比率在一系列比较块中迭代，并且表示经受峰值检测的F比的信号。峰值代表符号保护间隔的边界。该信息用于同步用于后续信号重建的FFT窗口。

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