发明名称 |
VERFAHREN UND SCHALTUNGSANORDUNG ZUR SYNCHRONISATION EINES OFDM-EMPFÄNGERS |
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. <IMAGE> |
申请公布号 |
AT196218(T) |
申请公布日期 |
2000.09.15 |
申请号 |
AT19970420183T |
申请日期 |
1997.10.03 |
申请人 |
DISCOVISION ASSOCIATES |
发明人 |
DAVIES, DAVID HUW;PARKER, JONATHAN;CLAYDON, ANTHONY PETER JOHN |
分类号 |
H04J11/00;H04L1/00;H04L7/00;H04L25/02;H04L27/26;(IPC1-7):H04L27/26 |
主分类号 |
H04J11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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