| 摘要 |
When decoding an OFDM signal, frame and frequency synchronisation is necessary. The invention shows a method enabling a high accuracy for frame and frequency synchronization, which leads to a very low error rate in comparison to prior art. The inventive method for processing an OFDM (Orthogonal Frequency Division Multiplex)-signal is based on calculating (S5) a maximum of metric values (Lambda) for arrangements between a reference pilot pattern (REF-PP) and a received pilot pattern (REC-PP), on determining the respective maximizing arrangement, and on determining (S7) and maximizing integer frequency ({circumflex over (f)}I) and time offsets (Tsy) for frame synchronization and/or frequency synchronization (S8) of said OFDM-signal, wherein the calculation of said metric values (Lambda) is based on the evaluation of pairs (REF-PC-PAIR (P,(k, l); P(k, l+Nl))) of reference pilot cells (REF-PC), the members of said pairs (REF-PC-PAIR (P,(k, l); P(k, l+Nl))) corresponding to the same discrete frequency (k) and to different discrete times (l), and based on the signals (R(k, l), R(k, l+Nl)) of corresponding received cells with respect to said discrete frequencies (k) and sad discrete times (l).
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