| 摘要 |
The present invention concerns a device for synchronizing a receiver on received preamble symbol modulated by an orthogonal frequency division multiplexing scheme. The device comprises:
- means for executing a coarse synchronization which provides an estimate of a first time offset and fractional frequency offset,
- means for removing the fractional frequency offset from the preamble symbol,
- means for performing an OFDM demodulation on the preamble symbol on which the fractional frequency offset is removed,
- means for removing from the subcarriers of the demodulated preamble symbol the effect of a phase shift keying modulation,
- means for performing an IDFT on the demodulated preamble symbol on which effect of a modulation wherein at least the phase on subcarriers on which preamble symbol is mapped is modified according to the binary information value of the preamble sequence carried by the subcarrier,
- means for determining a second time offset from the output of the inverse discrete Fourier transform,
- means for compensating the effect of the time offset for next received orthogonal division multiplexing symbol using the second time offset. |
