| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily acquire symbol synchronism by an OFDM communication system which makes a bi-directional communication between the master and slave stations by putting data to be communicated between the master and slave stations in temporally divided time slots. SOLUTION: A data frame is provided with a synchronous symbol section for obtaining symbol synchronism and this synchronous symbol section is provided with a section A wherein a signal of the same waveform f(t) is repeated at intervals of timeΔt and a section B which is adjacent thereto; and a null carrier signal which is different from the waveform f(t) is inserted into the adjacent section B, the synchronous symbol section is temporally correlated with a time difference of timeΔt, and the border of the section B is detected to obtain the symbol synchronism of received data.</p> |
