| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily obtain an exact synchronization signal on the receiving side in the case of receiving an OFDM signal. SOLUTION: An exact clock signal to drive a receiver is generated by providing an IFFT circuit to generate a multilevel QAM modulation signal, a guard interval setting circuit and a clock signal generating circuit to drive both of the circuits, setting phases as prescribed values at starting points of a plurality of symbol sections by the IFFT circuit, generating a pilot signal of high-order frequency with prescribed frequency ratio with the clock signal, making the pilot signal be continuously transmitted over a plurality of symbol sections including guard interval sections on the transmitter side of the OFDM signal, and obtaining the pilot signal by demodulating it on the receiver side.</p> |
