In the invention, at transmitting terminal, the original information treated with carrier modulation is serial-parallel converted into several branch data streams whose amounts are identical with the amounts of antennas; the branch data streams and frequency-domain pilot frequency sequence are commonly mapped into the data position corresponding to the preset frequency-domain pilot frequency pattern; generating each antenna data information which is processed with OFDM modulation and is transmitted by RF transmission. At receiving terminal, each antenna receives the RF signals and generates time-domain output sequence the time-domain output sequence is correlated with the reference sequence to construct synchronous objective function between each pair of antennas so as to implement the synchronization between time and frequency.