OFDM signal receiving and dispatching method and apparatus

The present invention relates to a mobile communication field, disclosing an orthogonal frequency division multiplexing signal receiving method and device, having a good antijamming capability when transferring the ACK information. Signal sequences[s1 and s2]are arranged at the transmitting end according to the value of the waiting signal, the s1 and the s2 are respectively multiplied by an orthogonal frequency spreading code and then being added, and then sending to the receiver in the OFDM mode; a corresponding mode used for receiving and de-spreading is arranged at the receiver. If the signal sequences set for the different dereferences of the waiting signal by the sender are directly crossed with each other, the receiver has a relative treatment to the signal sequence after multiplying, and then gets the waiting signal from the sender; if the phase displacements between the two signal sequences s1 and s2 set for the different dereferences of the waiting signal by the sender are different, the receiver gets the waiting signal from the sender through the style of phase detection.