Method and device for mapping pilot signal in unicast and broadcast/multicast mode

The invention provides a method for mapping pilot signal in the multiplexing mode of unicast service and multimedia broadcast/multicast service. The method comprises the following steps: the pilot frequency symbols of unicast service and multimedia broadcast/multicast are respectively generated; therefore, within a subframe, the pilot frequency symbols of multimedia broadcast/multicast maps the pilot frequency symbols of both multimedia broadcast/multicast service and unicast service to a plurality of transmitting antennas in the mode that the two pilot frequency symbols in time domain direction on each transmitting antenna are aligned, while the two adjacent pilot frequency symbols on both transmitting antennas are interlaced in frequency domain direction; moreover, the pilot frequency symbols of time division multiplexing (TDM) unicast service and multimedia broadcast/multicast service are transmitted by the transmitting antennas. On the contrary, the two pilot frequency symbols of multimedia broadcast/multicast service in time domain direction on each transmitting antenna are interlaced, while the two adjacent pilot frequency symbols on both transmitting antennas are aligned infrequency domain direction within the subframe.