Disclosed is a broadcast signal transmitter. A broadcasting signal transmitter, according to one embodiment of the present invention, comprises; a BICM encoder, which FEC encodes and bit interleaves PLP data and signaling information; a frame builder, which builds a frame by cell mapping the PLP data and the signaling information; a MISO encoder, which MISO encoding the PLP data for MISO encoding and the signaling information; and an OFDM generator, which OFDM modulates the PLP data and the signaling information, wherein the BICM encoder includes a MIMO encoder, which MIMO encodes PLP data for MIMO transmission, which is included in the PLP data, and the frame builder spreads the signaling information about the next frame in the data symbol section of the frame.