BROADCAST SIGNAL TRANSMITTER AND RECEIVER, AND BROADCAST SIGNAL TRANSMITTING AND RECEIVING METHOD

摘要

According to one embodiment of the present invention, a broadcast signal transmitter comprises: a symbol mapper which performs symbol mapping on data contained in a signal to output a first input signal of an M-QAM symbol stream and a second input signal of an N-QAM symbol stream; a MIMO encoder which performs MIMO processing on the first input signal and on the second input signal so as to output a first M*N-QAM-type transmission signal and a second M*N-QAM-type transmission signal; and a first OFDM generator and a second OFDM generator which perform OFDM modulation on the first transmission signal and on the second transmission signal, respectively, wherein said MIMO processing is performed by applying a MIMO matrix to the first input signal and to the second input signal, and said MIMO matrix is set to adjust the power of the first input signal and the power of the second input signal using a parameter 'a.'