BROADCAST SIGNAL TRANSMITTER AND RECEIVER, AND METHODS FOR TRANSMITTING AND RECEIVING BROADCAST SIGNALS

摘要

The present invention relates to a broadcast signal transmitter. The broadcast signal transmitter according to one embodiment of the present invention comprises: an input signal generator for generating a first input signal and a second input signal; a MIMO encoder for MIMO processing the first input signal and the second input signal to output a first transmission signal and a second transmission signal; and a first OFDM generator and a second OFDM generator for performing the OFDM modulation on the first transmission signal and the second transmission signal, respectively, wherein the MIMO processing involves the application of a MIMO matrix to the first input signal and the second input signal, the parameter 'a' varies depending on the modulation type of the first input signal and the second input signal, and the parameter 'a' of the MIMO matrix is set in such a manner as to adjust the power of the first input signal and the second input signal for the first transmission signal or the second transmission signal.