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

摘要

A broadcast signal transmitter according to one embodiment of the present invention includes: an input signal generation part generating a first input signal and a second input signal; an MIMO encoder outputting a first transmission signal and a second transmission signal by MIMO processing of the first input signal and the second input signal; and a first OFDM generator and a second OFDM generator performing OFDM modulation of the first transmission signal and the second transmission signal.The MIMO processing applies MIMO matrix to the first input signal and the second input signal. The MIMO matrix changes phase by using phase rotation matrix, and adjusts the power of the first input signal and the second input signal by using a parameter a, and the parameter a is set as a different value depending on the modulation type of the first input signal and the second input signal.