A digital broadcast receiver receives a digital broadcast signal through a plurality of antennas, orthogonally demodulates the received signals, performs channel estimation by detecting a delay profile from a known signal included in each of the orthogonally demodulated signals, and uses the channel estimation results to equalize data signals included in the orthogonally demodulated signals. The delay profiles are also used to estimate the signal quality of each of the equalized data signals by determining the power of the signal component and the power of the noise component in each delay profile and calculating a signal to noise ratio. Diversity combining is performed by weighting the equalized data signals on a basis of their estimated signal quality.