The circuit size of a diversity receiver for an orthogonal frequency
division multiplexing signal is reduced, and the diversity effect is
increased, by providing a power ratio comparator that calculates a
difference value as a ratio of powers derived from channel estimation
results for subcarrier components received from two antennas (11), (21)
and compares the calculated difference value with a predetermined
threshold, and a selective/equal gain combining selector (33) that
outputs one of the received demodulated signals when the comparison
result indicates that the calculated difference value is greater than the
threshold value.