A reception device 10 includes a channel estimator 130 configured to calculate channel estimation information for each of first to fourth known signals, the channel estimation information indicating estimation of a characteristic of a channel of the radio signal and an SNR estimator 150 configured to interpolate channel estimation information on an intersection by using the channel estimation information on each of the first known signal and the fourth known signal, the intersection being where a line joining the first known signal and the fourth known signal intersects with a line joining the second known signal and the third known signal, and to interpolate channel estimation information on the intersection by using the channel estimation information on each of the second known signal and the third known signal, and to calculate noise power of the radio signal on the basis of a difference between the interpolated two channel estimation information.