To obtain a satisfactory decoding characteristics both under a multipath environment and under multiuser environment.

A radio receiving part 110 performs prescribed radio processing of a reception signal received through an antenna 100. A line estimate part 120 line estimates a propagation path for the reception signal. An equalizer 130 generates a replica of the reception signal to equalize the replica and eliminates a delay wave component from the reception signal. A channel deinterleaver 140 deinterleaves a direct wave component. A spatiotemporal turbo decoder 150 performs spatiotemporal turbo-decode of the reception signal. A data decision part 160 performs hard decision of soft output likelihood from the spatiotemporal turbo decoder 150 to obtain a spatiotemporal turbo decoding result. A channel interleaver 170 interleaves the spatiotemporal turbo decoding result and outputs the interleaved spatiotemporal turbo decoding result to the equalizer 130.