122 passes certain frequency components of a high frequency transmission signal supplied from the agc 124 the agc 124 makes automatic gain control of a high frequency received signal supplied from the bpf 122 and a high frequency transmission signal supplied from the dc uc 126 the dc uc 126 down converts a high frequency received signal supplied from the agc 124 to a baseband received signal further the dc uc 126 up converts a baseband transmission signal supplied from the ad da 128 to a high frequency transmission signal the ad da 128 converts a baseband received signal supplied from the dc uc 126 from analog to digital further the ad da 128 converts a baseband transmission signal supplied from the digital processing unit 130 from digital to analog the digital processing unit 130 includes an fft that performs fast fourier transform on a baseband received signal supplied from each branch a p s a demodulator a decoder and so on as the elements for reception further the digital processing unit 130 includes an encoder a modulator an s p an ifft and so on as the elements for transmission and supplies a baseband transmission signal on which a subcarrier signal is superimposed for example to the ad da 128 further the digital processing unit 130 has mimo processing function that enables mimo communication the control unit 142 controls the overall communication in the cell formed by the base station 10 such as transmission processing reception processing connection processing with the relay node 30 or the user equipment 20.