Minimum mean square error digital on-channel relay

The co-channel repeater for transmitting a broadcasting signal receiver is disclosed to amplify a broadcast signal received from the broadcasting signal transmitting apparatus. And the on-channel repeater is transmitting the amplified broadcast signal by using a frequency band which receives the broadcast signal. The on-channel repeater receives the broadcast signal from the broadcast signal transmitting apparatus by using a plurality of receive antennas. The on-channel repeater is for a minimum mean square error for each receive antenna: calculated (MMSE Minimum Mean Square Error) weight, and by using a minimum mean square error combining weights to the signals received by the respective reception antennas.