Method for enhancing performance of multi-input multi-output system on line-of-sight

An interference removing module of a receiver in a multi-input multi-output system for point-to-point communication between a transmitter and a receiver on a line-of-sight, the interference removing module comprising:

• an attenuator on a direct path for processing a first received signal of the first received signal and a second received signal received through two receiving antennas;
• a phase shifter on a cross path for processing the second received signal of the first received signal and the second received signal received through the two receiving antennas;
• a coupler generating a reconstruction signal for a transmission signal transmitted from the transmitter by synthesizing an output of the attenuator and an output of the phase shifter;
• and
• a controller performing overall control,
• wherein according to control of the controller, interference signals on the direct path and the cross path are removed to generate the reconstruction signal removed with the interference signal in the coupler.