Smart antenna beamforming device in communication system and method thereof

A device for forming a beam based on a plurality of signals received through a plurality of antennas in a base station of a communication system, the device comprising:

• a Direction-Of-Arrival (DOA) estimation unit for estimating DOAs of the plurality of signals based on a data subcarrier matrix obtained from the plurality of signals;
• a pre-spatial filtering unit for performing a filtering operation for the data subcarrier matrix to generate a filtering matrix by using the estimated DOAs;
• a signal identification unit for identifying at least one desired signal and at least one interference signal from the plurality of received signals by using a data sequence generated by the filtering matrix, and generating the DOA of the at least one desired signal and the DOA of the at least one interference signal from the estimated DOAs;
• a spatial filtering unit for generating an interference-plus-noise covariance matrix by using the at least one DOA of the at least one interference signal, eliminating the at least one interference signal by using the covariance matrix and the at least one DOA of at least one the desired signal, and forming a plurality of final beams for the at least one desired signal;
• and
• a channel estimating and signal combining unit for performing a maximal ratio combining on outputs according to the plurality of final to generate a combined signal.

A device for forming a beam based on a plurality of signals received through a plurality of antennas in a base station of a communication system, the device comprising:

• means for estimating Direction-Of-Arrivals (DOAs) of the plurality of signals;
• means for identifying at least one original signal and at least one interference signal among the plurality of signals;
• means for identifying at least one first DOA of the at least one original signal and at least one second DOA of the at least one original signal among the DOAs;
• and
• means for forming at least one main beam in a direction of the at least desired signal by using the at least one first DOA and the at least one second DOA.