Signal receiving apparatus and method for wireless communication system using multiple antennas

A receiving apparatus for a wireless communication system using multiple antennas, the receiving apparatus comprising:

• an RF unit comprising a predetermined number of receiving ends configured to receive signals received from a predetermined number of transmitting ends through multiple paths;
• a signal conversion and compensation unit configured to receive signals outputted from the RF unit, convert analog signals into digital signals, remove DC components from the digital signals, and compensate in-phase/quadrature-phase (I/Q) mismatch;
• a saturation based carrier sensing unit configured to sense a carrier according to saturation state degrees of the signals, and provide saturation state information;
• an automatic gain control unit configured to receive the digital signals and the saturation state information and perform an automatic gain control thereon;
• a noise matching amplification unit configured to amplify noises on the multiple paths according to a predetermined ratio by using information on the automatic gain control during a predetermined period provided from the automatic gain control unit;
• and
• a carrier frequency offset (CFO)/phase correction and fast Fourier transform (FFT) process unit configured to correct a carrier frequency offset of a signal outputted from the noise matching amplification unit, and perform an FFT process to compensate a phase of the signal outputted from the noise matching amplification unit.